/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:54:10,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:54:10,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:54:10,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:54:10,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:54:10,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:54:10,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:54:10,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:54:10,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:54:10,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:54:10,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:54:10,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:54:10,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:54:10,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:54:10,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:54:10,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:54:10,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:54:10,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:54:10,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:54:10,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:54:10,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:54:10,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:54:10,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:54:10,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:54:10,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:54:10,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:54:10,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:54:10,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:54:10,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:54:10,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:54:10,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:54:10,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:54:10,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:54:10,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:54:10,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:54:10,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:54:10,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:54:10,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:54:10,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:54:10,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:54:10,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:54:10,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 04:54:10,781 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:54:10,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:54:10,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:54:10,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:54:10,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:54:10,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:54:10,783 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:54:10,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:54:10,783 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:54:10,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:54:10,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:54:10,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:54:10,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:54:10,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:54:10,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:54:10,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:54:10,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:54:10,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:54:10,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:54:10,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:54:10,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:54:10,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:54:10,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:54:10,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:54:10,787 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:54:10,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:54:11,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:54:11,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:54:11,003 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:54:11,003 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:54:11,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-01-28 04:54:11,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:54:12,094 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:54:12,094 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-01-28 04:54:12,099 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e699ae39f/d0ebd47d468a4fcab274770aa6c47e67/FLAGaaea64a6c [2023-01-28 04:54:12,496 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e699ae39f/d0ebd47d468a4fcab274770aa6c47e67 [2023-01-28 04:54:12,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:54:12,511 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:54:12,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:54:12,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:54:12,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:54:12,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba27da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12, skipping insertion in model container [2023-01-28 04:54:12,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:54:12,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:54:12,663 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-queue-add-3-nl.wvr.c[3615,3628] [2023-01-28 04:54:12,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:54:12,681 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:54:12,706 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-queue-add-3-nl.wvr.c[3615,3628] [2023-01-28 04:54:12,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:54:12,719 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:54:12,719 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:54:12,724 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:54:12,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12 WrapperNode [2023-01-28 04:54:12,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:54:12,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:54:12,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:54:12,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:54:12,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,753 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 265 [2023-01-28 04:54:12,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:54:12,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:54:12,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:54:12,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:54:12,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:54:12,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:54:12,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:54:12,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:54:12,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (1/1) ... [2023-01-28 04:54:12,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:54:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:12,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 04:54:12,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 04:54:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:54:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:54:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:54:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:54:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:54:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:54:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:54:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 04:54:12,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:54:12,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:54:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:54:12,836 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 04:54:12,950 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:54:12,951 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:54:13,278 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:54:13,345 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:54:13,345 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-28 04:54:13,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:54:13 BoogieIcfgContainer [2023-01-28 04:54:13,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:54:13,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:54:13,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:54:13,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:54:13,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:54:12" (1/3) ... [2023-01-28 04:54:13,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e076464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:54:13, skipping insertion in model container [2023-01-28 04:54:13,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:54:12" (2/3) ... [2023-01-28 04:54:13,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e076464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:54:13, skipping insertion in model container [2023-01-28 04:54:13,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:54:13" (3/3) ... [2023-01-28 04:54:13,352 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-01-28 04:54:13,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:54:13,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:54:13,363 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:54:13,417 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 04:54:13,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 214 transitions, 452 flow [2023-01-28 04:54:13,518 INFO L130 PetriNetUnfolder]: 18/211 cut-off events. [2023-01-28 04:54:13,518 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:54:13,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 211 events. 18/211 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 128 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-01-28 04:54:13,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 214 transitions, 452 flow [2023-01-28 04:54:13,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 201 transitions, 420 flow [2023-01-28 04:54:13,535 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:54:13,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 201 transitions, 420 flow [2023-01-28 04:54:13,548 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 201 transitions, 420 flow [2023-01-28 04:54:13,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 420 flow [2023-01-28 04:54:13,581 INFO L130 PetriNetUnfolder]: 18/201 cut-off events. [2023-01-28 04:54:13,581 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:54:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-01-28 04:54:13,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 1880 [2023-01-28 04:54:19,470 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-01-28 04:54:19,471 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-01-28 04:54:19,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:54:19,484 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;@19d61ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:54:19,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 04:54:19,488 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-01-28 04:54:19,489 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:54:19,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:19,489 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] [2023-01-28 04:54:19,490 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)] === [2023-01-28 04:54:19,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2034446607, now seen corresponding path program 1 times [2023-01-28 04:54:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:19,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482090393] [2023-01-28 04:54:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:19,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482090393] [2023-01-28 04:54:19,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482090393] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:19,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:19,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 04:54:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521690682] [2023-01-28 04:54:19,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 04:54:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 04:54:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 04:54:19,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 422 [2023-01-28 04:54:19,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:19,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:19,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 422 [2023-01-28 04:54:19,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:19,859 INFO L130 PetriNetUnfolder]: 323/460 cut-off events. [2023-01-28 04:54:19,859 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-01-28 04:54:19,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1341 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2023-01-28 04:54:19,873 INFO L137 encePairwiseOnDemand]: 421/422 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-01-28 04:54:19,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2023-01-28 04:54:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 04:54:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 04:54:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 405 transitions. [2023-01-28 04:54:19,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985781990521326 [2023-01-28 04:54:19,889 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 405 transitions. [2023-01-28 04:54:19,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 405 transitions. [2023-01-28 04:54:19,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:19,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 405 transitions. [2023-01-28 04:54:19,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:19,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:19,901 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:19,902 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 405 transitions. [2023-01-28 04:54:19,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2023-01-28 04:54:19,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 04:54:19,907 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-01-28 04:54:19,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-01-28 04:54:19,913 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-01-28 04:54:19,913 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-01-28 04:54:19,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:19,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:19,913 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] [2023-01-28 04:54:19,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:54:19,914 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)] === [2023-01-28 04:54:19,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash -192981207, now seen corresponding path program 1 times [2023-01-28 04:54:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:19,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109082634] [2023-01-28 04:54:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109082634] [2023-01-28 04:54:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109082634] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:20,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:20,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 04:54:20,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562236145] [2023-01-28 04:54:20,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:20,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:54:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:54:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:54:20,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 422 [2023-01-28 04:54:20,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:20,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 422 [2023-01-28 04:54:20,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:20,193 INFO L130 PetriNetUnfolder]: 354/534 cut-off events. [2023-01-28 04:54:20,193 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 04:54:20,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 534 events. 