/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:42:18,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:42:18,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:42:18,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:42:18,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:42:18,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:42:18,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:42:18,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:42:18,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:42:18,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:42:18,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:42:18,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:42:18,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:42:18,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:42:18,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:42:18,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:42:18,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:42:18,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:42:18,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:42:18,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:42:18,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:42:18,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:42:18,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:42:18,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:42:18,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 06:42:18,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 06:42:18,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 06:42:18,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 06:42:18,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 06:42:18,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 06:42:18,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:42:18,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:42:18,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:42:18,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:42:18,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:42:18,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:42:18,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:42:18,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:42:18,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:42:18,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:42:18,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:42:18,737 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 06:42:18,768 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:42:18,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:42:18,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:42:18,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:42:18,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:42:18,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:42:18,770 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:42:18,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:42:18,770 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:42:18,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:42:18,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:42:18,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:42:18,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:42:18,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:42:18,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:42:18,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:42:18,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:42:18,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:42:18,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:42:18,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:42:18,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:42:18,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:42:18,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:42:18,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:42:18,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:42:18,774 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:42:18,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:42:18,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:42:18,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:42:18,983 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:42:18,986 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:42:18,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-01-28 06:42:20,097 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:42:20,306 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:42:20,306 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-01-28 06:42:20,318 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07240ce48/14d01ecd7fa448bf8bde8562269c101d/FLAG3260a09b8 [2023-01-28 06:42:20,329 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07240ce48/14d01ecd7fa448bf8bde8562269c101d [2023-01-28 06:42:20,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:42:20,332 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:42:20,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:42:20,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:42:20,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:42:20,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3d8664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20, skipping insertion in model container [2023-01-28 06:42:20,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:42:20,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:42:20,522 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-28 06:42:20,636 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2023-01-28 06:42:20,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:42:20,659 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:42:20,674 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-28 06:42:20,724 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2023-01-28 06:42:20,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:42:20,750 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 06:42:20,750 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 06:42:20,750 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 06:42:20,755 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:42:20,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20 WrapperNode [2023-01-28 06:42:20,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:42:20,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:42:20,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:42:20,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:42:20,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,790 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 76 [2023-01-28 06:42:20,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:42:20,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:42:20,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:42:20,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:42:20,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:42:20,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:42:20,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:42:20,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:42:20,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (1/1) ... [2023-01-28 06:42:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:42:20,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:42:20,842 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 06:42:20,843 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 06:42:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 06:42:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 06:42:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:42:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 06:42:20,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:42:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:42:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:42:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:42:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 06:42:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:42:20,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:42:20,871 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 06:42:20,973 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:42:20,975 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:42:21,155 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:42:21,184 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:42:21,184 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 06:42:21,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:42:21 BoogieIcfgContainer [2023-01-28 