/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-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-deagle/floating_read-25.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 09:35:23,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 09:35:23,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 09:35:24,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 09:35:24,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 09:35:24,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 09:35:24,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 09:35:24,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 09:35:24,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 09:35:24,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 09:35:24,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 09:35:24,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 09:35:24,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 09:35:24,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 09:35:24,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 09:35:24,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 09:35:24,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 09:35:24,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 09:35:24,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 09:35:24,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 09:35:24,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 09:35:24,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 09:35:24,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 09:35:24,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 09:35:24,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-19 09:35:24,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 09:35:24,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 09:35:24,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 09:35:24,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 09:35:24,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 09:35:24,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 09:35:24,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 09:35:24,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 09:35:24,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 09:35:24,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 09:35:24,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 09:35:24,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 09:35:24,130 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 09:35:24,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 09:35:24,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 09:35:24,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 09:35:24,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 09:35:24,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 09:35:24,132 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 09:35:24,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 09:35:24,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 09:35:24,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 09:35:24,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 09:35:24,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 09:35:24,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 09:35:24,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 09:35:24,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 09:35:24,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 09:35:24,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 09:35:24,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 09:35:24,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 09:35:24,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 09:35:24,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 09:35:24,136 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 09:35:24,136 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 09:35:24,136 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 09:35:24,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 09:35:24,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 09:35:24,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 09:35:24,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 09:35:24,350 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 09:35:24,352 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 09:35:24,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/floating_read-25.i [2022-01-19 09:35:24,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc06ced97/f23ca7d490c0494fbb7bd688b77215cd/FLAGd399a5a91 [2022-01-19 09:35:24,832 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 09:35:24,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/floating_read-25.i [2022-01-19 09:35:24,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc06ced97/f23ca7d490c0494fbb7bd688b77215cd/FLAGd399a5a91 [2022-01-19 09:35:24,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc06ced97/f23ca7d490c0494fbb7bd688b77215cd [2022-01-19 09:35:24,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 09:35:24,852 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 09:35:24,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 09:35:24,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 09:35:24,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 09:35:24,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 09:35:24" (1/1) ... [2022-01-19 09:35:24,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6730f107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:24, skipping insertion in model container [2022-01-19 09:35:24,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 09:35:24" (1/1) ... [2022-01-19 09:35:24,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 09:35:24,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 09:35:25,224 WARN L1533 CHandler]: Possible shadowing of function thread [2022-01-19 09:35:25,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/floating_read-25.i[31197,31210] [2022-01-19 09:35:25,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 09:35:25,236 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 09:35:25,253 WARN L1533 CHandler]: Possible shadowing of function thread [2022-01-19 09:35:25,255 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/floating_read-25.i[31197,31210] [2022-01-19 09:35:25,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 09:35:25,276 INFO L208 MainTranslator]: Completed translation [2022-01-19 09:35:25,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25 WrapperNode [2022-01-19 09:35:25,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 09:35:25,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 09:35:25,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 09:35:25,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 09:35:25,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,300 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-01-19 09:35:25,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 09:35:25,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 09:35:25,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 09:35:25,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 09:35:25,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 09:35:25,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 09:35:25,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 09:35:25,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 09:35:25,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (1/1) ... [2022-01-19 09:35:25,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 09:35:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:25,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 09:35:25,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 09:35:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 09:35:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 09:35:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 09:35:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 09:35:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 09:35:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 09:35:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 09:35:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-01-19 09:35:25,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-01-19 09:35:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 09:35:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 09:35:25,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 09:35:25,401 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 09:35:25,554 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 09:35:25,555 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 09:35:25,666 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 09:35:25,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 09:35:25,670 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 09:35:25,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 09:35:25 BoogieIcfgContainer [2022-01-19 09:35:25,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 09:35:25,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 09:35:25,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 09:35:25,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 09:35:25,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 09:35:24" (1/3) ... [2022-01-19 09:35:25,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4062b3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 09:35:25, skipping insertion in model container [2022-01-19 09:35:25,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:35:25" (2/3) ... [2022-01-19 09:35:25,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4062b3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 09:35:25, skipping insertion in model container [2022-01-19 09:35:25,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 09:35:25" (3/3) ... [2022-01-19 09:35:25,681 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-25.i [2022-01-19 09:35:25,686 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 09:35:25,686 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 09:35:25,687 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 09:35:25,709 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,709 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,709 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,709 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,709 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,710 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,710 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,710 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,710 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,710 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,710 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,711 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,712 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,712 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,714 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,714 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,715 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,715 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,715 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:25,718 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-01-19 09:35:25,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:25,756 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:25,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:25,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2022-01-19 09:35:25,790 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2022-01-19 09:35:25,791 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-01-19 09:35:25,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-01-19 09:35:25,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2022-01-19 09:35:25,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 39 transitions, 81 flow [2022-01-19 09:35:25,803 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-01-19 09:35:25,803 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:25,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:25,804 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:25,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2022-01-19 09:35:25,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:25,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781474844] [2022-01-19 09:35:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:25,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:25,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:25,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781474844] [2022-01-19 09:35:25,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781474844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:25,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:25,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 09:35:25,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448179754] [2022-01-19 09:35:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:25,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 09:35:25,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 09:35:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 09:35:25,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2022-01-19 09:35:25,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 81 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:25,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:25,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2022-01-19 09:35:25,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:25,986 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2022-01-19 09:35:25,986 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-01-19 09:35:25,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 45 events. 0/45 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 2/45 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-01-19 09:35:25,987 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2022-01-19 09:35:25,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 81 flow [2022-01-19 09:35:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 09:35:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 09:35:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2022-01-19 09:35:25,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2022-01-19 09:35:25,996 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2022-01-19 09:35:25,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2022-01-19 09:35:25,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:25,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2022-01-19 09:35:26,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,003 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,005 INFO L186 Difference]: Start difference. First operand has 41 places, 39 transitions, 81 flow. Second operand 2 states and 108 transitions. [2022-01-19 09:35:26,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 81 flow [2022-01-19 09:35:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 81 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:26,011 INFO L242 Difference]: Finished difference. Result has 42 places, 38 transitions, 79 flow [2022-01-19 09:35:26,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=79, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2022-01-19 09:35:26,015 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2022-01-19 09:35:26,016 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 79 flow [2022-01-19 09:35:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:26,017 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:26,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 09:35:26,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2022-01-19 09:35:26,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:26,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619045141] [2022-01-19 09:35:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:26,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619045141] [2022-01-19 09:35:26,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619045141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:26,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:26,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:26,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628960929] [2022-01-19 09:35:26,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:26,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:26,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:26,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2022-01-19 09:35:26,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:26,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2022-01-19 09:35:26,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:26,142 INFO L129 PetriNetUnfolder]: 0/42 cut-off events. [2022-01-19 09:35:26,142 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:26,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-01-19 09:35:26,143 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 6 selfloop transitions, 2 changer transitions 2/40 dead transitions. [2022-01-19 09:35:26,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 103 flow [2022-01-19 09:35:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-01-19 09:35:26,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2022-01-19 09:35:26,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-01-19 09:35:26,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-01-19 09:35:26,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:26,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-01-19 09:35:26,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,151 INFO L186 Difference]: Start difference. First operand has 42 places, 38 transitions, 79 flow. Second operand 3 states and 149 transitions. [2022-01-19 09:35:26,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 103 flow [2022-01-19 09:35:26,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 103 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:26,152 INFO L242 Difference]: Finished difference. Result has 45 places, 38 transitions, 87 flow [2022-01-19 09:35:26,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2022-01-19 09:35:26,153 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2022-01-19 09:35:26,153 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 87 flow [2022-01-19 09:35:26,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:26,153 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:26,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 09:35:26,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2022-01-19 09:35:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:26,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438900287] [2022-01-19 09:35:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:26,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438900287] [2022-01-19 09:35:26,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438900287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:26,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:26,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:26,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089776084] [2022-01-19 09:35:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:26,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:26,241 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2022-01-19 09:35:26,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:26,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2022-01-19 09:35:26,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:26,264 INFO L129 PetriNetUnfolder]: 0/42 cut-off events. [2022-01-19 09:35:26,264 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:35:26,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 42 events. 0/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-01-19 09:35:26,265 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-01-19 09:35:26,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 97 flow [2022-01-19 09:35:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2022-01-19 09:35:26,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2022-01-19 09:35:26,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2022-01-19 09:35:26,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2022-01-19 09:35:26,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:26,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2022-01-19 09:35:26,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,276 INFO L186 Difference]: Start difference. First operand has 45 places, 38 transitions, 87 flow. Second operand 3 states and 150 transitions. [2022-01-19 09:35:26,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 97 flow [2022-01-19 09:35:26,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 09:35:26,278 INFO L242 Difference]: Finished difference. Result has 46 places, 38 transitions, 91 flow [2022-01-19 09:35:26,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2022-01-19 09:35:26,279 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2022-01-19 09:35:26,279 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 91 flow [2022-01-19 09:35:26,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:26,280 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:26,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 09:35:26,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash 906942983, now seen corresponding path program 1 times [2022-01-19 09:35:26,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:26,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940202460] [2022-01-19 09:35:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:26,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:26,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940202460] [2022-01-19 09:35:26,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940202460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:26,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651413163] [2022-01-19 09:35:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:26,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:26,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:26,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 09:35:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:26,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:26,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651413163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:26,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:26,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:26,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129489988] [2022-01-19 09:35:26,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:26,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:26,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:26,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 59 [2022-01-19 09:35:26,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 47.3) internal successors, (473), 10 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:26,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 59 [2022-01-19 09:35:26,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:26,637 INFO L129 PetriNetUnfolder]: 0/39 cut-off events. [2022-01-19 09:35:26,637 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:35:26,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 39 events. 