354/534 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1723 event pairs, 212 based on Foata normal form. 52/442 useless extension candidates. Maximal degree in co-relation 1089. Up to 460 conditions per place. [2023-01-28 04:54:20,195 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 25 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-01-28 04:54:20,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 222 flow [2023-01-28 04:54:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:54:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:54:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 878 transitions. [2023-01-28 04:54:20,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161137440758294 [2023-01-28 04:54:20,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 878 transitions. [2023-01-28 04:54:20,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 878 transitions. [2023-01-28 04:54:20,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:20,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 878 transitions. [2023-01-28 04:54:20,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,203 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 878 transitions. [2023-01-28 04:54:20,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 222 flow [2023-01-28 04:54:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 04:54:20,204 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2023-01-28 04:54:20,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-01-28 04:54:20,205 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-01-28 04:54:20,205 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2023-01-28 04:54:20,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:20,206 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] [2023-01-28 04:54:20,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:54:20,206 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)] === [2023-01-28 04:54:20,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -122480723, now seen corresponding path program 1 times [2023-01-28 04:54:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:20,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597644643] [2023-01-28 04:54:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:20,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597644643] [2023-01-28 04:54:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597644643] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:54:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21999468] [2023-01-28 04:54:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:54:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:54:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:54:20,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 422 [2023-01-28 04:54:20,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:20,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 422 [2023-01-28 04:54:20,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:20,451 INFO L130 PetriNetUnfolder]: 452/664 cut-off events. [2023-01-28 04:54:20,451 INFO L131 PetriNetUnfolder]: For 443/443 co-relation queries the response was YES. [2023-01-28 04:54:20,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 664 events. 452/664 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2352 event pairs, 280 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1890. Up to 461 conditions per place. [2023-01-28 04:54:20,454 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2023-01-28 04:54:20,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2023-01-28 04:54:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:54:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:54:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2023-01-28 04:54:20,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152843601895735 [2023-01-28 04:54:20,456 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2023-01-28 04:54:20,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2023-01-28 04:54:20,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:20,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2023-01-28 04:54:20,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,461 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 701 transitions. [2023-01-28 04:54:20,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2023-01-28 04:54:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-28 04:54:20,464 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-01-28 04:54:20,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-01-28 04:54:20,465 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-01-28 04:54:20,467 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-01-28 04:54:20,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:20,468 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] [2023-01-28 04:54:20,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 04:54:20,468 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)] === [2023-01-28 04:54:20,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1322683899, now seen corresponding path program 1 times [2023-01-28 04:54:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:20,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946880973] [2023-01-28 04:54:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:21,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:21,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946880973] [2023-01-28 04:54:21,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946880973] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:21,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:21,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 04:54:21,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176160142] [2023-01-28 04:54:21,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:21,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 04:54:21,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:21,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 04:54:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 04:54:21,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 04:54:21,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:21,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 04:54:21,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:21,688 INFO L130 PetriNetUnfolder]: 594/862 cut-off events. [2023-01-28 04:54:21,688 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2023-01-28 04:54:21,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 862 events. 594/862 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2894 event pairs, 13 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 2251. Up to 576 conditions per place. [2023-01-28 04:54:21,692 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 71 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-01-28 04:54:21,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 102 transitions, 519 flow [2023-01-28 04:54:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:54:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:54:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1613 transitions. [2023-01-28 04:54:21,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246972090573986 [2023-01-28 04:54:21,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1613 transitions. [2023-01-28 04:54:21,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1613 transitions. [2023-01-28 04:54:21,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:21,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1613 transitions. [2023-01-28 04:54:21,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.22222222222223) internal successors, (1613), 9 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,705 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,705 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1613 transitions. [2023-01-28 04:54:21,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 102 transitions, 519 flow [2023-01-28 04:54:21,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 102 transitions, 515 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 04:54:21,707 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 287 flow [2023-01-28 04:54:21,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2023-01-28 04:54:21,708 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-01-28 04:54:21,708 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 287 flow [2023-01-28 04:54:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:21,709 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] [2023-01-28 04:54:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 04:54:21,710 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)] === [2023-01-28 04:54:21,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1126960381, now seen corresponding path program 2 times [2023-01-28 04:54:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520273721] [2023-01-28 04:54:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:21,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520273721] [2023-01-28 04:54:21,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520273721] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:21,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:21,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 04:54:21,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412878536] [2023-01-28 04:54:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:21,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:54:21,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:54:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:54:21,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-01-28 04:54:21,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:21,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-01-28 04:54:21,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:21,898 INFO L130 PetriNetUnfolder]: 485/716 cut-off events. [2023-01-28 04:54:21,898 INFO L131 PetriNetUnfolder]: For 453/466 co-relation queries the response was YES. [2023-01-28 04:54:21,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 716 events. 485/716 cut-off events. For 453/466 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2231 event pairs, 107 based on Foata normal form. 27/569 useless extension candidates. Maximal degree in co-relation 2435. Up to 632 conditions per place. [2023-01-28 04:54:21,902 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-01-28 04:54:21,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 421 flow [2023-01-28 04:54:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:54:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:54:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-01-28 04:54:21,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684044233807267 [2023-01-28 04:54:21,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-01-28 04:54:21,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-01-28 04:54:21,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:21,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-01-28 04:54:21,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,907 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 287 flow. Second operand 3 states and 593 transitions. [2023-01-28 04:54:21,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 421 flow [2023-01-28 04:54:21,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 363 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-01-28 04:54:21,910 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 238 flow [2023-01-28 04:54:21,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-01-28 04:54:21,911 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-01-28 04:54:21,911 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 238 flow [2023-01-28 04:54:21,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:21,911 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] [2023-01-28 04:54:21,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 04:54:21,911 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)] === [2023-01-28 04:54:21,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash 247356795, now seen corresponding path program 3 times [2023-01-28 04:54:21,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:21,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048519926] [2023-01-28 04:54:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:22,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048519926] [2023-01-28 04:54:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048519926] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:22,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 04:54:22,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913645791] [2023-01-28 04:54:22,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:22,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 04:54:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 04:54:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-28 04:54:22,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 04:54:22,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:22,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 04:54:22,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:22,741 INFO L130 PetriNetUnfolder]: 604/893 cut-off events. [2023-01-28 04:54:22,741 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-01-28 04:54:22,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 893 events. 604/893 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2922 event pairs, 123 based on Foata normal form. 1/692 useless extension candidates. Maximal degree in co-relation 2897. Up to 754 conditions per place. [2023-01-28 04:54:22,746 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 70 selfloop transitions, 26 changer transitions 3/99 dead transitions. [2023-01-28 04:54:22,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 99 transitions, 606 flow [2023-01-28 04:54:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:54:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:54:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1591 transitions. [2023-01-28 04:54:22,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41890468667719855 [2023-01-28 04:54:22,750 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1591 transitions. [2023-01-28 04:54:22,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1591 transitions. [2023-01-28 04:54:22,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:22,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1591 transitions. [2023-01-28 04:54:22,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.77777777777777) internal successors, (1591), 9 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,756 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,756 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 238 flow. Second operand 9 states and 1591 transitions. [2023-01-28 04:54:22,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 99 transitions, 606 flow [2023-01-28 04:54:22,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 99 transitions, 577 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 04:54:22,760 INFO L231 Difference]: Finished difference. Result has 57 places, 71 transitions, 413 flow [2023-01-28 04:54:22,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=57, PETRI_TRANSITIONS=71} [2023-01-28 04:54:22,760 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2023-01-28 04:54:22,760 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 71 transitions, 413 flow [2023-01-28 04:54:22,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:22,761 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] [2023-01-28 04:54:22,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 04:54:22,761 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)] === [2023-01-28 04:54:22,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 740987369, now seen corresponding path program 4 times [2023-01-28 04:54:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155013504] [2023-01-28 04:54:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:22,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155013504] [2023-01-28 04:54:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155013504] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:22,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:22,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 04:54:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174282986] [2023-01-28 04:54:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:54:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:54:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:54:22,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-01-28 04:54:22,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 71 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:22,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-01-28 04:54:22,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:22,931 INFO L130 PetriNetUnfolder]: 532/822 cut-off events. [2023-01-28 04:54:22,931 INFO L131 PetriNetUnfolder]: For 759/768 co-relation queries the response was YES. [2023-01-28 04:54:22,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 822 events. 