06:42:21,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:42:21,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:42:21,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:42:21,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:42:21,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:42:20" (1/3) ... [2023-01-28 06:42:21,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8c96e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:42:21, skipping insertion in model container [2023-01-28 06:42:21,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:42:20" (2/3) ... [2023-01-28 06:42:21,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8c96e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:42:21, skipping insertion in model container [2023-01-28 06:42:21,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:42:21" (3/3) ... [2023-01-28 06:42:21,192 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-01-28 06:42:21,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:42:21,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:42:21,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:42:21,262 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:42:21,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:21,320 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2023-01-28 06:42:21,320 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:21,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-01-28 06:42:21,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:21,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:21,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:21,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:21,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:21,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:21,356 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2023-01-28 06:42:21,356 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:21,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-01-28 06:42:21,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-01-28 06:42:23,001 INFO L134 LiptonReduction]: Checked pairs total: 751 [2023-01-28 06:42:23,002 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-01-28 06:42:23,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:42:23,019 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:23,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:42:23,024 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-28 06:42:23,024 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:23,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:23,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:42:23,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:42:23,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 9800033, now seen corresponding path program 1 times [2023-01-28 06:42:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:23,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409115239] [2023-01-28 06:42:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:23,190 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 06:42:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409115239] [2023-01-28 06:42:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409115239] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:23,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:42:23,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942585784] [2023-01-28 06:42:23,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:23,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:23,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:23,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 123 [2023-01-28 06:42:23,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 06:42:23,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:23,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 123 [2023-01-28 06:42:23,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:23,270 INFO L130 PetriNetUnfolder]: 7/20 cut-off events. [2023-01-28 06:42:23,270 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:23,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 2 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2023-01-28 06:42:23,271 INFO L137 encePairwiseOnDemand]: 119/123 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-01-28 06:42:23,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 43 flow [2023-01-28 06:42:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-01-28 06:42:23,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2023-01-28 06:42:23,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-01-28 06:42:23,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-01-28 06:42:23,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:23,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-01-28 06:42:23,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 06:42:23,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 06:42:23,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 06:42:23,298 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 3 states and 165 transitions. [2023-01-28 06:42:23,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 43 flow [2023-01-28 06:42:23,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 43 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:42:23,300 INFO L231 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2023-01-28 06:42:23,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=12, PETRI_TRANSITIONS=0} [2023-01-28 06:42:23,305 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2023-01-28 06:42:23,305 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 0 transitions, 0 flow [2023-01-28 06:42:23,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 06:42:23,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 06:42:23,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 06:42:23,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:42:23,308 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:42:23,313 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 06:42:23,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:23,341 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2023-01-28 06:42:23,341 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-01-28 06:42:23,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:23,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:23,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:23,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:23,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 129 flow [2023-01-28 06:42:23,363 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2023-01-28 06:42:23,363 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:23,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2023-01-28 06:42:23,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-01-28 06:42:24,786 INFO L134 LiptonReduction]: Checked pairs total: 792 [2023-01-28 06:42:24,786 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-01-28 06:42:24,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:42:24,789 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:24,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:42:24,791 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-01-28 06:42:24,791 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 06:42:24,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:42:24,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1632927665, now seen corresponding path program 1 times [2023-01-28 06:42:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789395050] [2023-01-28 06:42:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:24,810 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:42:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:24,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:42:24,833 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:42:24,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:42:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:42:24,833 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:42:24,834 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:42:24,834 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:42:24,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 06:42:24,860 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:42:24,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:24,879 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-01-28 06:42:24,879 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:42:24,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 7/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-01-28 06:42:24,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:24,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:24,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:24,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:24,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:24,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:24,896 