0/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-01-19 09:35:26,637 INFO L132 encePairwiseOnDemand]: 54/59 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2022-01-19 09:35:26,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 105 flow [2022-01-19 09:35:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 09:35:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 09:35:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2022-01-19 09:35:26,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7937853107344632 [2022-01-19 09:35:26,639 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 281 transitions. [2022-01-19 09:35:26,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 281 transitions. [2022-01-19 09:35:26,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:26,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 281 transitions. [2022-01-19 09:35:26,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 46.833333333333336) internal successors, (281), 6 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,642 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,642 INFO L186 Difference]: Start difference. First operand has 46 places, 38 transitions, 91 flow. Second operand 6 states and 281 transitions. [2022-01-19 09:35:26,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 105 flow [2022-01-19 09:35:26,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 09:35:26,643 INFO L242 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2022-01-19 09:35:26,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2022-01-19 09:35:26,645 INFO L334 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2022-01-19 09:35:26,645 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2022-01-19 09:35:26,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 47.3) internal successors, (473), 10 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,647 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-19 09:35:26,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 09:35:26,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:26,864 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-19 09:35:26,865 INFO L309 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2022-01-19 09:35:26,868 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2022-01-19 09:35:26,868 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:26,868 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:26,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2022-01-19 09:35:26,875 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2022-01-19 09:35:26,875 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-01-19 09:35:26,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-01-19 09:35:26,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2022-01-19 09:35:26,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 36 transitions, 77 flow [2022-01-19 09:35:26,879 INFO L129 PetriNetUnfolder]: 0/39 cut-off events. [2022-01-19 09:35:26,879 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:26,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:26,879 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:26,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-19 09:35:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2022-01-19 09:35:26,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243251405] [2022-01-19 09:35:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:26,890 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 09:35:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:26,907 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 09:35:26,907 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 09:35:26,907 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 1 remaining) [2022-01-19 09:35:26,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 09:35:26,908 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-19 09:35:26,908 INFO L309 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2022-01-19 09:35:26,908 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-19 09:35:26,908 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,914 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,915 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,916 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,917 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,918 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:26,919 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 09:35:26,920 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:26,921 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:26,921 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:26,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2022-01-19 09:35:26,931 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-01-19 09:35:26,931 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-01-19 09:35:26,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-01-19 09:35:26,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2022-01-19 09:35:26,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 98 flow [2022-01-19 09:35:26,933 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-01-19 09:35:26,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:26,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:26,934 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:26,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2022-01-19 09:35:26,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550151890] [2022-01-19 09:35:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:26,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550151890] [2022-01-19 09:35:26,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550151890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:26,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:26,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:26,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520079642] [2022-01-19 09:35:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:26,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:26,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:26,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2022-01-19 09:35:26,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:26,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2022-01-19 09:35:26,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:26,965 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2022-01-19 09:35:26,965 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-01-19 09:35:26,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 60 events. 0/60 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-01-19 09:35:26,966 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-01-19 09:35:26,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 130 flow [2022-01-19 09:35:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2022-01-19 09:35:26,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535353535353535 [2022-01-19 09:35:26,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2022-01-19 09:35:26,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2022-01-19 09:35:26,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:26,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2022-01-19 09:35:26,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,968 INFO L186 Difference]: Start difference. First operand has 49 places, 45 transitions, 98 flow. Second operand 3 states and 169 transitions. [2022-01-19 09:35:26,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 130 flow [2022-01-19 09:35:26,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:26,969 INFO L242 Difference]: Finished difference. Result has 52 places, 45 transitions, 108 flow [2022-01-19 09:35:26,969 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2022-01-19 09:35:26,970 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-01-19 09:35:26,970 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 108 flow [2022-01-19 09:35:26,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,970 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:26,970 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:26,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 09:35:26,970 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2022-01-19 09:35:26,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:26,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620997753] [2022-01-19 09:35:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:26,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:26,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:26,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620997753] [2022-01-19 09:35:26,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620997753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:26,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:26,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:26,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637412636] [2022-01-19 09:35:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:26,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:26,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:26,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2022-01-19 09:35:26,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:26,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:26,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2022-01-19 09:35:26,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:27,007 INFO L129 PetriNetUnfolder]: 4/85 cut-off events. [2022-01-19 09:35:27,007 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 09:35:27,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 85 events. 4/85 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 139 event pairs, 1 based on Foata normal form. 2/86 useless extension candidates. Maximal degree in co-relation 80. Up to 13 conditions per place. [2022-01-19 09:35:27,008 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2022-01-19 09:35:27,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 139 flow [2022-01-19 09:35:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-01-19 09:35:27,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-01-19 09:35:27,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-01-19 09:35:27,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-01-19 09:35:27,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:27,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-01-19 09:35:27,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,010 INFO L186 Difference]: Start difference. First operand has 52 places, 45 transitions, 108 flow. Second operand 3 states and 167 transitions. [2022-01-19 09:35:27,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 139 flow [2022-01-19 09:35:27,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:27,011 INFO L242 Difference]: Finished difference. Result has 54 places, 47 transitions, 125 flow [2022-01-19 09:35:27,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=106, 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=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2022-01-19 09:35:27,011 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2022-01-19 09:35:27,012 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 125 flow [2022-01-19 09:35:27,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,012 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 09:35:27,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2022-01-19 09:35:27,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:27,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039450684] [2022-01-19 09:35:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039450684] [2022-01-19 09:35:27,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039450684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310874731] [2022-01-19 09:35:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:27,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:27,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:27,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 09:35:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310874731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:27,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:27,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:27,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074153978] [2022-01-19 09:35:27,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:27,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:27,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:27,208 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2022-01-19 09:35:27,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 125 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:27,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2022-01-19 09:35:27,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:27,246 INFO L129 PetriNetUnfolder]: 1/58 cut-off events. [2022-01-19 09:35:27,246 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 09:35:27,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 58 events. 1/58 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 37. Up to 5 conditions per place. [2022-01-19 09:35:27,247 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 0 selfloop transitions, 0 changer transitions 50/50 dead transitions. [2022-01-19 09:35:27,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 159 flow [2022-01-19 09:35:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:35:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:35:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2022-01-19 09:35:27,248 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-01-19 09:35:27,248 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2022-01-19 09:35:27,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2022-01-19 09:35:27,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:27,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2022-01-19 09:35:27,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,250 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,250 INFO L186 Difference]: Start difference. First operand has 54 places, 47 transitions, 125 flow. Second operand 9 states and 468 transitions. [2022-01-19 09:35:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 159 flow [2022-01-19 09:35:27,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:27,251 INFO L242 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2022-01-19 09:35:27,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2022-01-19 09:35:27,252 INFO L334 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2022-01-19 09:35:27,252 INFO L470 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2022-01-19 09:35:27,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-19 09:35:27,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-19 09:35:27,468 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-19 09:35:27,468 INFO L309 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2022-01-19 09:35:27,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2022-01-19 09:35:27,473 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:27,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:27,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2022-01-19 09:35:27,480 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-01-19 09:35:27,480 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-01-19 09:35:27,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-01-19 09:35:27,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2022-01-19 09:35:27,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 42 transitions, 96 flow [2022-01-19 09:35:27,484 INFO L129 PetriNetUnfolder]: 0/54 cut-off events. [2022-01-19 09:35:27,484 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:35:27,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,484 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-19 09:35:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2022-01-19 09:35:27,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:27,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621333790] [2022-01-19 09:35:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:27,505 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 09:35:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:27,527 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 09:35:27,527 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 09:35:27,527 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 1 remaining) [2022-01-19 09:35:27,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 09:35:27,527 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-19 09:35:27,527 INFO L309 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2022-01-19 09:35:27,527 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-19 09:35:27,527 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,538 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,539 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,539 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,539 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,539 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,539 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,539 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,540 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,541 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,542 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,543 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,543 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,543 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,543 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,543 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,544 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,544 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,544 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,544 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,549 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,549 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,550 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,550 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,550 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,550 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,550 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:27,554 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 09:35:27,556 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:27,560 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:27,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:27,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2022-01-19 09:35:27,578 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2022-01-19 09:35:27,578 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-01-19 09:35:27,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 498 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2022-01-19 09:35:27,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2022-01-19 09:35:27,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 51 transitions, 117 flow [2022-01-19 09:35:27,581 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-01-19 09:35:27,581 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:27,581 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,581 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:27,582 INFO L85 PathProgramCache]: Analyzing trace with hash 898626907, now seen corresponding path program 1 times [2022-01-19 09:35:27,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:27,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642234473] [2022-01-19 09:35:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642234473] [2022-01-19 09:35:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642234473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:27,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:27,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 09:35:27,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369756210] [2022-01-19 09:35:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 09:35:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 09:35:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 09:35:27,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 73 [2022-01-19 09:35:27,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 117 flow. Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:27,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 73 [2022-01-19 09:35:27,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:27,628 INFO L129 PetriNetUnfolder]: 0/81 cut-off events. [2022-01-19 09:35:27,628 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-01-19 09:35:27,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 81 events. 0/81 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/81 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-01-19 09:35:27,628 INFO L132 encePairwiseOnDemand]: 72/73 looper letters, 3 selfloop transitions, 0 changer transitions 0/50 dead transitions. [2022-01-19 09:35:27,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 121 flow [2022-01-19 09:35:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 09:35:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 09:35:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 130 transitions. [2022-01-19 09:35:27,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8904109589041096 [2022-01-19 09:35:27,629 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 130 transitions. [2022-01-19 09:35:27,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 130 transitions. [2022-01-19 09:35:27,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:27,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 130 transitions. [2022-01-19 09:35:27,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,630 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,630 INFO L186 Difference]: Start difference. First operand has 57 places, 51 transitions, 117 flow. Second operand 2 states and 130 transitions. [2022-01-19 09:35:27,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 121 flow [2022-01-19 09:35:27,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 119 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:27,633 INFO L242 Difference]: Finished difference. Result has 58 places, 50 transitions, 113 flow [2022-01-19 09:35:27,633 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=113, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2022-01-19 09:35:27,635 INFO L334 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2022-01-19 09:35:27,635 INFO L470 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 113 flow [2022-01-19 09:35:27,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,635 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-19 09:35:27,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:27,635 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2022-01-19 09:35:27,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:27,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759253885] [2022-01-19 09:35:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759253885] [2022-01-19 09:35:27,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759253885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:27,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:27,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:27,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177250806] [2022-01-19 09:35:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:27,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:27,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:27,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:27,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:27,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-01-19 09:35:27,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:27,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-01-19 09:35:27,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:27,679 INFO L129 PetriNetUnfolder]: 0/78 cut-off events. [2022-01-19 09:35:27,680 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:35:27,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 78 events. 0/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-01-19 09:35:27,680 INFO L132 encePairwiseOnDemand]: 70/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2022-01-19 09:35:27,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 149 flow [2022-01-19 09:35:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-01-19 09:35:27,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2022-01-19 09:35:27,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-01-19 09:35:27,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-01-19 09:35:27,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:27,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-01-19 09:35:27,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,682 INFO L186 Difference]: Start difference. First operand has 58 places, 50 transitions, 113 flow. Second operand 3 states and 183 transitions. [2022-01-19 09:35:27,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 149 flow [2022-01-19 09:35:27,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 149 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:27,684 INFO L242 Difference]: Finished difference. Result has 61 places, 51 transitions, 125 flow [2022-01-19 09:35:27,684 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2022-01-19 09:35:27,684 INFO L334 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2022-01-19 09:35:27,684 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 125 flow [2022-01-19 09:35:27,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,684 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-19 09:35:27,684 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:27,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2022-01-19 09:35:27,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:27,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208547011] [2022-01-19 09:35:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:27,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208547011] [2022-01-19 09:35:27,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208547011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:27,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:27,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:27,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472346045] [2022-01-19 09:35:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:27,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:27,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:27,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-01-19 09:35:27,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:27,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-01-19 09:35:27,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:27,720 INFO L129 PetriNetUnfolder]: 21/174 cut-off events. [2022-01-19 09:35:27,720 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-01-19 09:35:27,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 174 events. 21/174 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 552 event pairs, 8 based on Foata normal form. 3/172 useless extension candidates. Maximal degree in co-relation 256. Up to 44 conditions per place. [2022-01-19 09:35:27,721 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2022-01-19 09:35:27,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 173 flow [2022-01-19 09:35:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-01-19 09:35:27,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2022-01-19 09:35:27,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-01-19 09:35:27,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-01-19 09:35:27,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:27,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-01-19 09:35:27,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,723 INFO L186 Difference]: Start difference. First operand has 61 places, 51 transitions, 125 flow. Second operand 3 states and 183 transitions. [2022-01-19 09:35:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 173 flow [2022-01-19 09:35:27,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:27,725 INFO L242 Difference]: Finished difference. Result has 63 places, 54 transitions, 149 flow [2022-01-19 09:35:27,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2022-01-19 09:35:27,725 INFO L334 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2022-01-19 09:35:27,725 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 149 flow [2022-01-19 09:35:27,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,725 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,725 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 09:35:27,726 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2022-01-19 09:35:27,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:27,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425819619] [2022-01-19 09:35:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425819619] [2022-01-19 09:35:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425819619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278212963] [2022-01-19 09:35:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:27,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:27,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:27,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 09:35:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:27,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278212963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:27,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:27,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:27,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577175533] [2022-01-19 09:35:27,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:27,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:27,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:27,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:27,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2022-01-19 09:35:27,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 149 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:27,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2022-01-19 09:35:27,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:27,960 INFO L129 PetriNetUnfolder]: 14/114 cut-off events. [2022-01-19 09:35:27,960 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 09:35:27,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 114 events. 14/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 224 event pairs, 6 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 182. Up to 29 conditions per place. [2022-01-19 09:35:27,961 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2022-01-19 09:35:27,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 215 flow [2022-01-19 09:35:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:35:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:35:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2022-01-19 09:35:27,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2022-01-19 09:35:27,962 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2022-01-19 09:35:27,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2022-01-19 09:35:27,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:27,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2022-01-19 09:35:27,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,964 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,964 INFO L186 Difference]: Start difference. First operand has 63 places, 54 transitions, 149 flow. Second operand 9 states and 519 transitions. [2022-01-19 09:35:27,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 215 flow [2022-01-19 09:35:27,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:27,966 INFO L242 Difference]: Finished difference. Result has 73 places, 60 transitions, 195 flow [2022-01-19 09:35:27,966 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=195, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2022-01-19 09:35:27,966 INFO L334 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-01-19 09:35:27,966 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 195 flow [2022-01-19 09:35:27,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:27,967 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:27,967 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:27,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:28,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:28,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1202178184, now seen corresponding path program 1 times [2022-01-19 09:35:28,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:28,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549386071] [2022-01-19 09:35:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:28,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:28,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549386071] [2022-01-19 09:35:28,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549386071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979670532] [2022-01-19 09:35:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:28,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:28,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:28,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 09:35:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 09:35:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:28,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:28,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979670532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:28,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:28,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-01-19 09:35:28,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453095862] [2022-01-19 09:35:28,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:28,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:35:28,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:35:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:35:28,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 73 [2022-01-19 09:35:28,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 195 flow. Second operand has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:28,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:28,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 73 [2022-01-19 09:35:28,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:29,321 INFO L129 PetriNetUnfolder]: 240/662 cut-off events. [2022-01-19 09:35:29,321 INFO L130 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2022-01-19 09:35:29,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 662 events. 240/662 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3422 event pairs, 0 based on Foata normal form. 19/681 useless extension candidates. Maximal degree in co-relation 1527. Up to 175 conditions per place. [2022-01-19 09:35:29,323 INFO L132 encePairwiseOnDemand]: 61/73 looper letters, 0 selfloop transitions, 0 changer transitions 240/240 dead transitions. [2022-01-19 09:35:29,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 240 transitions, 1316 flow [2022-01-19 09:35:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-19 09:35:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-01-19 09:35:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2735 transitions. [2022-01-19 09:35:29,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6811955168119551 [2022-01-19 09:35:29,328 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2735 transitions. [2022-01-19 09:35:29,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2735 transitions. [2022-01-19 09:35:29,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:29,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2735 transitions. [2022-01-19 09:35:29,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 49.72727272727273) internal successors, (2735), 55 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 73.0) internal successors, (4088), 56 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,338 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 73.0) internal successors, (4088), 56 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,338 INFO L186 Difference]: Start difference. First operand has 73 places, 60 transitions, 195 flow. Second operand 55 states and 2735 transitions. [2022-01-19 09:35:29,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 240 transitions, 1316 flow [2022-01-19 09:35:29,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 240 transitions, 1257 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-01-19 09:35:29,342 INFO L242 Difference]: Finished difference. Result has 120 places, 0 transitions, 0 flow [2022-01-19 09:35:29,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=0, PETRI_PLACES=120, PETRI_TRANSITIONS=0} [2022-01-19 09:35:29,343 INFO L334 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2022-01-19 09:35:29,343 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 0 transitions, 0 flow [2022-01-19 09:35:29,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,343 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-19 09:35:29,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:29,559 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-01-19 09:35:29,559 INFO L309 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2022-01-19 09:35:29,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2022-01-19 09:35:29,560 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:29,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:29,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2022-01-19 09:35:29,569 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2022-01-19 09:35:29,569 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-01-19 09:35:29,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 498 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2022-01-19 09:35:29,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2022-01-19 09:35:29,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 48 transitions, 117 flow [2022-01-19 09:35:29,572 INFO L129 PetriNetUnfolder]: 0/69 cut-off events. [2022-01-19 09:35:29,573 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-01-19 09:35:29,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:29,573 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:29,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-19 09:35:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2022-01-19 09:35:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:29,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047690945] [2022-01-19 09:35:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:29,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:29,582 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 09:35:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:29,603 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 09:35:29,603 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 09:35:29,603 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 1 remaining) [2022-01-19 09:35:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-19 09:35:29,603 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-19 09:35:29,603 INFO L309 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2022-01-19 09:35:29,603 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-19 09:35:29,603 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-01-19 09:35:29,608 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,608 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,608 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,608 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,609 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,610 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,611 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,612 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,613 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:29,615 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-19 09:35:29,615 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:29,616 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:29,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:29,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2022-01-19 09:35:29,645 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2022-01-19 09:35:29,645 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-01-19 09:35:29,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1165 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2022-01-19 09:35:29,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2022-01-19 09:35:29,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 57 transitions, 138 flow [2022-01-19 09:35:29,647 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-01-19 09:35:29,647 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:29,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:29,647 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:29,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2022-01-19 09:35:29,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791658490] [2022-01-19 09:35:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:29,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:29,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791658490] [2022-01-19 09:35:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791658490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:29,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:29,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:29,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241819460] [2022-01-19 09:35:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:29,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:29,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:29,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:29,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-01-19 09:35:29,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:29,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-01-19 09:35:29,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:29,671 INFO L129 PetriNetUnfolder]: 0/96 cut-off events. [2022-01-19 09:35:29,671 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-01-19 09:35:29,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 96 events. 