532/822 cut-off events. For 759/768 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2946 event pairs, 156 based on Foata normal form. 63/725 useless extension candidates. Maximal degree in co-relation 2773. Up to 541 conditions per place. [2023-01-28 04:54:22,936 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 60 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-01-28 04:54:22,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 501 flow [2023-01-28 04:54:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:54:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:54:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-01-28 04:54:22,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46208530805687204 [2023-01-28 04:54:22,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-01-28 04:54:22,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-01-28 04:54:22,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:22,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-01-28 04:54:22,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,941 INFO L175 Difference]: Start difference. First operand has 57 places, 71 transitions, 413 flow. Second operand 3 states and 585 transitions. [2023-01-28 04:54:22,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 501 flow [2023-01-28 04:54:22,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 459 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-01-28 04:54:22,945 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 324 flow [2023-01-28 04:54:22,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-01-28 04:54:22,945 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2023-01-28 04:54:22,945 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 324 flow [2023-01-28 04:54:22,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:22,946 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] [2023-01-28 04:54:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 04:54:22,946 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)] === [2023-01-28 04:54:22,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1391984997, now seen corresponding path program 5 times [2023-01-28 04:54:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458562618] [2023-01-28 04:54:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:23,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:23,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458562618] [2023-01-28 04:54:23,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458562618] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:23,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:23,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 04:54:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545250886] [2023-01-28 04:54:23,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:23,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 04:54:23,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 04:54:23,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 04:54:23,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 04:54:23,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:23,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:23,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 04:54:23,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:23,832 INFO L130 PetriNetUnfolder]: 607/947 cut-off events. [2023-01-28 04:54:23,832 INFO L131 PetriNetUnfolder]: For 773/773 co-relation queries the response was YES. [2023-01-28 04:54:23,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 947 events. 607/947 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3552 event pairs, 113 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3294. Up to 719 conditions per place. [2023-01-28 04:54:23,837 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 83 selfloop transitions, 23 changer transitions 3/109 dead transitions. [2023-01-28 04:54:23,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 717 flow [2023-01-28 04:54:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:54:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:54:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1594 transitions. [2023-01-28 04:54:23,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41969457609268035 [2023-01-28 04:54:23,843 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1594 transitions. [2023-01-28 04:54:23,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1594 transitions. [2023-01-28 04:54:23,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:23,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1594 transitions. [2023-01-28 04:54:23,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.11111111111111) internal successors, (1594), 9 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:23,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:23,852 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:23,853 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 324 flow. Second operand 9 states and 1594 transitions. [2023-01-28 04:54:23,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 717 flow [2023-01-28 04:54:23,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 704 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 04:54:23,858 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 460 flow [2023-01-28 04:54:23,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-01-28 04:54:23,861 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-01-28 04:54:23,861 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 460 flow [2023-01-28 04:54:23,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:23,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:23,862 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] [2023-01-28 04:54:23,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 04:54:23,862 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)] === [2023-01-28 04:54:23,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash 948876929, now seen corresponding path program 6 times [2023-01-28 04:54:23,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:23,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919237307] [2023-01-28 04:54:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:24,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:24,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919237307] [2023-01-28 04:54:24,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919237307] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:24,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:24,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 04:54:24,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268337172] [2023-01-28 04:54:24,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 04:54:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 04:54:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-28 04:54:24,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 04:54:24,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 460 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:24,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 04:54:24,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:24,699 INFO L130 PetriNetUnfolder]: 616/971 cut-off events. [2023-01-28 04:54:24,699 INFO L131 PetriNetUnfolder]: For 1279/1279 co-relation queries the response was YES. [2023-01-28 04:54:24,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 971 events. 616/971 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3710 event pairs, 163 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3637. Up to 832 conditions per place. [2023-01-28 04:54:24,704 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 86 selfloop transitions, 19 changer transitions 3/108 dead transitions. [2023-01-28 04:54:24,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 824 flow [2023-01-28 04:54:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:54:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:54:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1586 transitions. [2023-01-28 04:54:24,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41758820431806215 [2023-01-28 04:54:24,709 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1586 transitions. [2023-01-28 04:54:24,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1586 transitions. [2023-01-28 04:54:24,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:24,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1586 transitions. [2023-01-28 04:54:24,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.22222222222223) internal successors, (1586), 9 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,719 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,719 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 460 flow. Second operand 9 states and 1586 transitions. [2023-01-28 04:54:24,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 824 flow [2023-01-28 04:54:24,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 755 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-01-28 04:54:24,731 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 532 flow [2023-01-28 04:54:24,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-01-28 04:54:24,732 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-01-28 04:54:24,732 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 532 flow [2023-01-28 04:54:24,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:24,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 04:54:24,733 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)] === [2023-01-28 04:54:24,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1017322832, now seen corresponding path program 1 times [2023-01-28 04:54:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:24,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108021747] [2023-01-28 04:54:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:24,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108021747] [2023-01-28 04:54:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108021747] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:24,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:54:24,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 04:54:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941777408] [2023-01-28 04:54:24,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:54:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:54:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:54:24,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-01-28 04:54:24,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:24,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-01-28 04:54:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:24,997 INFO L130 PetriNetUnfolder]: 804/1266 cut-off events. [2023-01-28 04:54:24,998 INFO L131 PetriNetUnfolder]: For 2099/2107 co-relation queries the response was YES. [2023-01-28 04:54:25,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1266 events. 804/1266 cut-off events. For 2099/2107 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5315 event pairs, 219 based on Foata normal form. 20/1038 useless extension candidates. Maximal degree in co-relation 4841. Up to 576 conditions per place. [2023-01-28 04:54:25,005 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2023-01-28 04:54:25,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 904 flow [2023-01-28 04:54:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:54:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:54:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2023-01-28 04:54:25,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2023-01-28 04:54:25,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2023-01-28 04:54:25,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2023-01-28 04:54:25,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:25,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2023-01-28 04:54:25,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,011 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 532 flow. Second operand 4 states and 800 transitions. [2023-01-28 04:54:25,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 904 flow [2023-01-28 04:54:25,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 842 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-01-28 04:54:25,025 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 640 flow [2023-01-28 04:54:25,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-01-28 04:54:25,026 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2023-01-28 04:54:25,026 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 640 flow [2023-01-28 04:54:25,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:25,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 04:54:25,027 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)] === [2023-01-28 04:54:25,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1082305135, now seen corresponding path program 1 times [2023-01-28 04:54:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138585747] [2023-01-28 04:54:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:25,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:25,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138585747] [2023-01-28 04:54:25,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138585747] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:25,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146630470] [2023-01-28 04:54:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:25,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:25,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:25,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 04:54:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:54:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:25,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146630470] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:25,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 04:54:25,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515763086] [2023-01-28 04:54:25,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:25,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:54:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:54:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:54:25,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 422 [2023-01-28 04:54:25,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 640 flow. Second operand has 12 states, 12 states have (on average 165.16666666666666) internal successors, (1982), 12 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:25,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 422 [2023-01-28 04:54:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:25,745 INFO L130 PetriNetUnfolder]: 1246/1997 cut-off events. [2023-01-28 04:54:25,745 INFO L131 PetriNetUnfolder]: For 4938/4954 co-relation queries the response was YES. [2023-01-28 04:54:25,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8843 conditions, 1997 events. 1246/1997 cut-off events. For 4938/4954 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9188 event pairs, 582 based on Foata normal form. 80/1713 useless extension candidates. Maximal degree in co-relation 8818. Up to 1138 conditions per place. [2023-01-28 04:54:25,759 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2023-01-28 04:54:25,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 1568 flow [2023-01-28 04:54:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:54:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:54:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1033 transitions. [2023-01-28 04:54:25,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079778830963665 [2023-01-28 04:54:25,762 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1033 transitions. [2023-01-28 04:54:25,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1033 transitions. [2023-01-28 04:54:25,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:25,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1033 transitions. [2023-01-28 04:54:25,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,767 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,768 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 640 flow. Second operand 6 states and 1033 transitions. [2023-01-28 04:54:25,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 1568 flow [2023-01-28 04:54:25,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1530 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-01-28 04:54:25,790 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 704 flow [2023-01-28 04:54:25,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-01-28 04:54:25,790 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2023-01-28 04:54:25,790 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 704 flow [2023-01-28 04:54:25,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.16666666666666) internal successors, (1982), 12 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:25,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:25,791 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, 1, 1] [2023-01-28 04:54:25,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 04:54:25,997 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)] === [2023-01-28 04:54:25,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1111418417, now seen corresponding path program 1 times [2023-01-28 04:54:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979716249] [2023-01-28 04:54:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:26,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979716249] [2023-01-28 04:54:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979716249] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893698597] [2023-01-28 04:54:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:26,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:26,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:26,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 04:54:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:54:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893698597] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:26,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:26,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 04:54:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574713155] [2023-01-28 04:54:26,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:26,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:54:26,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:54:26,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:54:26,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 422 [2023-01-28 04:54:26,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 704 flow. Second operand has 12 states, 12 states have (on average 165.25) internal successors, (1983), 12 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:26,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:26,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 422 [2023-01-28 04:54:26,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:26,770 INFO L130 PetriNetUnfolder]: 1736/2875 cut-off events. [2023-01-28 04:54:26,770 INFO L131 PetriNetUnfolder]: For 7604/7636 co-relation queries the response was YES. [2023-01-28 04:54:26,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2875 events. 