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-01-28 06:42:24,896 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:42:24,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 7/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-01-28 06:42:24,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 4536 [2023-01-28 06:42:26,468 INFO L134 LiptonReduction]: Checked pairs total: 5748 [2023-01-28 06:42:26,468 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-01-28 06:42:26,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:42:26,471 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:26,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:42:26,472 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:42:26,472 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:26,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:26,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:42:26,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:42:26,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 18687923, now seen corresponding path program 1 times [2023-01-28 06:42:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466501910] [2023-01-28 06:42:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:26,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:26,545 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 06:42:26,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466501910] [2023-01-28 06:42:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466501910] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:26,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:26,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:42:26,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420317134] [2023-01-28 06:42:26,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:26,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:26,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:26,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2023-01-28 06:42:26,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 06:42:26,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:26,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2023-01-28 06:42:26,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:26,596 INFO L130 PetriNetUnfolder]: 129/237 cut-off events. [2023-01-28 06:42:26,596 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 06:42:26,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 237 events. 129/237 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 936 event pairs, 47 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 198. Up to 125 conditions per place. [2023-01-28 06:42:26,598 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 17 selfloop transitions, 3 changer transitions 10/33 dead transitions. [2023-01-28 06:42:26,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 33 transitions, 143 flow [2023-01-28 06:42:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-01-28 06:42:26,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781849912739965 [2023-01-28 06:42:26,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-01-28 06:42:26,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-01-28 06:42:26,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:26,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-01-28 06:42:26,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 06:42:26,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 06:42:26,604 INFO L81 ComplementDD]: Finished complementDD. Result 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 06:42:26,604 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 56 flow. Second operand 3 states and 274 transitions. [2023-01-28 06:42:26,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 33 transitions, 143 flow [2023-01-28 06:42:26,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 141 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 06:42:26,606 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 65 flow [2023-01-28 06:42:26,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-01-28 06:42:26,607 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-01-28 06:42:26,607 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 65 flow [2023-01-28 06:42:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 06:42:26,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:26,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:42:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:42:26,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:42:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1992675438, now seen corresponding path program 1 times [2023-01-28 06:42:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237893536] [2023-01-28 06:42:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:26,680 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 06:42:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237893536] [2023-01-28 06:42:26,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237893536] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:26,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:26,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:42:26,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784070325] [2023-01-28 06:42:26,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:26,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:26,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:26,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2023-01-28 06:42:26,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 06:42:26,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:26,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2023-01-28 06:42:26,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:26,714 INFO L130 PetriNetUnfolder]: 109/201 cut-off events. [2023-01-28 06:42:26,714 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-01-28 06:42:26,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 201 events. 109/201 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 741 event pairs, 83 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 228. Up to 187 conditions per place. [2023-01-28 06:42:26,715 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-01-28 06:42:26,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 89 flow [2023-01-28 06:42:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-01-28 06:42:26,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450261780104712 [2023-01-28 06:42:26,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-01-28 06:42:26,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-01-28 06:42:26,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:26,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-01-28 06:42:26,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 06:42:26,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 06:42:26,720 INFO L81 ComplementDD]: Finished complementDD. Result 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 06:42:26,720 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 65 flow. Second operand 3 states and 258 transitions. [2023-01-28 06:42:26,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 89 flow [2023-01-28 06:42:26,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 83 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:42:26,721 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-01-28 06:42:26,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-01-28 06:42:26,722 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-01-28 06:42:26,722 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-01-28 06:42:26,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 06:42:26,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 06:42:26,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 06:42:26,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 06:42:26,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:42:26,723 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:42:26,723 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 06:42:26,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:26,744 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-01-28 06:42:26,745 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:42:26,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 7/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-01-28 06:42:26,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:26,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:26,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:26,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:26,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:26,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 