0/96 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-01-19 09:35:29,672 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2022-01-19 09:35:29,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 174 flow [2022-01-19 09:35:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2022-01-19 09:35:29,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-01-19 09:35:29,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2022-01-19 09:35:29,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2022-01-19 09:35:29,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:29,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2022-01-19 09:35:29,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,673 INFO L186 Difference]: Start difference. First operand has 65 places, 57 transitions, 138 flow. Second operand 3 states and 201 transitions. [2022-01-19 09:35:29,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 174 flow [2022-01-19 09:35:29,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 168 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:29,674 INFO L242 Difference]: Finished difference. Result has 68 places, 57 transitions, 142 flow [2022-01-19 09:35:29,675 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2022-01-19 09:35:29,675 INFO L334 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-01-19 09:35:29,675 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 142 flow [2022-01-19 09:35:29,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,675 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:29,675 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:29,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 09:35:29,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:29,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:29,676 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2022-01-19 09:35:29,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:29,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855167033] [2022-01-19 09:35:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:29,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:29,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:29,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855167033] [2022-01-19 09:35:29,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855167033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:29,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:29,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:29,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647300011] [2022-01-19 09:35:29,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:29,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:29,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:29,688 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-01-19 09:35:29,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:29,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-01-19 09:35:29,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:29,713 INFO L129 PetriNetUnfolder]: 73/355 cut-off events. [2022-01-19 09:35:29,713 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-01-19 09:35:29,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 355 events. 73/355 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1590 event pairs, 35 based on Foata normal form. 4/344 useless extension candidates. Maximal degree in co-relation 515. Up to 126 conditions per place. [2022-01-19 09:35:29,715 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2022-01-19 09:35:29,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 207 flow [2022-01-19 09:35:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2022-01-19 09:35:29,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2022-01-19 09:35:29,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2022-01-19 09:35:29,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2022-01-19 09:35:29,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:29,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2022-01-19 09:35:29,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,716 INFO L186 Difference]: Start difference. First operand has 68 places, 57 transitions, 142 flow. Second operand 3 states and 199 transitions. [2022-01-19 09:35:29,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 207 flow [2022-01-19 09:35:29,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:29,718 INFO L242 Difference]: Finished difference. Result has 70 places, 61 transitions, 173 flow [2022-01-19 09:35:29,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2022-01-19 09:35:29,718 INFO L334 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2022-01-19 09:35:29,718 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 173 flow [2022-01-19 09:35:29,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:29,718 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:29,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-19 09:35:29,718 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2022-01-19 09:35:29,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:29,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185645831] [2022-01-19 09:35:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:29,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:29,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185645831] [2022-01-19 09:35:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185645831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947195088] [2022-01-19 09:35:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:29,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:29,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:29,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 09:35:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:29,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:29,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:29,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947195088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:29,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:29,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:29,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179080022] [2022-01-19 09:35:29,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:29,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:29,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:29,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-01-19 09:35:29,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 173 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:29,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-01-19 09:35:29,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:29,940 INFO L129 PetriNetUnfolder]: 54/232 cut-off events. [2022-01-19 09:35:29,940 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-01-19 09:35:29,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 232 events. 54/232 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 815 event pairs, 28 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 322. Up to 92 conditions per place. [2022-01-19 09:35:29,941 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2022-01-19 09:35:29,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 241 flow [2022-01-19 09:35:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:35:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:35:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2022-01-19 09:35:29,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2022-01-19 09:35:29,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2022-01-19 09:35:29,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2022-01-19 09:35:29,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:29,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2022-01-19 09:35:29,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,944 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,944 INFO L186 Difference]: Start difference. First operand has 70 places, 61 transitions, 173 flow. Second operand 9 states and 565 transitions. [2022-01-19 09:35:29,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 241 flow [2022-01-19 09:35:29,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:29,945 INFO L242 Difference]: Finished difference. Result has 80 places, 67 transitions, 218 flow [2022-01-19 09:35:29,945 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2022-01-19 09:35:29,946 INFO L334 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2022-01-19 09:35:29,946 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 218 flow [2022-01-19 09:35:29,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:29,946 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:29,946 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:29,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:30,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-19 09:35:30,162 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2022-01-19 09:35:30,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173996485] [2022-01-19 09:35:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:30,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:30,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173996485] [2022-01-19 09:35:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173996485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176261011] [2022-01-19 09:35:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:30,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:30,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:30,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 09:35:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 09:35:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:30,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176261011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:30,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:30,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-19 09:35:30,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485783985] [2022-01-19 09:35:30,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:30,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 09:35:30,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 09:35:30,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-19 09:35:30,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-01-19 09:35:30,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 218 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:30,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:30,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-01-19 09:35:30,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:30,779 INFO L129 PetriNetUnfolder]: 768/1915 cut-off events. [2022-01-19 09:35:30,779 INFO L130 PetriNetUnfolder]: For 1179/1187 co-relation queries the response was YES. [2022-01-19 09:35:30,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 1915 events. 768/1915 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12583 event pairs, 54 based on Foata normal form. 13/1928 useless extension candidates. Maximal degree in co-relation 1672. Up to 663 conditions per place. [2022-01-19 09:35:30,787 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/174 dead transitions. [2022-01-19 09:35:30,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 174 transitions, 995 flow [2022-01-19 09:35:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 09:35:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 09:35:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2022-01-19 09:35:30,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2022-01-19 09:35:30,789 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2022-01-19 09:35:30,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2022-01-19 09:35:30,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:30,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2022-01-19 09:35:30,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:30,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:30,792 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:30,793 INFO L186 Difference]: Start difference. First operand has 80 places, 67 transitions, 218 flow. Second operand 19 states and 1082 transitions. [2022-01-19 09:35:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 174 transitions, 995 flow [2022-01-19 09:35:30,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 174 transitions, 967 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:30,796 INFO L242 Difference]: Finished difference. Result has 99 places, 120 transitions, 603 flow [2022-01-19 09:35:30,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=603, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2022-01-19 09:35:30,796 INFO L334 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2022-01-19 09:35:30,796 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 603 flow [2022-01-19 09:35:30,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:30,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:30,797 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:30,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:31,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:31,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1362214409, now seen corresponding path program 1 times [2022-01-19 09:35:31,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127646457] [2022-01-19 09:35:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:31,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:35:31,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127646457] [2022-01-19 09:35:31,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127646457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33144909] [2022-01-19 09:35:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:31,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:31,063 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:31,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 09:35:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:31,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 09:35:31,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:35:31,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:35:31,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33144909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:31,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:31,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-19 09:35:31,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334179440] [2022-01-19 09:35:31,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:31,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 09:35:31,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 09:35:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-19 09:35:31,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-01-19 09:35:31,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 603 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:31,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:31,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-01-19 09:35:31,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:32,053 INFO L129 PetriNetUnfolder]: 1764/4279 cut-off events. [2022-01-19 09:35:32,053 INFO L130 PetriNetUnfolder]: For 4575/4585 co-relation queries the response was YES. [2022-01-19 09:35:32,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12371 conditions, 4279 events. 1764/4279 cut-off events. For 4575/4585 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 33976 event pairs, 65 based on Foata normal form. 28/4307 useless extension candidates. Maximal degree in co-relation 4810. Up to 1292 conditions per place. [2022-01-19 09:35:32,081 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/336 dead transitions. [2022-01-19 09:35:32,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 336 transitions, 2515 flow [2022-01-19 09:35:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 09:35:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 09:35:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2022-01-19 09:35:32,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2022-01-19 09:35:32,084 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2022-01-19 09:35:32,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2022-01-19 09:35:32,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:32,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2022-01-19 09:35:32,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:32,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:32,090 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:32,090 INFO L186 Difference]: Start difference. First operand has 99 places, 120 transitions, 603 flow. Second operand 41 states and 2224 transitions. [2022-01-19 09:35:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 336 transitions, 2515 flow [2022-01-19 09:35:32,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 336 transitions, 2493 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-01-19 09:35:32,108 INFO L242 Difference]: Finished difference. Result has 139 places, 254 transitions, 1859 flow [2022-01-19 09:35:32,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1859, PETRI_PLACES=139, PETRI_TRANSITIONS=254} [2022-01-19 09:35:32,108 INFO L334 CegarLoopForPetriNet]: 65 programPoint places, 74 predicate places. [2022-01-19 09:35:32,108 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 254 transitions, 1859 flow [2022-01-19 09:35:32,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:32,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:32,109 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:32,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:32,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:32,322 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2022-01-19 09:35:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:32,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631312609] [2022-01-19 09:35:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:32,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:32,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:32,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631312609] [2022-01-19 09:35:32,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631312609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:32,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224154682] [2022-01-19 09:35:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:32,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:32,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:32,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 09:35:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 09:35:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:32,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:32,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224154682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:32,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:32,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-19 09:35:32,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753458708] [2022-01-19 09:35:32,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:32,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 09:35:32,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 09:35:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-19 09:35:32,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-01-19 09:35:32,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 254 transitions, 1859 flow. Second operand has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:32,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:32,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-01-19 09:35:32,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:33,851 INFO L129 PetriNetUnfolder]: 2710/6004 cut-off events. [2022-01-19 09:35:33,851 INFO L130 PetriNetUnfolder]: For 14796/14898 co-relation queries the response was YES. [2022-01-19 09:35:33,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19740 conditions, 6004 events. 