1736/2875 cut-off events. For 7604/7636 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15170 event pairs, 907 based on Foata normal form. 108/2571 useless extension candidates. Maximal degree in co-relation 12076. Up to 1792 conditions per place. [2023-01-28 04:54:26,791 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 109 selfloop transitions, 6 changer transitions 23/140 dead transitions. [2023-01-28 04:54:26,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1384 flow [2023-01-28 04:54:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:54:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:54:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1033 transitions. [2023-01-28 04:54:26,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079778830963665 [2023-01-28 04:54:26,794 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1033 transitions. [2023-01-28 04:54:26,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1033 transitions. [2023-01-28 04:54:26,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:26,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1033 transitions. [2023-01-28 04:54:26,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:26,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:26,798 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:26,798 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 704 flow. Second operand 6 states and 1033 transitions. [2023-01-28 04:54:26,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1384 flow [2023-01-28 04:54:26,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1332 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-01-28 04:54:26,835 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 761 flow [2023-01-28 04:54:26,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-01-28 04:54:26,836 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-01-28 04:54:26,837 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 761 flow [2023-01-28 04:54:26,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.25) internal successors, (1983), 12 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:26,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:26,837 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, 1, 1] [2023-01-28 04:54:26,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:27,043 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,SelfDestructingSolverStorable11 [2023-01-28 04:54:27,043 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)] === [2023-01-28 04:54:27,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 719392531, now seen corresponding path program 2 times [2023-01-28 04:54:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:27,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183503476] [2023-01-28 04:54:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:27,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:27,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183503476] [2023-01-28 04:54:27,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183503476] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:27,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205522846] [2023-01-28 04:54:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:54:27,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:27,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:27,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 04:54:27,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:27,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 04:54:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:28,082 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 18 treesize of output 20 [2023-01-28 04:54:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:28,146 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 18 treesize of output 20 [2023-01-28 04:54:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:28,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:28,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:28,420 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 167 treesize of output 151 [2023-01-28 04:54:28,429 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 64 treesize of output 58 [2023-01-28 04:54:28,438 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 58 treesize of output 46 [2023-01-28 04:54:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:28,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205522846] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:28,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:28,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-01-28 04:54:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554980266] [2023-01-28 04:54:28,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:28,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 04:54:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 04:54:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=584, Unknown=2, NotChecked=0, Total=702 [2023-01-28 04:54:28,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-01-28 04:54:28,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 761 flow. Second operand has 27 states, 27 states have (on average 137.25925925925927) internal successors, (3706), 27 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:28,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:28,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-01-28 04:54:28,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:31,041 INFO L130 PetriNetUnfolder]: 4258/6745 cut-off events. [2023-01-28 04:54:31,042 INFO L131 PetriNetUnfolder]: For 15540/15612 co-relation queries the response was YES. [2023-01-28 04:54:31,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 6745 events. 4258/6745 cut-off events. For 15540/15612 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 38977 event pairs, 573 based on Foata normal form. 73/5618 useless extension candidates. Maximal degree in co-relation 25991. Up to 2241 conditions per place. [2023-01-28 04:54:31,076 INFO L137 encePairwiseOnDemand]: 410/422 looper letters, 348 selfloop transitions, 118 changer transitions 2/470 dead transitions. [2023-01-28 04:54:31,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 470 transitions, 4003 flow [2023-01-28 04:54:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 04:54:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 04:54:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4773 transitions. [2023-01-28 04:54:31,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274019819043516 [2023-01-28 04:54:31,086 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4773 transitions. [2023-01-28 04:54:31,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4773 transitions. [2023-01-28 04:54:31,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:31,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4773 transitions. [2023-01-28 04:54:31,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 144.63636363636363) internal successors, (4773), 33 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:31,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:31,109 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:31,110 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 761 flow. Second operand 33 states and 4773 transitions. [2023-01-28 04:54:31,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 470 transitions, 4003 flow [2023-01-28 04:54:31,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 470 transitions, 3850 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-01-28 04:54:31,201 INFO L231 Difference]: Finished difference. Result has 134 places, 184 transitions, 1929 flow [2023-01-28 04:54:31,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1929, PETRI_PLACES=134, PETRI_TRANSITIONS=184} [2023-01-28 04:54:31,202 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 102 predicate places. [2023-01-28 04:54:31,202 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 184 transitions, 1929 flow [2023-01-28 04:54:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.25925925925927) internal successors, (3706), 27 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:31,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:31,203 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:31,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 04:54:31,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:31,408 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)] === [2023-01-28 04:54:31,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 568558749, now seen corresponding path program 3 times [2023-01-28 04:54:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:31,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408682279] [2023-01-28 04:54:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:32,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408682279] [2023-01-28 04:54:32,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408682279] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408985837] [2023-01-28 04:54:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:54:32,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:32,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:32,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 04:54:32,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:54:32,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 04:54:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:32,295 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 18 treesize of output 20 [2023-01-28 04:54:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 04:54:32,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:32,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:32,369 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 45 treesize of output 37 [2023-01-28 04:54:32,373 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 24 treesize of output 18 [2023-01-28 04:54:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 04:54:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408985837] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:32,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:32,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-01-28 04:54:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196382464] [2023-01-28 04:54:32,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:54:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:54:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=317, Unknown=6, NotChecked=0, Total=380 [2023-01-28 04:54:32,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 422 [2023-01-28 04:54:32,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 184 transitions, 1929 flow. Second operand has 20 states, 20 states have (on average 140.7) internal successors, (2814), 20 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:32,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:32,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 422 [2023-01-28 04:54:32,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:33,979 INFO L130 PetriNetUnfolder]: 5889/9216 cut-off events. [2023-01-28 04:54:33,980 INFO L131 PetriNetUnfolder]: For 63137/63221 co-relation queries the response was YES. [2023-01-28 04:54:34,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50775 conditions, 9216 events. 5889/9216 cut-off events. For 63137/63221 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 55287 event pairs, 1344 based on Foata normal form. 32/8130 useless extension candidates. Maximal degree in co-relation 50726. Up to 4331 conditions per place. [2023-01-28 04:54:34,040 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 185 selfloop transitions, 118 changer transitions 0/305 dead transitions. [2023-01-28 04:54:34,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 305 transitions, 3537 flow [2023-01-28 04:54:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:54:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:54:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1896 transitions. [2023-01-28 04:54:34,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456069996354357 [2023-01-28 04:54:34,043 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1896 transitions. [2023-01-28 04:54:34,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1896 transitions. [2023-01-28 04:54:34,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:34,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1896 transitions. [2023-01-28 04:54:34,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 145.84615384615384) internal successors, (1896), 13 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:34,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:34,051 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:34,051 INFO L175 Difference]: Start difference. First operand has 134 places, 184 transitions, 1929 flow. Second operand 13 states and 1896 transitions. [2023-01-28 04:54:34,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 305 transitions, 3537 flow [2023-01-28 04:54:34,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 305 transitions, 3281 flow, removed 116 selfloop flow, removed 6 redundant places. [2023-01-28 04:54:34,487 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2360 flow [2023-01-28 04:54:34,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2360, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2023-01-28 04:54:34,488 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2023-01-28 04:54:34,488 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2360 flow [2023-01-28 04:54:34,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 140.7) internal successors, (2814), 20 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:34,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:34,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:34,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:34,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:34,694 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)] === [2023-01-28 04:54:34,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1793127063, now seen corresponding path program 4 times [2023-01-28 04:54:34,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:34,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378680192] [2023-01-28 04:54:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:35,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:35,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378680192] [2023-01-28 04:54:35,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378680192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:35,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490971131] [2023-01-28 04:54:35,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:54:35,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:35,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:35,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 04:54:35,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:54:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 04:54:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:35,912 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 18 treesize of output 20 [2023-01-28 04:54:35,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:35,935 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 18 treesize of output 20 [2023-01-28 04:54:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:54:35,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:36,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:36,099 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 167 treesize of output 151 [2023-01-28 04:54:36,111 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 64 treesize of output 58 [2023-01-28 04:54:36,115 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 58 treesize of output 46 [2023-01-28 04:54:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 04:54:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490971131] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:36,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:36,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 24 [2023-01-28 04:54:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287264673] [2023-01-28 04:54:36,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:54:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:54:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=512, Unknown=6, NotChecked=0, Total=600 [2023-01-28 04:54:36,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-01-28 04:54:36,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2360 flow. Second operand has 25 states, 25 states have (on average 137.28) internal successors, (3432), 25 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:36,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:36,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-01-28 04:54:36,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:38,081 INFO L130 PetriNetUnfolder]: 5860/9167 cut-off events. [2023-01-28 04:54:38,081 INFO L131 PetriNetUnfolder]: For 73491/73577 co-relation queries the response was YES. [2023-01-28 04:54:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51575 conditions, 9167 events. 