210 flow [2023-01-28 06:42:26,756 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-01-28 06:42:26,756 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:42:26,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 7/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-01-28 06:42:26,759 INFO L119 LiptonReduction]: Number of co-enabled transitions 4536 [2023-01-28 06:42:28,273 INFO L134 LiptonReduction]: Checked pairs total: 5665 [2023-01-28 06:42:28,274 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-01-28 06:42:28,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:42:28,276 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:28,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:42:28,279 INFO L130 PetriNetUnfolder]: 2/26 cut-off events. [2023-01-28 06:42:28,279 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:42:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:28,279 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 06:42:28,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:42:28,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2147270299, now seen corresponding path program 1 times [2023-01-28 06:42:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:28,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446072751] [2023-01-28 06:42:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:28,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:42:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:28,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:42:28,323 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:42:28,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:42:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:42:28,323 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:42:28,326 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:42:28,326 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:42:28,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 06:42:28,358 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:42:28,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:28,388 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2023-01-28 06:42:28,388 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:42:28,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 170 events. 10/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-01-28 06:42:28,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:28,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:28,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:28,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:28,390 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:28,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:28,406 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2023-01-28 06:42:28,406 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:42:28,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 170 events. 10/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-01-28 06:42:28,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 10800 [2023-01-28 06:42:30,405 INFO L134 LiptonReduction]: Checked pairs total: 13802 [2023-01-28 06:42:30,405 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-01-28 06:42:30,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:42:30,407 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:30,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 06:42:30,408 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:42:30,408 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:30,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:30,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:42:30,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:42:30,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash 30581154, now seen corresponding path program 1 times [2023-01-28 06:42:30,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:30,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978843205] [2023-01-28 06:42:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:30,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:30,455 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 06:42:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978843205] [2023-01-28 06:42:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978843205] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:30,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:30,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:42:30,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330677654] [2023-01-28 06:42:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:30,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 263 [2023-01-28 06:42:30,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 06:42:30,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:30,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 263 [2023-01-28 06:42:30,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:30,702 INFO L130 PetriNetUnfolder]: 1525/2241 cut-off events. [2023-01-28 06:42:30,702 INFO L131 PetriNetUnfolder]: For 292/292 co-relation queries the response was YES. [2023-01-28 06:42:30,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 2241 events. 1525/2241 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10963 event pairs, 461 based on Foata normal form. 0/1800 useless extension candidates. Maximal degree in co-relation 862. Up to 1621 conditions per place. [2023-01-28 06:42:30,710 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-01-28 06:42:30,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 215 flow [2023-01-28 06:42:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-01-28 06:42:30,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47655259822560203 [2023-01-28 06:42:30,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-01-28 06:42:30,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-01-28 06:42:30,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:30,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-01-28 06:42:30,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 06:42:30,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 06:42:30,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 06:42:30,723 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 81 flow. Second operand 3 states and 376 transitions. [2023-01-28 06:42:30,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 215 flow [2023-01-28 06:42:30,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 207 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-28 06:42:30,726 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 103 flow [2023-01-28 06:42:30,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-01-28 06:42:30,728 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-01-28 06:42:30,728 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 103 flow [2023-01-28 06:42:30,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 06:42:30,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:30,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:42:30,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:42:30,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:42:30,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:30,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1866549389, now seen corresponding path program 1 times [2023-01-28 06:42:30,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969901232] [2023-01-28 06:42:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:30,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:30,771 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 06:42:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:30,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969901232] [2023-01-28 06:42:30,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969901232] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:30,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:30,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:42:30,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470671490] [2023-01-28 06:42:30,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:30,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:30,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 263 [2023-01-28 06:42:30,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 06:42:30,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:30,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 263 [2023-01-28 06:42:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:30,909 INFO L130 PetriNetUnfolder]: 1237/1837 cut-off events. [2023-01-28 06:42:30,909 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-01-28 06:42:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4108 conditions, 1837 events. 