2710/6004 cut-off events. For 14796/14898 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 47265 event pairs, 0 based on Foata normal form. 295/6298 useless extension candidates. Maximal degree in co-relation 9283. Up to 1549 conditions per place. [2022-01-19 09:35:33,879 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 0 selfloop transitions, 0 changer transitions 1040/1040 dead transitions. [2022-01-19 09:35:33,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 1040 transitions, 10633 flow [2022-01-19 09:35:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 09:35:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 09:35:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2022-01-19 09:35:33,883 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2022-01-19 09:35:33,883 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2022-01-19 09:35:33,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2022-01-19 09:35:33,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:33,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2022-01-19 09:35:33,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:33,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:33,894 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:33,894 INFO L186 Difference]: Start difference. First operand has 139 places, 254 transitions, 1859 flow. Second operand 59 states and 3228 transitions. [2022-01-19 09:35:33,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 1040 transitions, 10633 flow [2022-01-19 09:35:33,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 1040 transitions, 10206 flow, removed 15 selfloop flow, removed 15 redundant places. [2022-01-19 09:35:33,950 INFO L242 Difference]: Finished difference. Result has 179 places, 0 transitions, 0 flow [2022-01-19 09:35:33,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=0, PETRI_PLACES=179, PETRI_TRANSITIONS=0} [2022-01-19 09:35:33,951 INFO L334 CegarLoopForPetriNet]: 65 programPoint places, 114 predicate places. [2022-01-19 09:35:33,951 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 0 transitions, 0 flow [2022-01-19 09:35:33,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:33,951 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-19 09:35:33,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 09:35:34,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-19 09:35:34,186 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,186 INFO L309 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2022-01-19 09:35:34,187 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2022-01-19 09:35:34,188 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:34,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:34,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2022-01-19 09:35:34,206 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2022-01-19 09:35:34,206 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-01-19 09:35:34,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1165 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2022-01-19 09:35:34,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2022-01-19 09:35:34,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 54 transitions, 140 flow [2022-01-19 09:35:34,211 INFO L129 PetriNetUnfolder]: 0/84 cut-off events. [2022-01-19 09:35:34,212 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-01-19 09:35:34,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:34,212 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-19 09:35:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2022-01-19 09:35:34,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:34,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036767172] [2022-01-19 09:35:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:34,221 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 09:35:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:34,246 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 09:35:34,246 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 09:35:34,247 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 1 remaining) [2022-01-19 09:35:34,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-19 09:35:34,247 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-19 09:35:34,247 INFO L309 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2022-01-19 09:35:34,247 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-19 09:35:34,247 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-01-19 09:35:34,253 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,253 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,253 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,253 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,254 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,255 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,256 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,257 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,258 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,259 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,260 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,261 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:34,262 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-01-19 09:35:34,263 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:34,263 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:34,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:34,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2022-01-19 09:35:34,307 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2022-01-19 09:35:34,307 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-01-19 09:35:34,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2833 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2022-01-19 09:35:34,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2022-01-19 09:35:34,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 63 transitions, 161 flow [2022-01-19 09:35:34,315 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-01-19 09:35:34,315 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:34,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:34,315 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:34,315 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2022-01-19 09:35:34,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:34,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223793475] [2022-01-19 09:35:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:34,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223793475] [2022-01-19 09:35:34,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223793475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:34,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:34,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 09:35:34,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153904891] [2022-01-19 09:35:34,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:34,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 09:35:34,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 09:35:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 09:35:34,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2022-01-19 09:35:34,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 161 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:34,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2022-01-19 09:35:34,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:34,340 INFO L129 PetriNetUnfolder]: 0/117 cut-off events. [2022-01-19 09:35:34,340 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-01-19 09:35:34,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 117 events. 0/117 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-01-19 09:35:34,341 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/62 dead transitions. [2022-01-19 09:35:34,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 62 transitions, 169 flow [2022-01-19 09:35:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 09:35:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 09:35:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-01-19 09:35:34,342 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2022-01-19 09:35:34,342 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-01-19 09:35:34,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-01-19 09:35:34,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:34,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-01-19 09:35:34,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,343 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,343 INFO L186 Difference]: Start difference. First operand has 73 places, 63 transitions, 161 flow. Second operand 2 states and 152 transitions. [2022-01-19 09:35:34,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 62 transitions, 169 flow [2022-01-19 09:35:34,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 157 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:34,345 INFO L242 Difference]: Finished difference. Result has 74 places, 62 transitions, 147 flow [2022-01-19 09:35:34,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=147, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2022-01-19 09:35:34,345 INFO L334 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2022-01-19 09:35:34,345 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 147 flow [2022-01-19 09:35:34,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:34,345 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-19 09:35:34,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2022-01-19 09:35:34,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:34,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243232166] [2022-01-19 09:35:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:34,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:34,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243232166] [2022-01-19 09:35:34,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243232166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:34,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:34,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:34,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048939440] [2022-01-19 09:35:34,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:34,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:34,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:34,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2022-01-19 09:35:34,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:34,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2022-01-19 09:35:34,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:34,376 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2022-01-19 09:35:34,376 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 09:35:34,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 114 events. 0/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-01-19 09:35:34,377 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-01-19 09:35:34,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 66 transitions, 187 flow [2022-01-19 09:35:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-01-19 09:35:34,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-01-19 09:35:34,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-01-19 09:35:34,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-01-19 09:35:34,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:34,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-01-19 09:35:34,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,378 INFO L186 Difference]: Start difference. First operand has 74 places, 62 transitions, 147 flow. Second operand 3 states and 215 transitions. [2022-01-19 09:35:34,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 66 transitions, 187 flow [2022-01-19 09:35:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 187 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:34,379 INFO L242 Difference]: Finished difference. Result has 77 places, 63 transitions, 159 flow [2022-01-19 09:35:34,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2022-01-19 09:35:34,380 INFO L334 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2022-01-19 09:35:34,380 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 159 flow [2022-01-19 09:35:34,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:34,380 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-19 09:35:34,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2022-01-19 09:35:34,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:34,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557522685] [2022-01-19 09:35:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:34,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:34,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557522685] [2022-01-19 09:35:34,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557522685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:34,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:34,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:34,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434677338] [2022-01-19 09:35:34,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:34,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:34,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:34,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2022-01-19 09:35:34,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:34,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2022-01-19 09:35:34,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:34,455 INFO L129 PetriNetUnfolder]: 212/728 cut-off events. [2022-01-19 09:35:34,456 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-01-19 09:35:34,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 728 events. 212/728 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4000 event pairs, 118 based on Foata normal form. 5/698 useless extension candidates. Maximal degree in co-relation 1185. Up to 327 conditions per place. [2022-01-19 09:35:34,459 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2022-01-19 09:35:34,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 241 flow [2022-01-19 09:35:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-01-19 09:35:34,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-01-19 09:35:34,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-01-19 09:35:34,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-01-19 09:35:34,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:34,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-01-19 09:35:34,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,461 INFO L186 Difference]: Start difference. First operand has 77 places, 63 transitions, 159 flow. Second operand 3 states and 215 transitions. [2022-01-19 09:35:34,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 241 flow [2022-01-19 09:35:34,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:34,463 INFO L242 Difference]: Finished difference. Result has 79 places, 68 transitions, 197 flow [2022-01-19 09:35:34,463 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2022-01-19 09:35:34,463 INFO L334 CegarLoopForPetriNet]: 73 programPoint places, 6 predicate places. [2022-01-19 09:35:34,463 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 197 flow [2022-01-19 09:35:34,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:34,463 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-19 09:35:34,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2022-01-19 09:35:34,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399154588] [2022-01-19 09:35:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:34,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:34,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399154588] [2022-01-19 09:35:34,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399154588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:34,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024734845] [2022-01-19 09:35:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:34,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:34,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:34,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 09:35:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:34,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:34,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024734845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:34,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:34,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:34,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119414171] [2022-01-19 09:35:34,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:34,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:34,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:34,635 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-01-19 09:35:34,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:34,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-01-19 09:35:34,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:34,701 INFO L129 PetriNetUnfolder]: 161/488 cut-off events. [2022-01-19 09:35:34,701 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-01-19 09:35:34,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 488 events. 161/488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2424 event pairs, 94 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 799. Up to 246 conditions per place. [2022-01-19 09:35:34,703 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2022-01-19 09:35:34,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 267 flow [2022-01-19 09:35:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:35:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:35:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2022-01-19 09:35:34,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2022-01-19 09:35:34,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2022-01-19 09:35:34,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2022-01-19 09:35:34,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:34,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2022-01-19 09:35:34,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,705 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,705 INFO L186 Difference]: Start difference. First operand has 79 places, 68 transitions, 197 flow. Second operand 9 states and 611 transitions. [2022-01-19 09:35:34,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 267 flow [2022-01-19 09:35:34,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:34,707 INFO L242 Difference]: Finished difference. Result has 89 places, 74 transitions, 241 flow [2022-01-19 09:35:34,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=241, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2022-01-19 09:35:34,707 INFO L334 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2022-01-19 09:35:34,707 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 241 flow [2022-01-19 09:35:34,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:34,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:34,708 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:34,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:34,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 09:35:34,921 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2022-01-19 09:35:34,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:34,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803168191] [2022-01-19 09:35:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:34,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803168191] [2022-01-19 09:35:34,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803168191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070131895] [2022-01-19 09:35:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:34,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:34,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:35,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 09:35:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 09:35:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:35,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070131895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:35,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:35,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-01-19 09:35:35,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699122019] [2022-01-19 09:35:35,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:35,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:35:35,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:35:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:35:35,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-01-19 09:35:35,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 241 flow. Second operand has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:35,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:35,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-01-19 09:35:35,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:36,858 INFO L129 PetriNetUnfolder]: 1890/3638 cut-off events. [2022-01-19 09:35:36,858 INFO L130 PetriNetUnfolder]: For 2302/2302 co-relation queries the response was YES. [2022-01-19 09:35:36,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9296 conditions, 3638 events. 