5860/9167 cut-off events. For 73491/73577 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 54783 event pairs, 1476 based on Foata normal form. 32/8243 useless extension candidates. Maximal degree in co-relation 51525. Up to 3015 conditions per place. [2023-01-28 04:54:38,129 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 149 selfloop transitions, 121 changer transitions 23/295 dead transitions. [2023-01-28 04:54:38,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 295 transitions, 3651 flow [2023-01-28 04:54:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:54:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:54:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1993 transitions. [2023-01-28 04:54:38,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373392010832769 [2023-01-28 04:54:38,132 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1993 transitions. [2023-01-28 04:54:38,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1993 transitions. [2023-01-28 04:54:38,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:38,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1993 transitions. [2023-01-28 04:54:38,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.35714285714286) internal successors, (1993), 14 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:38,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:38,140 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:38,140 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2360 flow. Second operand 14 states and 1993 transitions. [2023-01-28 04:54:38,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 295 transitions, 3651 flow [2023-01-28 04:54:38,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 295 transitions, 3591 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 04:54:38,486 INFO L231 Difference]: Finished difference. Result has 153 places, 214 transitions, 2570 flow [2023-01-28 04:54:38,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2570, PETRI_PLACES=153, PETRI_TRANSITIONS=214} [2023-01-28 04:54:38,486 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 121 predicate places. [2023-01-28 04:54:38,486 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 214 transitions, 2570 flow [2023-01-28 04:54:38,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 137.28) internal successors, (3432), 25 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:38,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:38,487 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, 1] [2023-01-28 04:54:38,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 04:54:38,693 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)] === [2023-01-28 04:54:38,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2109499593, now seen corresponding path program 2 times [2023-01-28 04:54:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812320266] [2023-01-28 04:54:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:38,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:54:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812320266] [2023-01-28 04:54:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812320266] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776943388] [2023-01-28 04:54:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:54:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:38,868 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) [2023-01-28 04:54:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 04:54:39,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:39,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:39,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:54:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:54:39,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 04:54:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776943388] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:54:39,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 04:54:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-01-28 04:54:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49996638] [2023-01-28 04:54:39,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:54:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:54:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:54:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-01-28 04:54:39,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-01-28 04:54:39,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 214 transitions, 2570 flow. Second operand has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:39,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:39,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-01-28 04:54:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:40,095 INFO L130 PetriNetUnfolder]: 5088/7886 cut-off events. [2023-01-28 04:54:40,096 INFO L131 PetriNetUnfolder]: For 70963/71023 co-relation queries the response was YES. [2023-01-28 04:54:40,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48768 conditions, 7886 events. 5088/7886 cut-off events. For 70963/71023 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 44565 event pairs, 934 based on Foata normal form. 208/7024 useless extension candidates. Maximal degree in co-relation 48716. Up to 5259 conditions per place. [2023-01-28 04:54:40,151 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 171 selfloop transitions, 45 changer transitions 45/263 dead transitions. [2023-01-28 04:54:40,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 263 transitions, 3461 flow [2023-01-28 04:54:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:54:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:54:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-01-28 04:54:40,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774881516587678 [2023-01-28 04:54:40,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-01-28 04:54:40,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-01-28 04:54:40,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:40,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-01-28 04:54:40,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:40,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:40,155 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:40,156 INFO L175 Difference]: Start difference. First operand has 153 places, 214 transitions, 2570 flow. Second operand 4 states and 806 transitions. [2023-01-28 04:54:40,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 263 transitions, 3461 flow [2023-01-28 04:54:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 263 transitions, 3299 flow, removed 48 selfloop flow, removed 14 redundant places. [2023-01-28 04:54:40,475 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1885 flow [2023-01-28 04:54:40,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1885, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2023-01-28 04:54:40,475 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 111 predicate places. [2023-01-28 04:54:40,475 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1885 flow [2023-01-28 04:54:40,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:40,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:40,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:40,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 04:54:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 04:54:40,681 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)] === [2023-01-28 04:54:40,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:40,681 INFO L85 PathProgramCache]: Analyzing trace with hash -977138711, now seen corresponding path program 1 times [2023-01-28 04:54:40,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059146503] [2023-01-28 04:54:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:54:41,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059146503] [2023-01-28 04:54:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059146503] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647463575] [2023-01-28 04:54:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:41,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:41,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:41,111 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) [2023-01-28 04:54:41,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 04:54:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:41,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 04:54:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:41,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:41,558 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 04:54:41,558 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 24 treesize of output 11 [2023-01-28 04:54:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:41,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647463575] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:41,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:41,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2023-01-28 04:54:41,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766808602] [2023-01-28 04:54:41,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:41,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 04:54:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:41,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 04:54:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-01-28 04:54:41,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 422 [2023-01-28 04:54:41,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1885 flow. Second operand has 26 states, 26 states have (on average 139.84615384615384) internal successors, (3636), 26 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:41,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:41,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 422 [2023-01-28 04:54:41,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:45,599 INFO L130 PetriNetUnfolder]: 15684/23669 cut-off events. [2023-01-28 04:54:45,600 INFO L131 PetriNetUnfolder]: For 234969/234969 co-relation queries the response was YES. [2023-01-28 04:54:45,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154059 conditions, 23669 events. 15684/23669 cut-off events. For 234969/234969 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 153668 event pairs, 2397 based on Foata normal form. 0/20682 useless extension candidates. Maximal degree in co-relation 154011. Up to 6667 conditions per place. [2023-01-28 04:54:45,796 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 593 selfloop transitions, 171 changer transitions 0/764 dead transitions. [2023-01-28 04:54:45,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 764 transitions, 10722 flow [2023-01-28 04:54:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:54:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:54:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3094 transitions. [2023-01-28 04:54:45,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913112164297 [2023-01-28 04:54:45,800 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3094 transitions. [2023-01-28 04:54:45,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3094 transitions. [2023-01-28 04:54:45,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:45,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3094 transitions. [2023-01-28 04:54:45,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 147.33333333333334) internal successors, (3094), 21 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:45,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 422.0) internal successors, (9284), 22 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:45,809 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 422.0) internal successors, (9284), 22 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:45,809 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1885 flow. Second operand 21 states and 3094 transitions. [2023-01-28 04:54:45,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 764 transitions, 10722 flow [2023-01-28 04:54:47,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 764 transitions, 9658 flow, removed 497 selfloop flow, removed 6 redundant places. [2023-01-28 04:54:47,018 INFO L231 Difference]: Finished difference. Result has 153 places, 347 transitions, 4838 flow [2023-01-28 04:54:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4838, PETRI_PLACES=153, PETRI_TRANSITIONS=347} [2023-01-28 04:54:47,019 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 121 predicate places. [2023-01-28 04:54:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 347 transitions, 4838 flow [2023-01-28 04:54:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.84615384615384) internal successors, (3636), 26 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:47,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:47,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:47,226 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)] === [2023-01-28 04:54:47,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1818543657, now seen corresponding path program 2 times [2023-01-28 04:54:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:47,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239466275] [2023-01-28 04:54:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:54:47,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:47,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239466275] [2023-01-28 04:54:47,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239466275] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:47,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625068411] [2023-01-28 04:54:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:54:47,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:47,686 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) [2023-01-28 04:54:47,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 04:54:47,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:47,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 04:54:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:48,080 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 19 treesize of output 21 [2023-01-28 04:54:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:54:48,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:48,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:48,390 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 44 treesize of output 36 [2023-01-28 04:54:48,393 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 24 treesize of output 18 [2023-01-28 04:54:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:54:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625068411] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:48,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 04:54:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258535095] [2023-01-28 04:54:48,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:48,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:54:48,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:54:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-01-28 04:54:48,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 422 [2023-01-28 04:54:48,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 347 transitions, 4838 flow. Second operand has 25 states, 25 states have (on average 141.84) internal successors, (3546), 25 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:48,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:48,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 422 [2023-01-28 04:54:48,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:56,720 INFO L130 PetriNetUnfolder]: 27350/41636 cut-off events. [2023-01-28 04:54:56,720 INFO L131 PetriNetUnfolder]: For 641039/641159 co-relation queries the response was YES. [2023-01-28 04:54:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277745 conditions, 41636 events. 