1237/1837 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8346 event pairs, 935 based on Foata normal form. 128/1928 useless extension candidates. Maximal degree in co-relation 2052. Up to 1755 conditions per place. [2023-01-28 06:42:30,913 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-01-28 06:42:30,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 143 flow [2023-01-28 06:42:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-01-28 06:42:30,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44740177439797213 [2023-01-28 06:42:30,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-01-28 06:42:30,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-01-28 06:42:30,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:30,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-01-28 06:42:30,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 06:42:30,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 06:42:30,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 06:42:30,918 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 103 flow. Second operand 3 states and 353 transitions. [2023-01-28 06:42:30,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 143 flow [2023-01-28 06:42:30,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:42:30,919 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-01-28 06:42:30,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-01-28 06:42:30,920 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-01-28 06:42:30,920 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-01-28 06:42:30,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 06:42:30,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 06:42:30,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 06:42:30,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 06:42:30,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 06:42:30,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:42:30,921 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:42:30,921 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:42:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:30,934 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2023-01-28 06:42:30,934 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:42:30,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 170 events. 10/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-01-28 06:42:30,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:30,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:30,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:30,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:30,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:30,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 293 flow [2023-01-28 06:42:30,948 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2023-01-28 06:42:30,948 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:42:30,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 170 events. 10/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-01-28 06:42:30,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 10800 [2023-01-28 06:42:32,948 INFO L134 LiptonReduction]: Checked pairs total: 13054 [2023-01-28 06:42:32,948 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-01-28 06:42:32,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:42:32,950 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:32,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:42:32,953 INFO L130 PetriNetUnfolder]: 3/37 cut-off events. [2023-01-28 06:42:32,953 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:42:32,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:32,953 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 06:42:32,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:42:32,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1396170759, now seen corresponding path program 1 times [2023-01-28 06:42:32,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:32,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419921738] [2023-01-28 06:42:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:32,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:32,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:42:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:32,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:42:32,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:42:32,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:42:32,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 06:42:32,985 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:42:32,988 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:42:32,988 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:42:32,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 06:42:33,015 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:42:33,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:33,038 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2023-01-28 06:42:33,038 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:42:33,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 219 events. 13/219 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2023-01-28 06:42:33,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:33,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:33,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:33,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:33,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:33,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:33,062 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2023-01-28 06:42:33,062 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:42:33,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 219 events. 13/219 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2023-01-28 06:42:33,072 INFO L119 LiptonReduction]: Number of co-enabled transitions 19728 [2023-01-28 06:42:35,399 INFO L134 LiptonReduction]: Checked pairs total: 23690 [2023-01-28 06:42:35,400 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-01-28 06:42:35,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:42:35,401 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:35,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 06:42:35,402 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-28 06:42:35,402 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:35,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:35,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:42:35,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 06:42:35,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 45902757, now seen corresponding path program 1 times [2023-01-28 06:42:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:35,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10785545] [2023-01-28 06:42:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:35,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:35,463 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 06:42:35,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:35,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10785545] [2023-01-28 06:42:35,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10785545] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:35,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:35,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:42:35,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905985270] [2023-01-28 06:42:35,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:35,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:35,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:35,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 339 [2023-01-28 06:42:35,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 06:42:35,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:35,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 339 [2023-01-28 06:42:35,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:37,141 INFO L130 PetriNetUnfolder]: 15543/20499 cut-off events. [2023-01-28 06:42:37,141 INFO L131 PetriNetUnfolder]: For 3384/3384 co-relation queries the response was YES. [2023-01-28 06:42:37,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42616 conditions, 20499 events. 15543/20499 cut-off events. For 3384/3384 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 110513 event pairs, 4221 based on Foata normal form. 0/15984 useless extension candidates. Maximal degree in co-relation 4715. Up to 17335 conditions per place. [2023-01-28 06:42:37,244 INFO L137 encePairwiseOnDemand]: 329/339 looper letters, 53 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-01-28 06:42:37,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 291 flow [2023-01-28 06:42:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-01-28 06:42:37,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47000983284169123 [2023-01-28 06:42:37,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-01-28 06:42:37,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-01-28 06:42:37,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:37,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-01-28 06:42:37,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states 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 06:42:37,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 06:42:37,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 06:42:37,250 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 108 flow. Second operand 3 states and 478 transitions. [2023-01-28 06:42:37,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 291 flow [2023-01-28 06:42:37,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 273 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-28 06:42:37,255 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 133 flow [2023-01-28 06:42:37,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-01-28 06:42:37,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-01-28 06:42:37,257 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 133 flow [2023-01-28 06:42:37,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 06:42:37,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:37,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:42:37,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 06:42:37,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 06:42:37,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1697605108, now seen corresponding path program 1 times [2023-01-28 06:42:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:37,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834387179] [2023-01-28 06:42:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:37,339 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 06:42:37,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834387179] [2023-01-28 06:42:37,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834387179] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:37,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:37,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:42:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890258452] [2023-01-28 06:42:37,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:37,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:37,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:37,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 339 [2023-01-28 06:42:37,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states 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 06:42:37,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:37,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 339 [2023-01-28 06:42:37,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:38,463 INFO L130 PetriNetUnfolder]: 10525/14077 cut-off events. [2023-01-28 06:42:38,464 INFO L131 PetriNetUnfolder]: For 2790/2790 co-relation queries the response was YES. [2023-01-28 06:42:38,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31221 conditions, 14077 events. 10525/14077 cut-off events. For 2790/2790 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 70158 event pairs, 7967 based on Foata normal form. 1344/15217 useless extension candidates. Maximal degree in co-relation 15760. Up to 13635 conditions per place. [2023-01-28 06:42:38,489 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-01-28 06:42:38,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 185 flow [2023-01-28 06:42:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-01-28 06:42:38,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44051130776794495 [2023-01-28 06:42:38,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-01-28 06:42:38,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-01-28 06:42:38,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:38,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-01-28 06:42:38,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 06:42:38,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 06:42:38,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 06:42:38,495 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 133 flow. Second operand 3 states and 448 transitions. [2023-01-28 06:42:38,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 185 flow [2023-01-28 06:42:38,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:42:38,498 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-01-28 06:42:38,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-01-28 06:42:38,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-01-28 06:42:38,499 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-01-28 06:42:38,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states 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 06:42:38,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-01-28 06:42:38,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-28 06:42:38,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-28 06:42:38,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-28 06:42:38,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-28 06:42:38,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:42:38,500 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:42:38,500 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:42:38,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:38,519 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2023-01-28 06:42:38,519 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:42:38,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 219 events. 13/219 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2023-01-28 06:42:38,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:38,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:38,525 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:38,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:38,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:38,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 378 flow [2023-01-28 06:42:38,545 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2023-01-28 06:42:38,545 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:42:38,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 219 events. 13/219 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2023-01-28 06:42:38,551 INFO L119 LiptonReduction]: Number of co-enabled transitions 19728 [2023-01-28 06:42:40,907 INFO L134 LiptonReduction]: Checked pairs total: 23682 [2023-01-28 06:42:40,907 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-01-28 06:42:40,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:42:40,908 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:40,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:42:40,911 INFO L130 PetriNetUnfolder]: 4/49 cut-off events. [2023-01-28 06:42:40,911 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:42:40,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:40,911 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 06:42:40,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:42:40,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1189340209, now seen corresponding path program 1 times [2023-01-28 06:42:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635491947] [2023-01-28 06:42:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:40,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:40,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:42:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:42:40,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:42:40,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:42:40,948 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:42:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 06:42:40,948 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:42:40,950 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:42:40,950 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:42:40,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 06:42:40,977 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:42:40,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 210 transitions, 465 flow [2023-01-28 06:42:41,001 INFO L130 PetriNetUnfolder]: 16/268 cut-off events. [2023-01-28 06:42:41,001 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:42:41,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 268 events. 16/268 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2023-01-28 06:42:41,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 210 transitions, 465 flow [2023-01-28 06:42:41,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 210 transitions, 465 flow [2023-01-28 06:42:41,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:42:41,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 210 transitions, 465 flow [2023-01-28 06:42:41,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 210 transitions, 465 flow [2023-01-28 06:42:41,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 210 transitions, 465 flow [2023-01-28 06:42:41,029 INFO L130 PetriNetUnfolder]: 16/268 cut-off events. [2023-01-28 06:42:41,030 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:42:41,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 268 events. 16/268 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2023-01-28 06:42:41,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 31320 [2023-01-28 06:42:43,914 INFO L134 LiptonReduction]: Checked pairs total: 37497 [2023-01-28 06:42:43,915 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-01-28 06:42:43,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:42:43,916 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:42:43,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-28 06:42:43,917 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:42:43,917 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:42:43,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:43,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:42:43,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 06:42:43,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash 65047036, now seen corresponding path program 1 times [2023-01-28 06:42:43,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:43,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160666598] [2023-01-28 06:42:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:43,944 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 06:42:43,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:43,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160666598] [2023-01-28 06:42:43,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160666598] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:43,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:43,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:42:43,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219471823] [2023-01-28 06:42:43,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:43,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:43,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:43,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2023-01-28 06:42:43,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 06:42:43,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:43,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2023-01-28 06:42:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:54,890 INFO L130 PetriNetUnfolder]: 146239/181311 cut-off events. [2023-01-28 06:42:54,890 INFO L131 PetriNetUnfolder]: For 35720/35720 co-relation queries the response was YES. [2023-01-28 06:42:55,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376753 conditions, 181311 events. 146239/181311 cut-off events. For 35720/35720 co-relation queries the response was YES. Maximal size of possible extension queue 6701. Compared 1020175 event pairs, 38427 based on Foata normal form. 0/138378 useless extension candidates. Maximal degree in co-relation 43003. Up to 165923 conditions per place. [2023-01-28 06:42:55,774 INFO L137 encePairwiseOnDemand]: 397/409 looper letters, 66 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-01-28 06:42:55,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 371 flow [2023-01-28 06:42:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:42:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:42:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2023-01-28 06:42:55,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47269763651181745 [2023-01-28 06:42:55,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2023-01-28 06:42:55,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2023-01-28 06:42:55,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:55,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2023-01-28 06:42:55,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 06:42:55,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states 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 06:42:55,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states 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 06:42:55,780 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 137 flow. Second operand 3 states and 580 transitions. [2023-01-28 06:42:55,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 371 flow [2023-01-28 06:42:55,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 339 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-01-28 06:42:55,812 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 163 flow [2023-01-28 06:42:55,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-01-28 06:42:55,813 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-01-28 06:42:55,813 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 163 flow [2023-01-28 06:42:55,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 06:42:55,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:55,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:42:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 06:42:55,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 06:42:55,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1436794962, now seen corresponding path program 1 times [2023-01-28 06:42:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:55,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765985308] [2023-01-28 06:42:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:55,868 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 06:42:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765985308] [2023-01-28 06:42:55,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765985308] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:55,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:55,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:42:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407628408] [2023-01-28 06:42:55,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:55,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:42:55,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:55,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:42:55,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:42:55,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2023-01-28 06:42:55,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 06:42:55,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:55,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2023-01-28 06:42:55,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:43:02,413 INFO L130 PetriNetUnfolder]: 81805/102893 cut-off events. [2023-01-28 06:43:02,414 INFO L131 PetriNetUnfolder]: For 21702/21702 co-relation queries the response was YES. [2023-01-28 06:43:02,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226854 conditions, 102893 events. 81805/102893 cut-off events. For 21702/21702 co-relation queries the response was YES. Maximal size of possible extension queue 3167. Compared 543477 event pairs, 62095 based on Foata normal form. 11744/113472 useless extension candidates. Maximal degree in co-relation 114504. Up to 100467 conditions per place. [2023-01-28 06:43:02,639 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-01-28 06:43:02,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 227 flow [2023-01-28 06:43:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:43:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:43:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-01-28 06:43:02,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44254278728606355 [2023-01-28 06:43:02,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-01-28 06:43:02,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-01-28 06:43:02,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:43:02,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-01-28 06:43:02,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 06:43:02,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states 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 06:43:02,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states 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 06:43:02,646 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 163 flow. Second operand 3 states and 543 transitions. [2023-01-28 06:43:02,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 227 flow [2023-01-28 06:43:02,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:43:02,667 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-01-28 06:43:02,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-01-28 06:43:02,667 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-01-28 06:43:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-01-28 06:43:02,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 06:43:02,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-28 06:43:02,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-28 06:43:02,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-28 06:43:02,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-28 06:43:02,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-28 06:43:02,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-28 06:43:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 06:43:02,668 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:43:02,669 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:43:02,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 210 transitions, 465 flow [2023-01-28 06:43:02,693 INFO L130 PetriNetUnfolder]: 16/268 cut-off events. [2023-01-28 06:43:02,694 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:43:02,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 268 events. 16/268 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2023-01-28 06:43:02,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 210 transitions, 465 flow [2023-01-28 06:43:02,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 210 transitions, 465 flow [2023-01-28 06:43:02,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:43:02,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 210 transitions, 465 flow [2023-01-28 06:43:02,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 210 transitions, 465 flow [2023-01-28 06:43:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 210 transitions, 465 flow [2023-01-28 06:43:02,720 INFO L130 PetriNetUnfolder]: 16/268 cut-off events. [2023-01-28 06:43:02,720 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:43:02,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 268 events. 16/268 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 232. Up to 12 conditions per place. [2023-01-28 06:43:02,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 31320 [2023-01-28 06:43:05,669 INFO L134 LiptonReduction]: Checked pairs total: 38964 [2023-01-28 06:43:05,669 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-01-28 06:43:05,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:43:05,670 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:43:05,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:43:05,675 INFO L130 PetriNetUnfolder]: 5/61 cut-off events. [2023-01-28 06:43:05,675 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:43:05,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:43:05,675 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:43:05,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:43:05,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:43:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -697707837, now seen corresponding path program 1 times [2023-01-28 06:43:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:43:05,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693563398] [2023-01-28 06:43:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:43:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:43:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:43:05,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:43:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:43:05,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:43:05,695 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:43:05,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:43:05,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 06:43:05,695 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:43:05,695 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:43:05,695 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:43:05,695 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-28 06:43:05,721 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:43:05,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 247 transitions, 554 flow [2023-01-28 06:43:05,754 INFO L130 PetriNetUnfolder]: 19/317 cut-off events. [2023-01-28 06:43:05,754 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:43:05,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 317 events. 19/317 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1026 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 289. Up to 14 conditions per place. [2023-01-28 06:43:05,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 247 transitions, 554 flow [2023-01-28 06:43:05,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 247 transitions, 554 flow [2023-01-28 06:43:05,757 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:43:05,757 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 247 transitions, 554 flow [2023-01-28 06:43:05,757 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 247 transitions, 554 flow [2023-01-28 06:43:05,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 247 transitions, 554 flow [2023-01-28 06:43:05,786 INFO L130 PetriNetUnfolder]: 19/317 cut-off events. [2023-01-28 06:43:05,786 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:43:05,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 317 events. 19/317 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1026 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 289. Up to 14 conditions per place. [2023-01-28 06:43:05,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 45576 [2023-01-28 06:43:09,046 INFO L134 LiptonReduction]: Checked pairs total: 57177 [2023-01-28 06:43:09,047 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-01-28 06:43:09,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:43:09,048 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;@3eb0dad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:43:09,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-28 06:43:09,049 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-28 06:43:09,049 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:43:09,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:43:09,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:43:09,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-28 06:43:09,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:43:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash 87043138, now seen corresponding path program 1 times [2023-01-28 06:43:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:43:09,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118931451] [2023-01-28 06:43:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:43:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:43:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:43:09,073 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 06:43:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:43:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118931451] [2023-01-28 06:43:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118931451] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:43:09,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:43:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:43:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860968085] [2023-01-28 06:43:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:43:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:43:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:43:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:43:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:43:09,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 486 [2023-01-28 06:43:09,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 06:43:09,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:43:09,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 486 [2023-01-28 06:43:09,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:45:05,885 INFO L130 PetriNetUnfolder]: 1303053/1553181 cut-off events. [2023-01-28 06:45:05,885 INFO L131 PetriNetUnfolder]: For 355810/355810 co-relation queries the response was YES. [2023-01-28 06:45:09,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225484 conditions, 1553181 events. 1303053/1553181 cut-off events. For 355810/355810 co-relation queries the response was YES. Maximal size of possible extension queue 44456. Compared 8948461 event pairs, 345987 based on Foata normal form. 0/1168070 useless extension candidates. Maximal degree in co-relation 379363. Up to 1480705 conditions per place.