1890/3638 cut-off events. For 2302/2302 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22878 event pairs, 0 based on Foata normal form. 137/3775 useless extension candidates. Maximal degree in co-relation 9283. Up to 1597 conditions per place. [2022-01-19 09:35:36,871 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 0 selfloop transitions, 0 changer transitions 517/517 dead transitions. [2022-01-19 09:35:36,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 517 transitions, 2982 flow [2022-01-19 09:35:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-19 09:35:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-01-19 09:35:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5377 transitions. [2022-01-19 09:35:36,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6791714033093343 [2022-01-19 09:35:36,880 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5377 transitions. [2022-01-19 09:35:36,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5377 transitions. [2022-01-19 09:35:36,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:36,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5377 transitions. [2022-01-19 09:35:36,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 59.08791208791209) internal successors, (5377), 91 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:36,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:36,903 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:36,903 INFO L186 Difference]: Start difference. First operand has 89 places, 74 transitions, 241 flow. Second operand 91 states and 5377 transitions. [2022-01-19 09:35:36,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 517 transitions, 2982 flow [2022-01-19 09:35:36,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 517 transitions, 2875 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-01-19 09:35:36,912 INFO L242 Difference]: Finished difference. Result has 172 places, 0 transitions, 0 flow [2022-01-19 09:35:36,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=0, PETRI_PLACES=172, PETRI_TRANSITIONS=0} [2022-01-19 09:35:36,912 INFO L334 CegarLoopForPetriNet]: 73 programPoint places, 99 predicate places. [2022-01-19 09:35:36,912 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 0 transitions, 0 flow [2022-01-19 09:35:36,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:36,917 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-19 09:35:36,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:37,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 09:35:37,132 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-01-19 09:35:37,133 INFO L309 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2022-01-19 09:35:37,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2022-01-19 09:35:37,137 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:37,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:37,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2022-01-19 09:35:37,168 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2022-01-19 09:35:37,168 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-01-19 09:35:37,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2833 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2022-01-19 09:35:37,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2022-01-19 09:35:37,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 60 transitions, 165 flow [2022-01-19 09:35:37,176 INFO L129 PetriNetUnfolder]: 0/99 cut-off events. [2022-01-19 09:35:37,176 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-01-19 09:35:37,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:37,176 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:37,176 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-19 09:35:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2022-01-19 09:35:37,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:37,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126393616] [2022-01-19 09:35:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:37,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:37,197 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 09:35:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:37,207 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 09:35:37,207 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 09:35:37,207 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 1 remaining) [2022-01-19 09:35:37,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-19 09:35:37,207 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-19 09:35:37,207 INFO L309 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2022-01-19 09:35:37,207 WARN L235 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-19 09:35:37,207 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,224 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,225 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,226 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,228 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,229 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,230 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,231 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,232 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,233 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,234 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,235 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,235 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,235 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,235 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,235 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:37,236 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-01-19 09:35:37,237 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:37,237 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:37,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:37,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 94 transitions, 266 flow [2022-01-19 09:35:37,301 INFO L129 PetriNetUnfolder]: 213/1255 cut-off events. [2022-01-19 09:35:37,301 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-01-19 09:35:37,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1255 events. 213/1255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6828 event pairs, 72 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 771. Up to 192 conditions per place. [2022-01-19 09:35:37,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 94 transitions, 266 flow [2022-01-19 09:35:37,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 69 transitions, 186 flow [2022-01-19 09:35:37,307 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-01-19 09:35:37,307 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:37,307 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:37,307 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:37,307 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash -543324351, now seen corresponding path program 1 times [2022-01-19 09:35:37,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:37,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647953866] [2022-01-19 09:35:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:37,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:37,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647953866] [2022-01-19 09:35:37,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647953866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:37,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:37,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:37,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139346646] [2022-01-19 09:35:37,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:37,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:37,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:37,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 94 [2022-01-19 09:35:37,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:37,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 94 [2022-01-19 09:35:37,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:37,340 INFO L129 PetriNetUnfolder]: 0/132 cut-off events. [2022-01-19 09:35:37,340 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-01-19 09:35:37,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 132 events. 0/132 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-01-19 09:35:37,340 INFO L132 encePairwiseOnDemand]: 90/94 looper letters, 15 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2022-01-19 09:35:37,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 72 transitions, 226 flow [2022-01-19 09:35:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-01-19 09:35:37,341 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8262411347517731 [2022-01-19 09:35:37,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-01-19 09:35:37,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-01-19 09:35:37,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:37,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-01-19 09:35:37,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 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) [2022-01-19 09:35:37,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 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) [2022-01-19 09:35:37,342 INFO L186 Difference]: Start difference. First operand has 81 places, 69 transitions, 186 flow. Second operand 3 states and 233 transitions. [2022-01-19 09:35:37,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 72 transitions, 226 flow [2022-01-19 09:35:37,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 72 transitions, 206 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:37,343 INFO L242 Difference]: Finished difference. Result has 84 places, 69 transitions, 176 flow [2022-01-19 09:35:37,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2022-01-19 09:35:37,343 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2022-01-19 09:35:37,343 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 176 flow [2022-01-19 09:35:37,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:37,344 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:37,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-19 09:35:37,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1763634818, now seen corresponding path program 1 times [2022-01-19 09:35:37,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:37,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389154475] [2022-01-19 09:35:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:37,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:37,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389154475] [2022-01-19 09:35:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389154475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:37,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:37,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:37,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922282051] [2022-01-19 09:35:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:37,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:37,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:37,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-01-19 09:35:37,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:37,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-01-19 09:35:37,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:37,467 INFO L129 PetriNetUnfolder]: 558/1509 cut-off events. [2022-01-19 09:35:37,468 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-01-19 09:35:37,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2557 conditions, 1509 events. 558/1509 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9680 event pairs, 345 based on Foata normal form. 6/1445 useless extension candidates. Maximal degree in co-relation 2510. Up to 799 conditions per place. [2022-01-19 09:35:37,477 INFO L132 encePairwiseOnDemand]: 86/94 looper letters, 19 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2022-01-19 09:35:37,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 275 flow [2022-01-19 09:35:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-01-19 09:35:37,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8191489361702128 [2022-01-19 09:35:37,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-01-19 09:35:37,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-01-19 09:35:37,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:37,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-01-19 09:35:37,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 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) [2022-01-19 09:35:37,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 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) [2022-01-19 09:35:37,479 INFO L186 Difference]: Start difference. First operand has 84 places, 69 transitions, 176 flow. Second operand 3 states and 231 transitions. [2022-01-19 09:35:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 275 flow [2022-01-19 09:35:37,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:37,480 INFO L242 Difference]: Finished difference. Result has 86 places, 75 transitions, 221 flow [2022-01-19 09:35:37,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2022-01-19 09:35:37,480 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2022-01-19 09:35:37,480 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 221 flow [2022-01-19 09:35:37,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:37,481 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:37,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-19 09:35:37,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -35190009, now seen corresponding path program 1 times [2022-01-19 09:35:37,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:37,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907772878] [2022-01-19 09:35:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:37,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:37,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907772878] [2022-01-19 09:35:37,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907772878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651943864] [2022-01-19 09:35:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:37,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:37,520 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:37,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 09:35:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:37,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:37,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651943864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:37,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:37,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:37,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389009477] [2022-01-19 09:35:37,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:37,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:37,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:37,691 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 94 [2022-01-19 09:35:37,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 221 flow. Second operand has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:37,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 94 [2022-01-19 09:35:37,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:37,805 INFO L129 PetriNetUnfolder]: 427/1046 cut-off events. [2022-01-19 09:35:37,805 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-01-19 09:35:37,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1046 events. 427/1046 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6061 event pairs, 272 based on Foata normal form. 2/946 useless extension candidates. Maximal degree in co-relation 1677. Up to 607 conditions per place. [2022-01-19 09:35:37,812 INFO L132 encePairwiseOnDemand]: 88/94 looper letters, 16 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2022-01-19 09:35:37,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 293 flow [2022-01-19 09:35:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:35:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:35:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 657 transitions. [2022-01-19 09:35:37,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.776595744680851 [2022-01-19 09:35:37,818 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 657 transitions. [2022-01-19 09:35:37,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 657 transitions. [2022-01-19 09:35:37,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:37,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 657 transitions. [2022-01-19 09:35:37,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,820 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,820 INFO L186 Difference]: Start difference. First operand has 86 places, 75 transitions, 221 flow. Second operand 9 states and 657 transitions. [2022-01-19 09:35:37,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 293 flow [2022-01-19 09:35:37,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 85 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:37,821 INFO L242 Difference]: Finished difference. Result has 96 places, 81 transitions, 264 flow [2022-01-19 09:35:37,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2022-01-19 09:35:37,821 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2022-01-19 09:35:37,822 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 264 flow [2022-01-19 09:35:37,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:37,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:37,822 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:37,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-19 09:35:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-19 09:35:38,035 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 313922154, now seen corresponding path program 1 times [2022-01-19 09:35:38,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917775361] [2022-01-19 09:35:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:38,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:38,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:38,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917775361] [2022-01-19 09:35:38,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917775361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:38,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523712631] [2022-01-19 09:35:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:38,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:38,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:38,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 09:35:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 09:35:38,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:38,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:38,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523712631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:38,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:38,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-01-19 09:35:38,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068985875] [2022-01-19 09:35:38,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:38,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 09:35:38,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 09:35:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-19 09:35:38,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 94 [2022-01-19 09:35:38,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 264 flow. Second operand has 21 states, 21 states have (on average 61.0) internal successors, (1281), 21 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:38,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:38,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 94 [2022-01-19 09:35:38,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:40,630 INFO L129 PetriNetUnfolder]: 4756/8264 cut-off events. [2022-01-19 09:35:40,630 INFO L130 PetriNetUnfolder]: For 5551/5551 co-relation queries the response was YES. [2022-01-19 09:35:40,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21654 conditions, 8264 events. 4756/8264 cut-off events. For 5551/5551 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 54242 event pairs, 0 based on Foata normal form. 296/8560 useless extension candidates. Maximal degree in co-relation 9277. Up to 4159 conditions per place. [2022-01-19 09:35:40,666 INFO L132 encePairwiseOnDemand]: 79/94 looper letters, 0 selfloop transitions, 0 changer transitions 687/687 dead transitions. [2022-01-19 09:35:40,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 687 transitions, 4004 flow [2022-01-19 09:35:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-19 09:35:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-01-19 09:35:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 6941 transitions. [2022-01-19 09:35:40,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6774350966230724 [2022-01-19 09:35:40,672 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 6941 transitions. [2022-01-19 09:35:40,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 6941 transitions. [2022-01-19 09:35:40,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:40,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 6941 transitions. [2022-01-19 09:35:40,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 63.678899082568805) internal successors, (6941), 109 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:40,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 94.0) internal successors, (10340), 110 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:40,695 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 94.0) internal successors, (10340), 110 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:40,695 INFO L186 Difference]: Start difference. First operand has 96 places, 81 transitions, 264 flow. Second operand 109 states and 6941 transitions. [2022-01-19 09:35:40,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 687 transitions, 4004 flow [2022-01-19 09:35:40,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 687 transitions, 3873 flow, removed 30 selfloop flow, removed 4 redundant places. [2022-01-19 09:35:40,706 INFO L242 Difference]: Finished difference. Result has 197 places, 0 transitions, 0 flow [2022-01-19 09:35:40,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=0, PETRI_PLACES=197, PETRI_TRANSITIONS=0} [2022-01-19 09:35:40,706 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 116 predicate places. [2022-01-19 09:35:40,706 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 0 transitions, 0 flow [2022-01-19 09:35:40,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.0) internal successors, (1281), 21 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:40,707 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-19 09:35:40,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:40,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 09:35:40,920 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-19 09:35:40,920 INFO L309 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2022-01-19 09:35:40,920 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2022-01-19 09:35:40,921 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:40,921 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:40,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 94 transitions, 266 flow [2022-01-19 09:35:40,982 INFO L129 PetriNetUnfolder]: 213/1255 cut-off events. [2022-01-19 09:35:40,983 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-01-19 09:35:40,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1255 events. 