27350/41636 cut-off events. For 641039/641159 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 294735 event pairs, 4535 based on Foata normal form. 1066/42556 useless extension candidates. Maximal degree in co-relation 277688. Up to 9022 conditions per place. [2023-01-28 04:54:57,337 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 1052 selfloop transitions, 245 changer transitions 2/1303 dead transitions. [2023-01-28 04:54:57,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 1303 transitions, 19835 flow [2023-01-28 04:54:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 04:54:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 04:54:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3868 transitions. [2023-01-28 04:54:57,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253372220196866 [2023-01-28 04:54:57,342 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3868 transitions. [2023-01-28 04:54:57,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3868 transitions. [2023-01-28 04:54:57,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:57,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3868 transitions. [2023-01-28 04:54:57,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 148.76923076923077) internal successors, (3868), 26 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 422.0) internal successors, (11394), 27 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,354 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 422.0) internal successors, (11394), 27 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,355 INFO L175 Difference]: Start difference. First operand has 153 places, 347 transitions, 4838 flow. Second operand 26 states and 3868 transitions. [2023-01-28 04:54:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 1303 transitions, 19835 flow [2023-01-28 04:55:01,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1303 transitions, 19096 flow, removed 357 selfloop flow, removed 4 redundant places. [2023-01-28 04:55:01,887 INFO L231 Difference]: Finished difference. Result has 184 places, 490 transitions, 7729 flow [2023-01-28 04:55:01,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7729, PETRI_PLACES=184, PETRI_TRANSITIONS=490} [2023-01-28 04:55:01,887 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2023-01-28 04:55:01,887 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 490 transitions, 7729 flow [2023-01-28 04:55:01,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 141.84) internal successors, (3546), 25 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:01,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:55:01,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:55:01,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 04:55:02,088 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,SelfDestructingSolverStorable17 [2023-01-28 04:55:02,089 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)] === [2023-01-28 04:55:02,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:55:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash -904786089, now seen corresponding path program 3 times [2023-01-28 04:55:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:55:02,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168280782] [2023-01-28 04:55:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:02,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:55:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:55:02,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:55:02,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168280782] [2023-01-28 04:55:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168280782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:55:02,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630225233] [2023-01-28 04:55:02,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:55:02,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:02,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:55:02,513 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) [2023-01-28 04:55:02,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 04:55:02,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:55:02,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:55:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 04:55:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:55:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:55:02,853 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 20 treesize of output 22 [2023-01-28 04:55:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 04:55:02,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:55:02,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:02,995 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 44 treesize of output 36 [2023-01-28 04:55:02,998 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 24 treesize of output 18 [2023-01-28 04:55:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 04:55:03,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630225233] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:55:03,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:55:03,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-01-28 04:55:03,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394910496] [2023-01-28 04:55:03,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:55:03,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:55:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:55:03,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:55:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:55:03,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 422 [2023-01-28 04:55:03,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 490 transitions, 7729 flow. Second operand has 19 states, 19 states have (on average 142.57894736842104) internal successors, (2709), 19 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:03,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:55:03,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 422 [2023-01-28 04:55:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:55:10,148 INFO L130 PetriNetUnfolder]: 26636/40174 cut-off events. [2023-01-28 04:55:10,149 INFO L131 PetriNetUnfolder]: For 741520/741620 co-relation queries the response was YES. [2023-01-28 04:55:10,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280688 conditions, 40174 events. 26636/40174 cut-off events. For 741520/741620 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 275229 event pairs, 6164 based on Foata normal form. 862/40886 useless extension candidates. Maximal degree in co-relation 280621. Up to 14217 conditions per place. [2023-01-28 04:55:10,692 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 665 selfloop transitions, 69 changer transitions 0/738 dead transitions. [2023-01-28 04:55:10,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 738 transitions, 12253 flow [2023-01-28 04:55:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:55:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:55:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1623 transitions. [2023-01-28 04:55:10,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496337785437312 [2023-01-28 04:55:10,695 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1623 transitions. [2023-01-28 04:55:10,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1623 transitions. [2023-01-28 04:55:10,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:55:10,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1623 transitions. [2023-01-28 04:55:10,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 147.54545454545453) internal successors, (1623), 11 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:10,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 422.0) internal successors, (5064), 12 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:10,700 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 422.0) internal successors, (5064), 12 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:10,700 INFO L175 Difference]: Start difference. First operand has 184 places, 490 transitions, 7729 flow. Second operand 11 states and 1623 transitions. [2023-01-28 04:55:10,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 738 transitions, 12253 flow [2023-01-28 04:55:17,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 738 transitions, 11748 flow, removed 222 selfloop flow, removed 10 redundant places. [2023-01-28 04:55:17,256 INFO L231 Difference]: Finished difference. Result has 184 places, 476 transitions, 7088 flow [2023-01-28 04:55:17,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6764, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7088, PETRI_PLACES=184, PETRI_TRANSITIONS=476} [2023-01-28 04:55:17,256 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2023-01-28 04:55:17,256 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 476 transitions, 7088 flow [2023-01-28 04:55:17,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.57894736842104) internal successors, (2709), 19 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:17,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:55:17,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:55:17,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 04:55:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:17,461 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)] === [2023-01-28 04:55:17,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:55:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 769622630, now seen corresponding path program 1 times [2023-01-28 04:55:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:55:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065647643] [2023-01-28 04:55:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:55:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:19,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:55:19,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065647643] [2023-01-28 04:55:19,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065647643] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:55:19,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427979979] [2023-01-28 04:55:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:19,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:19,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:55:19,823 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) [2023-01-28 04:55:19,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 04:55:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:20,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 70 conjunts are in the unsatisfiable core [2023-01-28 04:55:20,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:55:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:55:20,312 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 18 treesize of output 20 [2023-01-28 04:55:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:55:20,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:55:25,580 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 04:55:27,598 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 04:55:59,792 WARN L222 SmtUtils]: Spent 32.09s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:56:04,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:04,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 382 treesize of output 509 [2023-01-28 04:56:04,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:04,863 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 265 treesize of output 276 [2023-01-28 04:56:04,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:04,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 235 treesize of output 228 [2023-01-28 04:56:04,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:04,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 211 treesize of output 204 [2023-01-28 04:56:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-01-28 04:56:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427979979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:09,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:09,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 42 [2023-01-28 04:56:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798109875] [2023-01-28 04:56:09,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:09,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 04:56:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 04:56:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1611, Unknown=3, NotChecked=162, Total=1892 [2023-01-28 04:56:09,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 422 [2023-01-28 04:56:09,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 476 transitions, 7088 flow. Second operand has 44 states, 44 states have (on average 109.97727272727273) internal successors, (4839), 44 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:09,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:09,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 422 [2023-01-28 04:56:09,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:26,452 WARN L222 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 80 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:56:57,317 WARN L222 SmtUtils]: Spent 26.12s on a formula simplification. DAG size of input: 83 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:57:07,690 INFO L130 PetriNetUnfolder]: 27797/42219 cut-off events. [2023-01-28 04:57:07,691 INFO L131 PetriNetUnfolder]: For 679815/679815 co-relation queries the response was YES. [2023-01-28 04:57:08,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291750 conditions, 42219 events. 27797/42219 cut-off events. For 679815/679815 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 294361 event pairs, 8795 based on Foata normal form. 4/42085 useless extension candidates. Maximal degree in co-relation 291686. Up to 39328 conditions per place. [2023-01-28 04:57:08,183 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 544 selfloop transitions, 128 changer transitions 3/675 dead transitions. [2023-01-28 04:57:08,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 675 transitions, 10350 flow [2023-01-28 04:57:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 04:57:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 04:57:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3320 transitions. [2023-01-28 04:57:08,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27128615786893284 [2023-01-28 04:57:08,187 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3320 transitions. [2023-01-28 04:57:08,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3320 transitions. [2023-01-28 04:57:08,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:57:08,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3320 transitions. [2023-01-28 04:57:08,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 114.48275862068965) internal successors, (3320), 29 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:08,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:08,199 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:08,199 INFO L175 Difference]: Start difference. First operand has 184 places, 476 transitions, 7088 flow. Second operand 29 states and 3320 transitions. [2023-01-28 04:57:08,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 675 transitions, 10350 flow [2023-01-28 04:57:13,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 675 transitions, 10132 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-01-28 04:57:13,264 INFO L231 Difference]: Finished difference. Result has 214 places, 565 transitions, 8754 flow [2023-01-28 04:57:13,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8754, PETRI_PLACES=214, PETRI_TRANSITIONS=565} [2023-01-28 04:57:13,265 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 182 predicate places. [2023-01-28 04:57:13,265 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 565 transitions, 8754 flow [2023-01-28 04:57:13,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 109.97727272727273) internal successors, (4839), 44 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:13,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:57:13,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:57:13,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 04:57:13,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:13,466 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)] === [2023-01-28 04:57:13,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:57:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1119676476, now seen corresponding path program 2 times [2023-01-28 04:57:13,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:57:13,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977513224] [2023-01-28 04:57:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:57:13,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:57:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:57:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:15,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:57:15,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977513224] [2023-01-28 04:57:15,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977513224] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:57:15,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743313484] [2023-01-28 04:57:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:57:15,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:57:15,328 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) [2023-01-28 04:57:15,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 04:57:15,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:57:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:57:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-28 04:57:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:57:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:57:17,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:57:20,486 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 04:57:52,687 WARN L222 SmtUtils]: Spent 32.10s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:58:26,884 WARN L222 SmtUtils]: Spent 30.12s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:58:26,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:26,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 293 [2023-01-28 04:58:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-01-28 04:58:30,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743313484] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:30,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:30,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 37 [2023-01-28 04:58:30,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501707922] [2023-01-28 04:58:30,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:30,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 04:58:30,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 04:58:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1303, Unknown=3, NotChecked=72, Total=1482 [2023-01-28 04:58:30,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 04:58:30,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 565 transitions, 8754 flow. Second operand has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:30,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:30,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 04:58:30,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:37,796 WARN L222 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 81 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:58:46,402 INFO L130 PetriNetUnfolder]: 28670/43613 cut-off events. [2023-01-28 04:58:46,402 INFO L131 PetriNetUnfolder]: For 710374/710374 co-relation queries the response was YES. [2023-01-28 04:58:46,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309417 conditions, 43613 events. 28670/43613 cut-off events. For 710374/710374 co-relation queries the response was YES. Maximal size of possible extension queue 1429. Compared 307099 event pairs, 9473 based on Foata normal form. 4/43479 useless extension candidates. Maximal degree in co-relation 309345. Up to 41559 conditions per place. [2023-01-28 04:58:47,047 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 628 selfloop transitions, 132 changer transitions 3/763 dead transitions. [2023-01-28 04:58:47,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 763 transitions, 12351 flow [2023-01-28 04:58:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 04:58:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 04:58:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3447 transitions. [2023-01-28 04:58:47,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28166367053440106 [2023-01-28 04:58:47,051 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3447 transitions. [2023-01-28 04:58:47,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3447 transitions. [2023-01-28 04:58:47,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:47,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3447 transitions. [2023-01-28 04:58:47,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 118.86206896551724) internal successors, (3447), 29 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:47,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:47,060 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:47,060 INFO L175 Difference]: Start difference. First operand has 214 places, 565 transitions, 8754 flow. Second operand 29 states and 3447 transitions. [2023-01-28 04:58:47,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 763 transitions, 12351 flow [2023-01-28 04:58:54,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 763 transitions, 11861 flow, removed 235 selfloop flow, removed 5 redundant places. [2023-01-28 04:58:54,459 INFO L231 Difference]: Finished difference. Result has 249 places, 651 transitions, 10294 flow [2023-01-28 04:58:54,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=8312, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10294, PETRI_PLACES=249, PETRI_TRANSITIONS=651} [2023-01-28 04:58:54,459 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 217 predicate places. [2023-01-28 04:58:54,459 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 651 transitions, 10294 flow [2023-01-28 04:58:54,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:54,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:54,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:54,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:54,660 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,SelfDestructingSolverStorable20 [2023-01-28 04:58:54,661 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)] === [2023-01-28 04:58:54,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:54,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2424118, now seen corresponding path program 3 times [2023-01-28 04:58:54,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:54,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503672653] [2023-01-28 04:58:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:57,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503672653] [2023-01-28 04:58:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503672653] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998549182] [2023-01-28 04:58:57,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:58:57,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:57,227 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) [2023-01-28 04:58:57,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 04:58:57,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:58:57,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 95 conjunts are in the unsatisfiable core [2023-01-28 04:58:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:58:57,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:58:57,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:57,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:57,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:58,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:00,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:00,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 85 [2023-01-28 04:59:00,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:00,765 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 14197 treesize of output 13187 [2023-01-28 04:59:00,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:00,943 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 1703 treesize of output 1539 [2023-01-28 04:59:00,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:00,978 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 1499 treesize of output 1131 [2023-01-28 04:59:01,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:01,013 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 1091 treesize of output 1029 [2023-01-28 04:59:15,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:15,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 105 [2023-01-28 04:59:15,339 INFO L321 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-01-28 04:59:15,340 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 57030 treesize of output 52878 [2023-01-28 04:59:15,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:15,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1773 treesize of output 1421 [2023-01-28 04:59:15,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:15,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1360 treesize of output 1224 [2023-01-28 04:59:15,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:15,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1144 treesize of output 1116 [2023-01-28 05:00:07,624 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-28 05:00:07,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 1 [2023-01-28 05:00:07,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:07,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 85 [2023-01-28 05:00:07,690 INFO L321 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2023-01-28 05:00:07,690 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 14845 treesize of output 13780 [2023-01-28 05:00:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:00:07,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:07,882 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 1703 treesize of output 1311 [2023-01-28 05:00:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:00:07,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:07,923 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 1295 treesize of output 1107 [2023-01-28 05:00:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:00:07,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:07,966 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 1091 treesize of output 1005 [2023-01-28 05:00:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:00:13,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998549182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:13,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:13,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 51 [2023-01-28 05:00:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709794619] [2023-01-28 05:00:13,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-01-28 05:00:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-01-28 05:00:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2498, Unknown=20, NotChecked=0, Total=2756 [2023-01-28 05:00:13,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 422 [2023-01-28 05:00:13,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 651 transitions, 10294 flow. Second operand has 53 states, 53 states have (on average 102.67924528301887) internal successors, (5442), 53 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:00:13,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:13,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 422 [2023-01-28 05:00:13,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:00:26,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 05:01:06,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:01:21,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:01:23,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:01:27,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:01:41,035 INFO L130 PetriNetUnfolder]: 40353/61146 cut-off events. [2023-01-28 05:01:41,036 INFO L131 PetriNetUnfolder]: For 1078020/1078020 co-relation queries the response was YES. [2023-01-28 05:01:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454943 conditions, 61146 events. 40353/61146 cut-off events. For 1078020/1078020 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 451080 event pairs, 6389 based on Foata normal form. 12/61020 useless extension candidates. Maximal degree in co-relation 454858. Up to 28281 conditions per place. [2023-01-28 05:01:41,979 INFO L137 encePairwiseOnDemand]: 401/422 looper letters, 819 selfloop transitions, 753 changer transitions 12/1584 dead transitions. [2023-01-28 05:01:41,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1584 transitions, 25756 flow [2023-01-28 05:01:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-28 05:01:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-01-28 05:01:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 6791 transitions. [2023-01-28 05:01:41,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2595551138969577 [2023-01-28 05:01:41,992 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 6791 transitions. [2023-01-28 05:01:41,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 6791 transitions. [2023-01-28 05:01:41,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:01:41,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 6791 transitions. [2023-01-28 05:01:42,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 109.53225806451613) internal successors, (6791), 62 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:01:42,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 422.0) internal successors, (26586), 63 states have internal predecessors, (26586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:01:42,016 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 422.0) internal successors, (26586), 63 states have internal predecessors, (26586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:01:42,016 INFO L175 Difference]: Start difference. First operand has 249 places, 651 transitions, 10294 flow. Second operand 62 states and 6791 transitions. [2023-01-28 05:01:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1584 transitions, 25756 flow [2023-01-28 05:01:53,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1584 transitions, 24972 flow, removed 340 selfloop flow, removed 9 redundant places. [2023-01-28 05:01:53,740 INFO L231 Difference]: Finished difference. Result has 327 places, 1200 transitions, 22958 flow [2023-01-28 05:01:53,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9729, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=22958, PETRI_PLACES=327, PETRI_TRANSITIONS=1200} [2023-01-28 05:01:53,741 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 295 predicate places. [2023-01-28 05:01:53,741 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1200 transitions, 22958 flow [2023-01-28 05:01:53,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 102.67924528301887) internal successors, (5442), 53 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:01:53,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:01:53,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:01:53,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 05:01:53,942 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,SelfDestructingSolverStorable21 [2023-01-28 05:01:53,942 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)] === [2023-01-28 05:01:53,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:01:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash -537167506, now seen corresponding path program 4 times [2023-01-28 05:01:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:01:53,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484597703] [2023-01-28 05:01:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:01:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:01:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:01:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:01:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484597703] [2023-01-28 05:01:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484597703] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:01:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171550615] [2023-01-28 05:01:55,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:01:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:01:55,917 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) [2023-01-28 05:01:55,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 05:01:56,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:01:56,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:01:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 05:01:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:01:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:01:57,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:01:58,093 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-01-28 05:01:58,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 249 [2023-01-28 05:01:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:01:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171550615] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:59,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:59,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2023-01-28 05:01:59,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888865330] [2023-01-28 05:01:59,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 05:01:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 05:01:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 05:01:59,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 05:01:59,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1200 transitions, 22958 flow. Second operand has 46 states, 46 states have (on average 113.91304347826087) internal successors, (5240), 46 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:01:59,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:59,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 05:01:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:40,622 WARN L222 SmtUtils]: Spent 29.03s on a formula simplification. DAG size of input: 120 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:02:46,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:03:03,435 WARN L222 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 104 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:03:25,645 INFO L130 PetriNetUnfolder]: 43068/65691 cut-off events. [2023-01-28 05:03:25,645 INFO L131 PetriNetUnfolder]: For 1608640/1608640 co-relation queries the response was YES. [2023-01-28 05:03:26,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583565 conditions, 65691 events. 43068/65691 cut-off events. For 1608640/1608640 co-relation queries the response was YES. Maximal size of possible extension queue 2361. Compared 495293 event pairs, 6249 based on Foata normal form. 8/65550 useless extension candidates. Maximal degree in co-relation 583455. Up to 26693 conditions per place. [2023-01-28 05:03:27,021 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 849 selfloop transitions, 950 changer transitions 18/1817 dead transitions. [2023-01-28 05:03:27,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1817 transitions, 35881 flow [2023-01-28 05:03:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-28 05:03:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-28 05:03:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6833 transitions. [2023-01-28 05:03:27,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28406917768354534 [2023-01-28 05:03:27,027 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6833 transitions. [2023-01-28 05:03:27,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6833 transitions. [2023-01-28 05:03:27,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:27,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6833 transitions. [2023-01-28 05:03:27,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 119.87719298245614) internal successors, (6833), 57 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:27,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 422.0) internal successors, (24476), 58 states have internal predecessors, (24476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:27,045 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 422.0) internal successors, (24476), 58 states have internal predecessors, (24476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:27,045 INFO L175 Difference]: Start difference. First operand has 327 places, 1200 transitions, 22958 flow. Second operand 57 states and 6833 transitions. [2023-01-28 05:03:27,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1817 transitions, 35881 flow [2023-01-28 05:04:00,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1817 transitions, 32675 flow, removed 1573 selfloop flow, removed 14 redundant places. [2023-01-28 05:04:00,473 INFO L231 Difference]: Finished difference. Result has 388 places, 1481 transitions, 29127 flow [2023-01-28 05:04:00,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=20932, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=29127, PETRI_PLACES=388, PETRI_TRANSITIONS=1481} [2023-01-28 05:04:00,473 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 356 predicate places. [2023-01-28 05:04:00,473 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1481 transitions, 29127 flow [2023-01-28 05:04:00,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 113.91304347826087) internal successors, (5240), 46 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:04:00,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:04:00,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:04:00,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 05:04:00,675 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,SelfDestructingSolverStorable22 [2023-01-28 05:04:00,675 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)] === [2023-01-28 05:04:00,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:04:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1540089990, now seen corresponding path program 5 times [2023-01-28 05:04:00,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:04:00,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548222006] [2023-01-28 05:04:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:04:00,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:04:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:04:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:04:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:04:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548222006] [2023-01-28 05:04:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548222006] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:04:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750694352] [2023-01-28 05:04:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:04:02,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:04:02,334 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) [2023-01-28 05:04:02,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 05:04:02,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:04:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:04:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 87 conjunts are in the unsatisfiable core [2023-01-28 05:04:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:04:03,697 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-01-28 05:04:03,697 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 42 treesize of output 13 [2023-01-28 05:04:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:04:03,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:04:04,981 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-01-28 05:04:04,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 249 [2023-01-28 05:04:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:04:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750694352] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:04:06,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:04:06,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-01-28 05:04:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362751952] [2023-01-28 05:04:06,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:04:06,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-01-28 05:04:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:04:06,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-01-28 05:04:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2023-01-28 05:04:06,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 05:04:06,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1481 transitions, 29127 flow. Second operand has 50 states, 50 states have (on average 113.8) internal successors, (5690), 50 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:04:06,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:04:06,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 05:04:06,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:04:32,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:04:41,053 WARN L222 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 88 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:05:14,890 WARN L222 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:05:22,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:05:39,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:05:43,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:05:48,275 INFO L130 PetriNetUnfolder]: 45496/69612 cut-off events. [2023-01-28 05:05:48,276 INFO L131 PetriNetUnfolder]: For 1811467/1811467 co-relation queries the response was YES. [2023-01-28 05:05:49,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633462 conditions, 69612 events. 45496/69612 cut-off events. For 1811467/1811467 co-relation queries the response was YES. Maximal size of possible extension queue 2413. Compared 529842 event pairs, 4279 based on Foata normal form. 7/69469 useless extension candidates. Maximal degree in co-relation 633335. Up to 25125 conditions per place. [2023-01-28 05:05:49,846 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 967 selfloop transitions, 1362 changer transitions 17/2346 dead transitions. [2023-01-28 05:05:49,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2346 transitions, 46115 flow [2023-01-28 05:05:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 05:05:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 05:05:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 7816 transitions. [2023-01-28 05:05:49,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2849434925264309 [2023-01-28 05:05:49,853 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 7816 transitions. [2023-01-28 05:05:49,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 7816 transitions. [2023-01-28 05:05:49,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:05:49,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 7816 transitions. [2023-01-28 05:05:49,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 120.24615384615385) internal successors, (7816), 65 states have internal predecessors, (7816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:49,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 422.0) internal successors, (27852), 66 states have internal predecessors, (27852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:49,879 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 422.0) internal successors, (27852), 66 states have internal predecessors, (27852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:49,879 INFO L175 Difference]: Start difference. First operand has 388 places, 1481 transitions, 29127 flow. Second operand 65 states and 7816 transitions. [2023-01-28 05:05:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2346 transitions, 46115 flow [2023-01-28 05:06:39,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2346 transitions, 43980 flow, removed 953 selfloop flow, removed 21 redundant places. [2023-01-28 05:06:39,764 INFO L231 Difference]: Finished difference. Result has 457 places, 1884 transitions, 39176 flow [2023-01-28 05:06:39,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=27513, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=39176, PETRI_PLACES=457, PETRI_TRANSITIONS=1884} [2023-01-28 05:06:39,765 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 425 predicate places. [2023-01-28 05:06:39,765 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1884 transitions, 39176 flow [2023-01-28 05:06:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 113.8) internal successors, (5690), 50 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:39,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:39,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:39,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 05:06:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:39,967 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)] === [2023-01-28 05:06:39,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash 447616768, now seen corresponding path program 6 times [2023-01-28 05:06:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420580439] [2023-01-28 05:06:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420580439] [2023-01-28 05:06:41,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420580439] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400314444] [2023-01-28 05:06:41,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:06:41,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:41,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:41,655 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) [2023-01-28 05:06:41,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 05:06:42,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 05:06:42,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:42,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 05:06:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:06:42,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:45,433 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 05:07:17,618 WARN L222 SmtUtils]: Spent 32.06s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:07:17,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:07:17,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 293 [2023-01-28 05:07:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 05:07:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400314444] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:19,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:19,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 42 [2023-01-28 05:07:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031517153] [2023-01-28 05:07:19,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:19,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 05:07:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 05:07:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1653, Unknown=1, NotChecked=82, Total=1892 [2023-01-28 05:07:19,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 05:07:19,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1884 transitions, 39176 flow. Second operand has 44 states, 44 states have (on average 114.0) internal successors, (5016), 44 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:19,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:19,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 05:07:19,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:37,065 WARN L222 SmtUtils]: Spent 12.65s on a formula simplification. DAG size of input: 120 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:07:55,400 WARN L222 SmtUtils]: Spent 18.23s on a formula simplification. DAG size of input: 101 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:07:57,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-01-28 05:07:57,537 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:07:57,537 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 [2023-01-28 05:07:58,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:58,738 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-01-28 05:07:58,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2023-01-28 05:07:58,772 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 05:07:58,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-01-28 05:07:58,772 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-01-28 05:07:58,773 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 05:07:58,773 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 05:07:58,773 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 05:07:58,774 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 4, 3, 2, 1, 1, 1, 1] [2023-01-28 05:07:58,775 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:07:58,775 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:07:58,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:07:58 BasicIcfg [2023-01-28 05:07:58,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:07:58,777 INFO L158 Benchmark]: Toolchain (without parser) took 826265.96ms. Allocated memory was 360.7MB in the beginning and 7.4GB in the end (delta: 7.1GB). Free memory was 311.8MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-01-28 05:07:58,777 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. [2023-01-28 05:07:58,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.09ms. Allocated memory is still 360.7MB. Free memory was 311.5MB in the beginning and 299.4MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 05:07:58,778 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.13ms. Allocated memory is still 360.7MB. Free memory was 299.4MB in the beginning and 296.9MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-28 05:07:58,778 INFO L158 Benchmark]: Boogie Preprocessor took 22.78ms. Allocated memory is still 360.7MB. Free memory was 296.9MB in the beginning and 295.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:07:58,778 INFO L158 Benchmark]: RCFGBuilder took 569.31ms. Allocated memory is still 360.7MB. Free memory was 294.8MB in the beginning and 308.8MB in the end (delta: -14.0MB). Peak memory consumption was 13.5MB. Max. memory is 16.0GB. [2023-01-28 05:07:58,778 INFO L158 Benchmark]: TraceAbstraction took 825428.87ms. Allocated memory was 360.7MB in the beginning and 7.4GB in the end (delta: 7.1GB). Free memory was 308.1MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-01-28 05:07:58,779 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 211.09ms. Allocated memory is still 360.7MB. Free memory was 311.5MB in the beginning and 299.4MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.13ms. Allocated memory is still 360.7MB. Free memory was 299.4MB in the beginning and 296.9MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.78ms. Allocated memory is still 360.7MB. Free memory was 296.9MB in the beginning and 295.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 569.31ms. Allocated memory is still 360.7MB. Free memory was 294.8MB in the beginning and 308.8MB in the end (delta: -14.0MB). Peak memory consumption was 13.5MB. Max. memory is 16.0GB. * TraceAbstraction took 825428.87ms. Allocated memory was 360.7MB in the beginning and 7.4GB in the end (delta: 7.1GB). Free memory was 308.1MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.9s, 193 PlacesBefore, 32 PlacesAfterwards, 201 TransitionsBefore, 28 TransitionsAfterwards, 1880 CoEnabledTransitionPairs, 8 FixpointIterations, 123 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 27 TrivialYvCompositions, 11 ConcurrentYvCompositions, 12 ChoiceCompositions, 208 TotalNumberOfCompositions, 2630 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2077, independent: 2012, independent conditional: 0, independent unconditional: 2012, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1054, independent: 1034, independent conditional: 0, independent unconditional: 1034, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2077, independent: 978, independent conditional: 0, independent unconditional: 978, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 1054, unknown conditional: 0, unknown unconditional: 1054] , Statistics on independence cache: Total cache size (in pairs): 70, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 135]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 129]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 233 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: 825.3s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 545.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.0s, HoareTripleCheckerStatistics: 55 mSolverCounterUnknown, 3827 SdHoareTripleChecker+Valid, 65.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3827 mSDsluCounter, 202 SdHoareTripleChecker+Invalid, 62.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 597 IncrementalHoareTripleChecker+Unchecked, 190 mSDsCounter, 776 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25744 IncrementalHoareTripleChecker+Invalid, 27173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 776 mSolverCounterUnsat, 12 mSDtfsCounter, 25744 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1296 GetRequests, 554 SyntacticMatches, 11 SemanticMatches, 731 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 9862 ImplicationChecksByTransitivity, 422.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39176occurred in iteration=24, InterpolantAutomatonStates: 433, 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, 2.3s SatisfiabilityAnalysisTime, 266.8s InterpolantComputationTime, 1085 NumberOfCodeBlocks, 1084 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1429 ConstructedInterpolants, 169 QuantifiedInterpolants, 39712 SizeOfPredicates, 275 NumberOfNonLiveVariables, 5412 ConjunctsInSsa, 657 ConjunctsInUnsatCore, 54 InterpolantComputations, 11 PerfectInterpolantSequences, 138/373 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