213/1255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6828 event pairs, 72 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 771. Up to 192 conditions per place. [2022-01-19 09:35:40,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 94 transitions, 266 flow [2022-01-19 09:35:40,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 66 transitions, 192 flow [2022-01-19 09:35:40,992 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2022-01-19 09:35:40,992 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-01-19 09:35:40,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:40,992 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:40,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-19 09:35:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2072494017, now seen corresponding path program 1 times [2022-01-19 09:35:40,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:40,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685499598] [2022-01-19 09:35:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:40,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:41,004 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-19 09:35:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-19 09:35:41,015 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-19 09:35:41,016 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-19 09:35:41,016 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 1 remaining) [2022-01-19 09:35:41,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-19 09:35:41,016 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-19 09:35:41,016 INFO L309 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2022-01-19 09:35:41,016 WARN L235 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-19 09:35:41,016 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,022 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,023 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,024 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,025 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,026 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,043 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,044 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,045 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,046 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,047 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,048 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:35:41,050 INFO L148 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-01-19 09:35:41,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:35:41,050 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 09:35:41,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-19 09:35:41,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 101 transitions, 300 flow [2022-01-19 09:35:41,191 INFO L129 PetriNetUnfolder]: 472/2430 cut-off events. [2022-01-19 09:35:41,191 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-01-19 09:35:41,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 2430 events. 472/2430 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16323 event pairs, 201 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 1473. Up to 448 conditions per place. [2022-01-19 09:35:41,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 101 transitions, 300 flow [2022-01-19 09:35:41,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 75 transitions, 213 flow [2022-01-19 09:35:41,202 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-01-19 09:35:41,202 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-19 09:35:41,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:41,202 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:41,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash -196252411, now seen corresponding path program 1 times [2022-01-19 09:35:41,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:41,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911009715] [2022-01-19 09:35:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:41,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:41,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:41,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911009715] [2022-01-19 09:35:41,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911009715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:41,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:41,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 09:35:41,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687623928] [2022-01-19 09:35:41,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:41,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 09:35:41,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 09:35:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 09:35:41,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 101 [2022-01-19 09:35:41,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 213 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:41,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 101 [2022-01-19 09:35:41,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:41,220 INFO L129 PetriNetUnfolder]: 0/153 cut-off events. [2022-01-19 09:35:41,220 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-01-19 09:35:41,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 153 events. 0/153 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 8/153 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-01-19 09:35:41,220 INFO L132 encePairwiseOnDemand]: 100/101 looper letters, 7 selfloop transitions, 0 changer transitions 0/74 dead transitions. [2022-01-19 09:35:41,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 225 flow [2022-01-19 09:35:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 09:35:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 09:35:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2022-01-19 09:35:41,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8613861386138614 [2022-01-19 09:35:41,221 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2022-01-19 09:35:41,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2022-01-19 09:35:41,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:41,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2022-01-19 09:35:41,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,222 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,222 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 213 flow. Second operand 2 states and 174 transitions. [2022-01-19 09:35:41,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 225 flow [2022-01-19 09:35:41,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 74 transitions, 195 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:41,223 INFO L242 Difference]: Finished difference. Result has 90 places, 74 transitions, 181 flow [2022-01-19 09:35:41,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=181, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2022-01-19 09:35:41,223 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 1 predicate places. [2022-01-19 09:35:41,223 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 181 flow [2022-01-19 09:35:41,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:41,223 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:41,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-19 09:35:41,224 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash -196251450, now seen corresponding path program 1 times [2022-01-19 09:35:41,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660493379] [2022-01-19 09:35:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:41,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:41,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:41,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660493379] [2022-01-19 09:35:41,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660493379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:41,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:41,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:41,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303141799] [2022-01-19 09:35:41,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:41,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:41,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:41,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:41,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 101 [2022-01-19 09:35:41,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:41,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 101 [2022-01-19 09:35:41,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:41,251 INFO L129 PetriNetUnfolder]: 0/150 cut-off events. [2022-01-19 09:35:41,251 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-01-19 09:35:41,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 150 events. 0/150 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-01-19 09:35:41,251 INFO L132 encePairwiseOnDemand]: 98/101 looper letters, 16 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-01-19 09:35:41,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 225 flow [2022-01-19 09:35:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-01-19 09:35:41,252 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2022-01-19 09:35:41,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-01-19 09:35:41,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-01-19 09:35:41,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:41,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-01-19 09:35:41,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,253 INFO L186 Difference]: Start difference. First operand has 90 places, 74 transitions, 181 flow. Second operand 3 states and 247 transitions. [2022-01-19 09:35:41,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 225 flow [2022-01-19 09:35:41,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 78 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:35:41,253 INFO L242 Difference]: Finished difference. Result has 93 places, 75 transitions, 193 flow [2022-01-19 09:35:41,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=93, PETRI_TRANSITIONS=75} [2022-01-19 09:35:41,254 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2022-01-19 09:35:41,254 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 75 transitions, 193 flow [2022-01-19 09:35:41,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:41,254 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:41,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-19 09:35:41,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1335463192, now seen corresponding path program 1 times [2022-01-19 09:35:41,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:41,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849020280] [2022-01-19 09:35:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:41,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:35:41,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849020280] [2022-01-19 09:35:41,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849020280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:35:41,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:35:41,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:35:41,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390190968] [2022-01-19 09:35:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:35:41,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:35:41,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:35:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:35:41,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 101 [2022-01-19 09:35:41,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 75 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:41,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 101 [2022-01-19 09:35:41,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:41,470 INFO L129 PetriNetUnfolder]: 1383/3162 cut-off events. [2022-01-19 09:35:41,470 INFO L130 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-01-19 09:35:41,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5498 conditions, 3162 events. 1383/3162 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22164 event pairs, 924 based on Foata normal form. 7/3043 useless extension candidates. Maximal degree in co-relation 5486. Up to 1878 conditions per place. [2022-01-19 09:35:41,495 INFO L132 encePairwiseOnDemand]: 92/101 looper letters, 22 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2022-01-19 09:35:41,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 309 flow [2022-01-19 09:35:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:35:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:35:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-01-19 09:35:41,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2022-01-19 09:35:41,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-01-19 09:35:41,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-01-19 09:35:41,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:41,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-01-19 09:35:41,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,497 INFO L186 Difference]: Start difference. First operand has 93 places, 75 transitions, 193 flow. Second operand 3 states and 247 transitions. [2022-01-19 09:35:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 309 flow [2022-01-19 09:35:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 88 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:41,498 INFO L242 Difference]: Finished difference. Result has 95 places, 82 transitions, 245 flow [2022-01-19 09:35:41,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2022-01-19 09:35:41,499 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2022-01-19 09:35:41,499 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 245 flow [2022-01-19 09:35:41,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:41,500 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:41,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-19 09:35:41,500 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash -446134130, now seen corresponding path program 1 times [2022-01-19 09:35:41,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409091714] [2022-01-19 09:35:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:41,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:41,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409091714] [2022-01-19 09:35:41,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409091714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943474431] [2022-01-19 09:35:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:41,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:41,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:41,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 09:35:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:35:41,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:41,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943474431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:41,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:41,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-19 09:35:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460342354] [2022-01-19 09:35:41,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:41,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 09:35:41,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 09:35:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-19 09:35:41,683 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 101 [2022-01-19 09:35:41,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 245 flow. Second operand has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:41,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 101 [2022-01-19 09:35:41,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:41,899 INFO L129 PetriNetUnfolder]: 1060/2258 cut-off events. [2022-01-19 09:35:41,899 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 09:35:41,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3793 conditions, 2258 events. 1060/2258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14826 event pairs, 722 based on Foata normal form. 2/2044 useless extension candidates. Maximal degree in co-relation 3780. Up to 1431 conditions per place. [2022-01-19 09:35:41,913 INFO L132 encePairwiseOnDemand]: 95/101 looper letters, 17 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2022-01-19 09:35:41,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 92 transitions, 319 flow [2022-01-19 09:35:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:35:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:35:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 703 transitions. [2022-01-19 09:35:41,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733773377337734 [2022-01-19 09:35:41,914 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 703 transitions. [2022-01-19 09:35:41,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 703 transitions. [2022-01-19 09:35:41,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:41,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 703 transitions. [2022-01-19 09:35:41,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.11111111111111) internal successors, (703), 9 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,916 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,916 INFO L186 Difference]: Start difference. First operand has 95 places, 82 transitions, 245 flow. Second operand 9 states and 703 transitions. [2022-01-19 09:35:41,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 92 transitions, 319 flow [2022-01-19 09:35:41,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 92 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:41,918 INFO L242 Difference]: Finished difference. Result has 105 places, 88 transitions, 287 flow [2022-01-19 09:35:41,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2022-01-19 09:35:41,918 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 16 predicate places. [2022-01-19 09:35:41,918 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 287 flow [2022-01-19 09:35:41,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:41,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:41,919 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:41,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:42,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-19 09:35:42,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1229042553, now seen corresponding path program 1 times [2022-01-19 09:35:42,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:42,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982991955] [2022-01-19 09:35:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:42,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:42,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:42,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982991955] [2022-01-19 09:35:42,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982991955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:42,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429742868] [2022-01-19 09:35:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:42,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:42,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:42,207 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:42,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 09:35:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:42,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 09:35:42,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:42,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-19 09:35:42,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429742868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:42,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:42,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-19 09:35:42,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800026649] [2022-01-19 09:35:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:42,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 09:35:42,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 09:35:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-19 09:35:42,496 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 101 [2022-01-19 09:35:42,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 287 flow. Second operand has 15 states, 15 states have (on average 65.6) internal successors, (984), 15 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:42,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:42,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 101 [2022-01-19 09:35:42,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:44,767 INFO L129 PetriNetUnfolder]: 13197/24157 cut-off events. [2022-01-19 09:35:44,767 INFO L130 PetriNetUnfolder]: For 13012/13148 co-relation queries the response was YES. [2022-01-19 09:35:44,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61101 conditions, 24157 events. 13197/24157 cut-off events. For 13012/13148 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 193276 event pairs, 2292 based on Foata normal form. 125/24282 useless extension candidates. Maximal degree in co-relation 61086. Up to 12355 conditions per place. [2022-01-19 09:35:44,949 INFO L132 encePairwiseOnDemand]: 86/101 looper letters, 106 selfloop transitions, 90 changer transitions 0/246 dead transitions. [2022-01-19 09:35:44,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 246 transitions, 1433 flow [2022-01-19 09:35:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 09:35:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 09:35:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1364 transitions. [2022-01-19 09:35:44,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7107868681605003 [2022-01-19 09:35:44,951 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1364 transitions. [2022-01-19 09:35:44,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1364 transitions. [2022-01-19 09:35:44,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:44,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1364 transitions. [2022-01-19 09:35:44,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.78947368421052) internal successors, (1364), 19 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:44,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 101.0) internal successors, (2020), 20 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:44,954 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 101.0) internal successors, (2020), 20 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:44,954 INFO L186 Difference]: Start difference. First operand has 105 places, 88 transitions, 287 flow. Second operand 19 states and 1364 transitions. [2022-01-19 09:35:44,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 246 transitions, 1433 flow [2022-01-19 09:35:44,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 246 transitions, 1405 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-01-19 09:35:44,976 INFO L242 Difference]: Finished difference. Result has 124 places, 162 transitions, 828 flow [2022-01-19 09:35:44,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=828, PETRI_PLACES=124, PETRI_TRANSITIONS=162} [2022-01-19 09:35:44,977 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 35 predicate places. [2022-01-19 09:35:44,977 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 162 transitions, 828 flow [2022-01-19 09:35:44,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.6) internal successors, (984), 15 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:44,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:44,977 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:45,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:45,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:45,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:45,195 INFO L85 PathProgramCache]: Analyzing trace with hash -329000904, now seen corresponding path program 1 times [2022-01-19 09:35:45,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:45,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261690782] [2022-01-19 09:35:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:45,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:35:45,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:45,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261690782] [2022-01-19 09:35:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261690782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:45,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029468565] [2022-01-19 09:35:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:45,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:45,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:45,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:45,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 09:35:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-19 09:35:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:35:45,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:35:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029468565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:45,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:45,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-19 09:35:45,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119769771] [2022-01-19 09:35:45,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:45,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 09:35:45,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 09:35:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-19 09:35:45,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-01-19 09:35:45,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 162 transitions, 828 flow. Second operand has 22 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:45,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:45,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-01-19 09:35:45,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:35:52,770 INFO L129 PetriNetUnfolder]: 33114/56367 cut-off events. [2022-01-19 09:35:52,770 INFO L130 PetriNetUnfolder]: For 112010/112014 co-relation queries the response was YES. [2022-01-19 09:35:53,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202824 conditions, 56367 events. 33114/56367 cut-off events. For 112010/112014 co-relation queries the response was YES. Maximal size of possible extension queue 1831. Compared 477087 event pairs, 3235 based on Foata normal form. 356/56723 useless extension candidates. Maximal degree in co-relation 202806. Up to 29173 conditions per place. [2022-01-19 09:35:53,518 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 329 selfloop transitions, 493 changer transitions 0/877 dead transitions. [2022-01-19 09:35:53,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 877 transitions, 7071 flow [2022-01-19 09:35:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-19 09:35:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-01-19 09:35:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5200 transitions. [2022-01-19 09:35:53,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6686382924006686 [2022-01-19 09:35:53,522 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5200 transitions. [2022-01-19 09:35:53,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5200 transitions. [2022-01-19 09:35:53,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:35:53,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5200 transitions. [2022-01-19 09:35:53,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 67.53246753246754) internal successors, (5200), 77 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:53,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 101.0) internal successors, (7878), 78 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:53,535 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 101.0) internal successors, (7878), 78 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:53,535 INFO L186 Difference]: Start difference. First operand has 124 places, 162 transitions, 828 flow. Second operand 77 states and 5200 transitions. [2022-01-19 09:35:53,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 877 transitions, 7071 flow [2022-01-19 09:35:53,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 877 transitions, 7049 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-01-19 09:35:53,742 INFO L242 Difference]: Finished difference. Result has 221 places, 607 transitions, 5266 flow [2022-01-19 09:35:53,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=5266, PETRI_PLACES=221, PETRI_TRANSITIONS=607} [2022-01-19 09:35:53,743 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 132 predicate places. [2022-01-19 09:35:53,743 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 607 transitions, 5266 flow [2022-01-19 09:35:53,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:53,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:35:53,744 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:35:53,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 09:35:53,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-19 09:35:53,961 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:35:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:35:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1661907186, now seen corresponding path program 1 times [2022-01-19 09:35:53,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:35:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845257699] [2022-01-19 09:35:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:53,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:35:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 09:35:54,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:35:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845257699] [2022-01-19 09:35:54,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845257699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:35:54,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414263100] [2022-01-19 09:35:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:35:54,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:35:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:35:54,076 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:35:54,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 09:35:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:35:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 09:35:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:35:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 09:35:54,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:35:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 09:35:54,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414263100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:35:54,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:35:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-19 09:35:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500122097] [2022-01-19 09:35:54,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:35:54,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 09:35:54,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:35:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 09:35:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-19 09:35:54,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-01-19 09:35:54,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 607 transitions, 5266 flow. Second operand has 24 states, 24 states have (on average 65.20833333333333) internal successors, (1565), 24 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:35:54,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:35:54,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-01-19 09:35:54,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:36:15,924 INFO L129 PetriNetUnfolder]: 71642/126395 cut-off events. [2022-01-19 09:36:15,924 INFO L130 PetriNetUnfolder]: For 1086474/1086524 co-relation queries the response was YES. [2022-01-19 09:36:17,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 653814 conditions, 126395 events. 71642/126395 cut-off events. For 1086474/1086524 co-relation queries the response was YES. Maximal size of possible extension queue 4264. Compared 1242143 event pairs, 4647 based on Foata normal form. 466/126857 useless extension candidates. Maximal degree in co-relation 653771. Up to 58289 conditions per place. [2022-01-19 09:36:18,405 INFO L132 encePairwiseOnDemand]: 84/101 looper letters, 449 selfloop transitions, 1035 changer transitions 0/1581 dead transitions. [2022-01-19 09:36:18,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1581 transitions, 17882 flow [2022-01-19 09:36:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 09:36:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 09:36:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4408 transitions. [2022-01-19 09:36:18,411 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6714394516374714 [2022-01-19 09:36:18,411 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4408 transitions. [2022-01-19 09:36:18,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4408 transitions. [2022-01-19 09:36:18,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:36:18,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4408 transitions. [2022-01-19 09:36:18,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 67.81538461538462) internal successors, (4408), 65 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:36:18,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 101.0) internal successors, (6666), 66 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:36:18,420 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 101.0) internal successors, (6666), 66 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:36:18,420 INFO L186 Difference]: Start difference. First operand has 221 places, 607 transitions, 5266 flow. Second operand 65 states and 4408 transitions. [2022-01-19 09:36:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1581 transitions, 17882 flow [2022-01-19 09:36:28,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1581 transitions, 17488 flow, removed 126 selfloop flow, removed 12 redundant places. [2022-01-19 09:36:28,085 INFO L242 Difference]: Finished difference. Result has 281 places, 1317 transitions, 14182 flow [2022-01-19 09:36:28,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=5043, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=14182, PETRI_PLACES=281, PETRI_TRANSITIONS=1317} [2022-01-19 09:36:28,086 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 192 predicate places. [2022-01-19 09:36:28,086 INFO L470 AbstractCegarLoop]: Abstraction has has 281 places, 1317 transitions, 14182 flow [2022-01-19 09:36:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 65.20833333333333) internal successors, (1565), 24 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:36:28,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:36:28,087 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:36:28,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 09:36:28,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-19 09:36:28,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:36:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:36:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash -431640834, now seen corresponding path program 1 times [2022-01-19 09:36:28,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:36:28,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117790840] [2022-01-19 09:36:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:36:28,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:36:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:36:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:36:28,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:36:28,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117790840] [2022-01-19 09:36:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117790840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:36:28,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448048171] [2022-01-19 09:36:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:36:28,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:36:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:36:28,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:36:28,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 09:36:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:36:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 09:36:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:36:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:36:28,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:36:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:36:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448048171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:36:28,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:36:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-01-19 09:36:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966430265] [2022-01-19 09:36:28,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:36:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-19 09:36:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:36:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-19 09:36:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-01-19 09:36:28,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-01-19 09:36:28,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1317 transitions, 14182 flow. Second operand has 28 states, 28 states have (on average 65.10714285714286) internal successors, (1823), 28 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:36:28,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:36:28,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-01-19 09:36:28,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:37:18,427 INFO L129 PetriNetUnfolder]: 141331/236130 cut-off events. [2022-01-19 09:37:18,427 INFO L130 PetriNetUnfolder]: For 3600202/3600607 co-relation queries the response was YES. [2022-01-19 09:37:22,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1344192 conditions, 236130 events. 141331/236130 cut-off events. For 3600202/3600607 co-relation queries the response was YES. Maximal size of possible extension queue 7929. Compared 2328579 event pairs, 2778 based on Foata normal form. 3387/239495 useless extension candidates. Maximal degree in co-relation 1344142. Up to 101639 conditions per place. [2022-01-19 09:37:24,110 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 1638 selfloop transitions, 4269 changer transitions 270/6304 dead transitions. [2022-01-19 09:37:24,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 6304 transitions, 89578 flow [2022-01-19 09:37:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-19 09:37:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-01-19 09:37:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 6108 transitions. [2022-01-19 09:37:24,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.679497163199466 [2022-01-19 09:37:24,114 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 6108 transitions. [2022-01-19 09:37:24,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 6108 transitions. [2022-01-19 09:37:24,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:37:24,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 6108 transitions. [2022-01-19 09:37:24,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 68.62921348314607) internal successors, (6108), 89 states have internal predecessors, (6108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:37:24,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 101.0) internal successors, (9090), 90 states have internal predecessors, (9090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:37:24,155 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 101.0) internal successors, (9090), 90 states have internal predecessors, (9090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:37:24,155 INFO L186 Difference]: Start difference. First operand has 281 places, 1317 transitions, 14182 flow. Second operand 89 states and 6108 transitions. [2022-01-19 09:37:24,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 6304 transitions, 89578 flow [2022-01-19 09:38:09,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 6304 transitions, 88760 flow, removed 370 selfloop flow, removed 12 redundant places. [2022-01-19 09:38:09,587 INFO L242 Difference]: Finished difference. Result has 383 places, 4804 transitions, 68914 flow [2022-01-19 09:38:09,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=13918, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=68914, PETRI_PLACES=383, PETRI_TRANSITIONS=4804} [2022-01-19 09:38:09,588 INFO L334 CegarLoopForPetriNet]: 89 programPoint places, 294 predicate places. [2022-01-19 09:38:09,588 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 4804 transitions, 68914 flow [2022-01-19 09:38:09,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 65.10714285714286) internal successors, (1823), 28 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:38:09,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:38:09,589 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:38:09,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 09:38:09,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:38:09,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-19 09:38:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:38:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1905410694, now seen corresponding path program 1 times [2022-01-19 09:38:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:38:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006353212] [2022-01-19 09:38:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:38:09,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:38:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:38:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-19 09:38:09,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:38:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006353212] [2022-01-19 09:38:09,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006353212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:38:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431444284] [2022-01-19 09:38:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:38:09,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:38:09,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:38:09,910 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:38:09,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 09:38:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:38:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 09:38:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:38:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-19 09:38:10,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:38:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-19 09:38:10,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431444284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:38:10,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:38:10,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-19 09:38:10,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59408292] [2022-01-19 09:38:10,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:38:10,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 09:38:10,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:38:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 09:38:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-01-19 09:38:10,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-01-19 09:38:10,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 4804 transitions, 68914 flow. Second operand has 32 states, 32 states have (on average 64.96875) internal successors, (2079), 32 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:38:10,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:38:10,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-01-19 09:38:10,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand