/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 06:57:59,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 06:57:59,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 06:57:59,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 06:57:59,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 06:57:59,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 06:57:59,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 06:57:59,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 06:57:59,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 06:57:59,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 06:57:59,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 06:57:59,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 06:57:59,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 06:57:59,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 06:57:59,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 06:57:59,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 06:57:59,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 06:57:59,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 06:57:59,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 06:57:59,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 06:57:59,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 06:57:59,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 06:57:59,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 06:57:59,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 06:57:59,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 06:57:59,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-13 06:57:59,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-13 06:57:59,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-13 06:57:59,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-13 06:57:59,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-13 06:57:59,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-13 06:57:59,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-13 06:57:59,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-13 06:57:59,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 06:57:59,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 06:57:59,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 06:57:59,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-13 06:57:59,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 06:57:59,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 06:57:59,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 06:57:59,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 06:57:59,934 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 06:57:59,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 06:57:59,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 06:57:59,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 06:57:59,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 06:57:59,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 06:57:59,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 06:57:59,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 06:57:59,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 06:57:59,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 06:57:59,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 06:57:59,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 06:57:59,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 06:58:00,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 06:58:00,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 06:58:00,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 06:58:00,174 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-13 06:58:00,175 INFO L275 PluginConnector]: CDTParser initialized [2021-06-13 06:58:00,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2021-06-13 06:58:00,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d8947d0/542aae5e64d74893916a77481e323ebd/FLAG9adfcd19e [2021-06-13 06:58:00,540 INFO L306 CDTParser]: Found 1 translation units. [2021-06-13 06:58:00,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2021-06-13 06:58:00,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d8947d0/542aae5e64d74893916a77481e323ebd/FLAG9adfcd19e [2021-06-13 06:58:00,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d8947d0/542aae5e64d74893916a77481e323ebd [2021-06-13 06:58:00,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 06:58:00,941 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-13 06:58:00,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-13 06:58:00,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-13 06:58:00,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-13 06:58:00,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.06 06:58:00" (1/1) ... [2021-06-13 06:58:00,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4423c92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:00, skipping insertion in model container [2021-06-13 06:58:00,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.06 06:58:00" (1/1) ... [2021-06-13 06:58:00,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-13 06:58:00,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-13 06:58:01,091 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-06-13 06:58:01,202 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2021-06-13 06:58:01,207 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] [2021-06-13 06:58:01,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-13 06:58:01,219 INFO L203 MainTranslator]: Completed pre-run [2021-06-13 06:58:01,264 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-06-13 06:58:01,279 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[31505,31518] [2021-06-13 06:58:01,282 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i[32915,32928] [2021-06-13 06:58:01,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-13 06:58:01,335 INFO L208 MainTranslator]: Completed translation [2021-06-13 06:58:01,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01 WrapperNode [2021-06-13 06:58:01,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-13 06:58:01,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 06:58:01,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 06:58:01,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 06:58:01,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 06:58:01,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 06:58:01,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 06:58:01,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 06:58:01,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... [2021-06-13 06:58:01,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 06:58:01,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 06:58:01,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 06:58:01,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 06:58:01,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 06:58:01,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-13 06:58:01,449 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-06-13 06:58:01,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-06-13 06:58:01,450 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-06-13 06:58:01,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-06-13 06:58:01,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-13 06:58:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-13 06:58:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-13 06:58:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-13 06:58:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-13 06:58:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-13 06:58:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 06:58:01,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 06:58:01,452 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 06:58:01,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 06:58:01,750 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-06-13 06:58:01,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 06:58:01 BoogieIcfgContainer [2021-06-13 06:58:01,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 06:58:01,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 06:58:01,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 06:58:01,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 06:58:01,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.06 06:58:00" (1/3) ... [2021-06-13 06:58:01,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b80ef91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 06:58:01, skipping insertion in model container [2021-06-13 06:58:01,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 06:58:01" (2/3) ... [2021-06-13 06:58:01,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b80ef91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 06:58:01, skipping insertion in model container [2021-06-13 06:58:01,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 06:58:01" (3/3) ... [2021-06-13 06:58:01,756 INFO L111 eAbstractionObserver]: Analyzing ICFG szymanski.i [2021-06-13 06:58:01,759 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 06:58:01,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-13 06:58:01,760 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 06:58:01,778 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,778 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,778 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,778 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,779 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,780 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,781 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,782 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,782 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,782 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,782 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,782 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,784 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,785 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,785 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,785 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,785 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,785 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,786 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,787 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,788 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,789 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,790 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,790 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,791 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,791 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,791 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,791 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,791 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,791 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,792 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,793 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,793 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,796 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,796 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,796 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,796 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,797 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,797 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,798 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,798 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,799 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,799 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,801 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,802 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,802 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,804 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,808 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,808 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,808 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,808 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,812 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,812 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,812 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,812 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,812 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 06:58:01,824 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-13 06:58:01,840 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-13 06:58:01,860 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 06:58:01,861 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 06:58:01,861 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 06:58:01,861 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 06:58:01,861 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 06:58:01,861 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 06:58:01,861 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 06:58:01,861 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2======== [2021-06-13 06:58:01,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:01,905 INFO L129 PetriNetUnfolder]: 21/115 cut-off events. [2021-06-13 06:58:01,905 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 06:58:01,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 115 events. 21/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2021-06-13 06:58:01,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:01,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-13 06:58:01,912 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-13 06:58:01,912 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 06:58:01,912 INFO L301 ceAbstractionStarter]: Result for error location thr2 was SAFE (1/5) [2021-06-13 06:58:01,913 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-13 06:58:01,915 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 06:58:01,915 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 06:58:01,915 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 06:58:01,915 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 06:58:01,915 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 06:58:01,915 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 06:58:01,915 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 06:58:01,915 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1======== [2021-06-13 06:58:01,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:01,930 INFO L129 PetriNetUnfolder]: 21/115 cut-off events. [2021-06-13 06:58:01,930 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 06:58:01,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 115 events. 21/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2021-06-13 06:58:01,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:01,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-13 06:58:01,931 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-13 06:58:01,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 06:58:01,932 INFO L301 ceAbstractionStarter]: Result for error location thr1 was SAFE (2/5) [2021-06-13 06:58:01,932 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-13 06:58:01,933 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 06:58:01,933 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 06:58:01,933 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 06:58:01,933 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 06:58:01,933 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 06:58:01,933 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 06:58:01,933 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 06:58:01,933 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-06-13 06:58:01,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:01,950 INFO L129 PetriNetUnfolder]: 21/115 cut-off events. [2021-06-13 06:58:01,950 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 06:58:01,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 115 events. 21/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2021-06-13 06:58:01,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:01,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 103 transitions, 218 flow [2021-06-13 06:58:01,963 INFO L129 PetriNetUnfolder]: 11/65 cut-off events. [2021-06-13 06:58:01,963 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 06:58:01,963 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:01,964 INFO L255 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] [2021-06-13 06:58:01,964 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2126233844, now seen corresponding path program 1 times [2021-06-13 06:58:01,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:01,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579226213] [2021-06-13 06:58:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:02,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:02,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:02,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579226213] [2021-06-13 06:58:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579226213] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:02,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:02,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-13 06:58:02,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720401546] [2021-06-13 06:58:02,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-13 06:58:02,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:02,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-13 06:58:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-13 06:58:02,139 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 115 [2021-06-13 06:58:02,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 218 flow. Second operand has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:02,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 115 [2021-06-13 06:58:02,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:02,164 INFO L129 PetriNetUnfolder]: 10/95 cut-off events. [2021-06-13 06:58:02,164 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 06:58:02,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 10/93 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2021-06-13 06:58:02,166 INFO L132 encePairwiseOnDemand]: 105/115 looper letters, 0 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2021-06-13 06:58:02,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 198 flow [2021-06-13 06:58:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-13 06:58:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-06-13 06:58:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2021-06-13 06:58:02,173 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9565217391304348 [2021-06-13 06:58:02,174 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2021-06-13 06:58:02,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2021-06-13 06:58:02,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:02,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2021-06-13 06:58:02,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 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) [2021-06-13 06:58:02,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,183 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,184 INFO L185 Difference]: Start difference. First operand has 89 places, 103 transitions, 218 flow. Second operand 2 states and 220 transitions. [2021-06-13 06:58:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 198 flow [2021-06-13 06:58:02,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 06:58:02,191 INFO L241 Difference]: Finished difference. Result has 86 places, 93 transitions, 190 flow [2021-06-13 06:58:02,193 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2021-06-13 06:58:02,193 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2021-06-13 06:58:02,193 INFO L482 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 190 flow [2021-06-13 06:58:02,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,194 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:02,194 INFO L255 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] [2021-06-13 06:58:02,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 06:58:02,194 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2126204053, now seen corresponding path program 1 times [2021-06-13 06:58:02,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:02,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985788695] [2021-06-13 06:58:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:02,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:02,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:02,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985788695] [2021-06-13 06:58:02,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985788695] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:02,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:02,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 06:58:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443582124] [2021-06-13 06:58:02,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 06:58:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 06:58:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 06:58:02,280 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 115 [2021-06-13 06:58:02,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:02,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 115 [2021-06-13 06:58:02,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:02,340 INFO L129 PetriNetUnfolder]: 22/170 cut-off events. [2021-06-13 06:58:02,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 06:58:02,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 170 events. 22/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 520 event pairs, 2 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 200. Up to 18 conditions per place. [2021-06-13 06:58:02,342 INFO L132 encePairwiseOnDemand]: 110/115 looper letters, 6 selfloop transitions, 3 changer transitions 1/96 dead transitions. [2021-06-13 06:58:02,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 96 transitions, 216 flow [2021-06-13 06:58:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 06:58:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 06:58:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2021-06-13 06:58:02,344 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8869565217391304 [2021-06-13 06:58:02,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2021-06-13 06:58:02,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2021-06-13 06:58:02,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:02,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2021-06-13 06:58:02,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,347 INFO L185 Difference]: Start difference. First operand has 86 places, 93 transitions, 190 flow. Second operand 3 states and 306 transitions. [2021-06-13 06:58:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 96 transitions, 216 flow [2021-06-13 06:58:02,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 96 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:02,349 INFO L241 Difference]: Finished difference. Result has 90 places, 94 transitions, 210 flow [2021-06-13 06:58:02,349 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2021-06-13 06:58:02,350 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 1 predicate places. [2021-06-13 06:58:02,350 INFO L482 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 210 flow [2021-06-13 06:58:02,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,350 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:02,350 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:02,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 06:58:02,350 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash -429576492, now seen corresponding path program 1 times [2021-06-13 06:58:02,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:02,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723764084] [2021-06-13 06:58:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:02,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:02,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-13 06:58:02,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:02,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723764084] [2021-06-13 06:58:02,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723764084] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:02,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:02,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871381417] [2021-06-13 06:58:02,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:02,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:02,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:02,414 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:02,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:02,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:02,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:02,609 INFO L129 PetriNetUnfolder]: 162/657 cut-off events. [2021-06-13 06:58:02,609 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-06-13 06:58:02,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 657 events. 162/657 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3972 event pairs, 61 based on Foata normal form. 0/570 useless extension candidates. Maximal degree in co-relation 955. Up to 174 conditions per place. [2021-06-13 06:58:02,613 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 31 selfloop transitions, 5 changer transitions 34/135 dead transitions. [2021-06-13 06:58:02,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 427 flow [2021-06-13 06:58:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2021-06-13 06:58:02,631 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8208695652173913 [2021-06-13 06:58:02,631 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2021-06-13 06:58:02,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2021-06-13 06:58:02,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:02,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2021-06-13 06:58:02,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,635 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,635 INFO L185 Difference]: Start difference. First operand has 90 places, 94 transitions, 210 flow. Second operand 5 states and 472 transitions. [2021-06-13 06:58:02,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 427 flow [2021-06-13 06:58:02,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-13 06:58:02,637 INFO L241 Difference]: Finished difference. Result has 95 places, 93 transitions, 262 flow [2021-06-13 06:58:02,638 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2021-06-13 06:58:02,638 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2021-06-13 06:58:02,638 INFO L482 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 262 flow [2021-06-13 06:58:02,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,638 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:02,638 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:02,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 06:58:02,638 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1570923858, now seen corresponding path program 2 times [2021-06-13 06:58:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:02,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136143048] [2021-06-13 06:58:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:02,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:02,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:02,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:02,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136143048] [2021-06-13 06:58:02,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136143048] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:02,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:02,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901437126] [2021-06-13 06:58:02,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:02,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:02,683 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:02,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:02,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:02,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:02,788 INFO L129 PetriNetUnfolder]: 183/669 cut-off events. [2021-06-13 06:58:02,788 INFO L130 PetriNetUnfolder]: For 290/291 co-relation queries the response was YES. [2021-06-13 06:58:02,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 669 events. 183/669 cut-off events. For 290/291 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3964 event pairs, 34 based on Foata normal form. 10/601 useless extension candidates. Maximal degree in co-relation 1147. Up to 93 conditions per place. [2021-06-13 06:58:02,791 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 52 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2021-06-13 06:58:02,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 143 transitions, 628 flow [2021-06-13 06:58:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2021-06-13 06:58:02,793 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8243478260869566 [2021-06-13 06:58:02,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2021-06-13 06:58:02,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2021-06-13 06:58:02,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:02,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2021-06-13 06:58:02,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,797 INFO L185 Difference]: Start difference. First operand has 95 places, 93 transitions, 262 flow. Second operand 5 states and 474 transitions. [2021-06-13 06:58:02,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 143 transitions, 628 flow [2021-06-13 06:58:02,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 568 flow, removed 30 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:02,801 INFO L241 Difference]: Finished difference. Result has 100 places, 116 transitions, 493 flow [2021-06-13 06:58:02,801 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2021-06-13 06:58:02,801 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 11 predicate places. [2021-06-13 06:58:02,801 INFO L482 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 493 flow [2021-06-13 06:58:02,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,802 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:02,802 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:02,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 06:58:02,802 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:02,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1719374840, now seen corresponding path program 3 times [2021-06-13 06:58:02,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:02,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439284517] [2021-06-13 06:58:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:02,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:02,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:02,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:02,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:02,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:02,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439284517] [2021-06-13 06:58:02,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439284517] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:02,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:02,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:02,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494208506] [2021-06-13 06:58:02,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:02,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:02,830 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:02,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 493 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:02,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:02,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:02,979 INFO L129 PetriNetUnfolder]: 237/872 cut-off events. [2021-06-13 06:58:02,979 INFO L130 PetriNetUnfolder]: For 1232/1259 co-relation queries the response was YES. [2021-06-13 06:58:02,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 872 events. 237/872 cut-off events. For 1232/1259 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5744 event pairs, 42 based on Foata normal form. 20/775 useless extension candidates. Maximal degree in co-relation 1849. Up to 205 conditions per place. [2021-06-13 06:58:02,985 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 71 selfloop transitions, 25 changer transitions 1/162 dead transitions. [2021-06-13 06:58:02,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 162 transitions, 960 flow [2021-06-13 06:58:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2021-06-13 06:58:02,986 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8173913043478261 [2021-06-13 06:58:02,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2021-06-13 06:58:02,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2021-06-13 06:58:02,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:02,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2021-06-13 06:58:02,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,989 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,989 INFO L185 Difference]: Start difference. First operand has 100 places, 116 transitions, 493 flow. Second operand 5 states and 470 transitions. [2021-06-13 06:58:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 162 transitions, 960 flow [2021-06-13 06:58:02,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 946 flow, removed 7 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:02,996 INFO L241 Difference]: Finished difference. Result has 108 places, 137 transitions, 790 flow [2021-06-13 06:58:02,996 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=790, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2021-06-13 06:58:02,996 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 19 predicate places. [2021-06-13 06:58:02,996 INFO L482 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 790 flow [2021-06-13 06:58:02,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:02,996 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:02,996 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:02,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 06:58:02,997 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash -178883416, now seen corresponding path program 4 times [2021-06-13 06:58:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:02,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411046602] [2021-06-13 06:58:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-13 06:58:03,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411046602] [2021-06-13 06:58:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411046602] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:03,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140973697] [2021-06-13 06:58:03,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:03,055 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:03,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 790 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:03,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,203 INFO L129 PetriNetUnfolder]: 311/1050 cut-off events. [2021-06-13 06:58:03,204 INFO L130 PetriNetUnfolder]: For 1234/1273 co-relation queries the response was YES. [2021-06-13 06:58:03,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2529 conditions, 1050 events. 311/1050 cut-off events. For 1234/1273 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7341 event pairs, 70 based on Foata normal form. 13/941 useless extension candidates. Maximal degree in co-relation 2513. Up to 392 conditions per place. [2021-06-13 06:58:03,208 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 0 selfloop transitions, 0 changer transitions 169/169 dead transitions. [2021-06-13 06:58:03,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 169 transitions, 950 flow [2021-06-13 06:58:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 469 transitions. [2021-06-13 06:58:03,210 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8156521739130435 [2021-06-13 06:58:03,210 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 469 transitions. [2021-06-13 06:58:03,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 469 transitions. [2021-06-13 06:58:03,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 469 transitions. [2021-06-13 06:58:03,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,212 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,212 INFO L185 Difference]: Start difference. First operand has 108 places, 137 transitions, 790 flow. Second operand 5 states and 469 transitions. [2021-06-13 06:58:03,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 169 transitions, 950 flow [2021-06-13 06:58:03,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 169 transitions, 920 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:03,219 INFO L241 Difference]: Finished difference. Result has 110 places, 0 transitions, 0 flow [2021-06-13 06:58:03,219 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=110, PETRI_TRANSITIONS=0} [2021-06-13 06:58:03,219 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 21 predicate places. [2021-06-13 06:58:03,219 INFO L482 AbstractCegarLoop]: Abstraction has has 110 places, 0 transitions, 0 flow [2021-06-13 06:58:03,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 06:58:03,220 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (3/5) [2021-06-13 06:58:03,221 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 06:58:03,222 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 06:58:03,222 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 06:58:03,222 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 06:58:03,222 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 06:58:03,222 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 06:58:03,223 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 06:58:03,223 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 06:58:03,223 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 06:58:03,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:03,231 INFO L129 PetriNetUnfolder]: 21/115 cut-off events. [2021-06-13 06:58:03,231 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 06:58:03,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 115 events. 21/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2021-06-13 06:58:03,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:03,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-13 06:58:03,232 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-13 06:58:03,232 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 06:58:03,232 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (4/5) [2021-06-13 06:58:03,232 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-13 06:58:03,233 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 06:58:03,233 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 06:58:03,233 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 06:58:03,233 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 06:58:03,233 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 06:58:03,233 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 06:58:03,233 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 06:58:03,233 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork1======== [2021-06-13 06:58:03,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:03,241 INFO L129 PetriNetUnfolder]: 21/115 cut-off events. [2021-06-13 06:58:03,242 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 06:58:03,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 115 events. 21/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2021-06-13 06:58:03,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 115 transitions, 252 flow [2021-06-13 06:58:03,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 103 transitions, 218 flow [2021-06-13 06:58:03,246 INFO L129 PetriNetUnfolder]: 19/92 cut-off events. [2021-06-13 06:58:03,247 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-13 06:58:03,247 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:03,247 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:03,247 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2102570016, now seen corresponding path program 1 times [2021-06-13 06:58:03,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:03,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843138718] [2021-06-13 06:58:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843138718] [2021-06-13 06:58:03,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843138718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-13 06:58:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091080415] [2021-06-13 06:58:03,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-13 06:58:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-13 06:58:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-13 06:58:03,279 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 115 [2021-06-13 06:58:03,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 218 flow. Second operand has 2 states, 2 states have (on average 106.0) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 115 [2021-06-13 06:58:03,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,293 INFO L129 PetriNetUnfolder]: 10/95 cut-off events. [2021-06-13 06:58:03,293 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 06:58:03,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 10/93 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2021-06-13 06:58:03,294 INFO L132 encePairwiseOnDemand]: 105/115 looper letters, 0 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2021-06-13 06:58:03,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 198 flow [2021-06-13 06:58:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-13 06:58:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-06-13 06:58:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2021-06-13 06:58:03,295 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9565217391304348 [2021-06-13 06:58:03,295 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2021-06-13 06:58:03,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2021-06-13 06:58:03,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2021-06-13 06:58:03,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 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) [2021-06-13 06:58:03,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,296 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,296 INFO L185 Difference]: Start difference. First operand has 89 places, 103 transitions, 218 flow. Second operand 2 states and 220 transitions. [2021-06-13 06:58:03,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 198 flow [2021-06-13 06:58:03,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 06:58:03,298 INFO L241 Difference]: Finished difference. Result has 86 places, 93 transitions, 190 flow [2021-06-13 06:58:03,299 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2021-06-13 06:58:03,299 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2021-06-13 06:58:03,299 INFO L482 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 190 flow [2021-06-13 06:58:03,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 106.0) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,299 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:03,299 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:03,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-13 06:58:03,299 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1906086302, now seen corresponding path program 1 times [2021-06-13 06:58:03,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:03,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708505688] [2021-06-13 06:58:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-13 06:58:03,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708505688] [2021-06-13 06:58:03,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708505688] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 06:58:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352147509] [2021-06-13 06:58:03,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 06:58:03,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 06:58:03,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 06:58:03,328 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 115 [2021-06-13 06:58:03,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 115 [2021-06-13 06:58:03,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,345 INFO L129 PetriNetUnfolder]: 22/170 cut-off events. [2021-06-13 06:58:03,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 06:58:03,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 170 events. 22/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 523 event pairs, 2 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 200. Up to 19 conditions per place. [2021-06-13 06:58:03,346 INFO L132 encePairwiseOnDemand]: 111/115 looper letters, 7 selfloop transitions, 2 changer transitions 1/96 dead transitions. [2021-06-13 06:58:03,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 96 transitions, 216 flow [2021-06-13 06:58:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 06:58:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 06:58:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2021-06-13 06:58:03,348 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8869565217391304 [2021-06-13 06:58:03,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2021-06-13 06:58:03,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2021-06-13 06:58:03,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2021-06-13 06:58:03,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,349 INFO L185 Difference]: Start difference. First operand has 86 places, 93 transitions, 190 flow. Second operand 3 states and 306 transitions. [2021-06-13 06:58:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 96 transitions, 216 flow [2021-06-13 06:58:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 96 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:03,350 INFO L241 Difference]: Finished difference. Result has 89 places, 94 transitions, 204 flow [2021-06-13 06:58:03,351 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2021-06-13 06:58:03,351 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 0 predicate places. [2021-06-13 06:58:03,351 INFO L482 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 204 flow [2021-06-13 06:58:03,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,351 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:03,351 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:03,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-13 06:58:03,351 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1950418830, now seen corresponding path program 1 times [2021-06-13 06:58:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:03,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179338064] [2021-06-13 06:58:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-13 06:58:03,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179338064] [2021-06-13 06:58:03,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179338064] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:03,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414965675] [2021-06-13 06:58:03,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:03,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:03,387 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:03,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:03,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,478 INFO L129 PetriNetUnfolder]: 149/608 cut-off events. [2021-06-13 06:58:03,478 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-06-13 06:58:03,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 608 events. 149/608 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3775 event pairs, 57 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 879. Up to 166 conditions per place. [2021-06-13 06:58:03,480 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 31 selfloop transitions, 5 changer transitions 33/134 dead transitions. [2021-06-13 06:58:03,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 416 flow [2021-06-13 06:58:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2021-06-13 06:58:03,482 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8191304347826087 [2021-06-13 06:58:03,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2021-06-13 06:58:03,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2021-06-13 06:58:03,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2021-06-13 06:58:03,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,484 INFO L185 Difference]: Start difference. First operand has 89 places, 94 transitions, 204 flow. Second operand 5 states and 471 transitions. [2021-06-13 06:58:03,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 416 flow [2021-06-13 06:58:03,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 134 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 06:58:03,486 INFO L241 Difference]: Finished difference. Result has 95 places, 93 transitions, 260 flow [2021-06-13 06:58:03,486 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2021-06-13 06:58:03,486 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2021-06-13 06:58:03,486 INFO L482 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 260 flow [2021-06-13 06:58:03,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,486 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:03,486 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:03,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-13 06:58:03,486 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:03,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1040413874, now seen corresponding path program 2 times [2021-06-13 06:58:03,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:03,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170902885] [2021-06-13 06:58:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,516 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170902885] [2021-06-13 06:58:03,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170902885] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:03,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047712138] [2021-06-13 06:58:03,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:03,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:03,522 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:03,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:03,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,611 INFO L129 PetriNetUnfolder]: 174/646 cut-off events. [2021-06-13 06:58:03,611 INFO L130 PetriNetUnfolder]: For 285/291 co-relation queries the response was YES. [2021-06-13 06:58:03,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 646 events. 174/646 cut-off events. For 285/291 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3991 event pairs, 32 based on Foata normal form. 9/580 useless extension candidates. Maximal degree in co-relation 1108. Up to 89 conditions per place. [2021-06-13 06:58:03,613 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 51 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2021-06-13 06:58:03,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 142 transitions, 621 flow [2021-06-13 06:58:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 473 transitions. [2021-06-13 06:58:03,614 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8226086956521739 [2021-06-13 06:58:03,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 473 transitions. [2021-06-13 06:58:03,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 473 transitions. [2021-06-13 06:58:03,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 473 transitions. [2021-06-13 06:58:03,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.6) internal successors, (473), 5 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) [2021-06-13 06:58:03,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,616 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,616 INFO L185 Difference]: Start difference. First operand has 95 places, 93 transitions, 260 flow. Second operand 5 states and 473 transitions. [2021-06-13 06:58:03,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 142 transitions, 621 flow [2021-06-13 06:58:03,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 561 flow, removed 30 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:03,629 INFO L241 Difference]: Finished difference. Result has 100 places, 116 transitions, 491 flow [2021-06-13 06:58:03,629 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2021-06-13 06:58:03,630 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 11 predicate places. [2021-06-13 06:58:03,630 INFO L482 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 491 flow [2021-06-13 06:58:03,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,630 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:03,630 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:03,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-13 06:58:03,630 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:03,631 INFO L82 PathProgramCache]: Analyzing trace with hash 101137510, now seen corresponding path program 3 times [2021-06-13 06:58:03,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:03,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571329949] [2021-06-13 06:58:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571329949] [2021-06-13 06:58:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571329949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:03,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051958370] [2021-06-13 06:58:03,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:03,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:03,658 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:03,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:03,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,767 INFO L129 PetriNetUnfolder]: 240/895 cut-off events. [2021-06-13 06:58:03,767 INFO L130 PetriNetUnfolder]: For 1184/1198 co-relation queries the response was YES. [2021-06-13 06:58:03,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 895 events. 240/895 cut-off events. For 1184/1198 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6231 event pairs, 38 based on Foata normal form. 19/787 useless extension candidates. Maximal degree in co-relation 1851. Up to 198 conditions per place. [2021-06-13 06:58:03,771 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 70 selfloop transitions, 25 changer transitions 1/161 dead transitions. [2021-06-13 06:58:03,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 953 flow [2021-06-13 06:58:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 469 transitions. [2021-06-13 06:58:03,773 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8156521739130435 [2021-06-13 06:58:03,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 469 transitions. [2021-06-13 06:58:03,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 469 transitions. [2021-06-13 06:58:03,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 469 transitions. [2021-06-13 06:58:03,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,775 INFO L185 Difference]: Start difference. First operand has 100 places, 116 transitions, 491 flow. Second operand 5 states and 469 transitions. [2021-06-13 06:58:03,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 953 flow [2021-06-13 06:58:03,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 161 transitions, 939 flow, removed 7 selfloop flow, removed 0 redundant places. [2021-06-13 06:58:03,780 INFO L241 Difference]: Finished difference. Result has 108 places, 137 transitions, 788 flow [2021-06-13 06:58:03,780 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=788, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2021-06-13 06:58:03,780 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 19 predicate places. [2021-06-13 06:58:03,780 INFO L482 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 788 flow [2021-06-13 06:58:03,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 06:58:03,781 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 06:58:03,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-13 06:58:03,781 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-13 06:58:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 06:58:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1582039046, now seen corresponding path program 4 times [2021-06-13 06:58:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 06:58:03,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246031509] [2021-06-13 06:58:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 06:58:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 06:58:03,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 06:58:03,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-13 06:58:03,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 06:58:03,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 06:58:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 06:58:03,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 06:58:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246031509] [2021-06-13 06:58:03,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246031509] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 06:58:03,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 06:58:03,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-13 06:58:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510700548] [2021-06-13 06:58:03,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 06:58:03,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 06:58:03,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 06:58:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 06:58:03,807 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 115 [2021-06-13 06:58:03,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 788 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 06:58:03,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 115 [2021-06-13 06:58:03,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 06:58:03,935 INFO L129 PetriNetUnfolder]: 313/1074 cut-off events. [2021-06-13 06:58:03,935 INFO L130 PetriNetUnfolder]: For 1300/1342 co-relation queries the response was YES. [2021-06-13 06:58:03,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 1074 events. 313/1074 cut-off events. For 1300/1342 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7475 event pairs, 75 based on Foata normal form. 7/962 useless extension candidates. Maximal degree in co-relation 2579. Up to 398 conditions per place. [2021-06-13 06:58:03,939 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 0 selfloop transitions, 0 changer transitions 169/169 dead transitions. [2021-06-13 06:58:03,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 169 transitions, 949 flow [2021-06-13 06:58:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-13 06:58:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-13 06:58:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2021-06-13 06:58:03,941 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8173913043478261 [2021-06-13 06:58:03,941 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2021-06-13 06:58:03,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2021-06-13 06:58:03,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 06:58:03,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2021-06-13 06:58:03,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,943 INFO L185 Difference]: Start difference. First operand has 108 places, 137 transitions, 788 flow. Second operand 5 states and 470 transitions. [2021-06-13 06:58:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 169 transitions, 949 flow [2021-06-13 06:58:03,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 169 transitions, 916 flow, removed 16 selfloop flow, removed 1 redundant places. [2021-06-13 06:58:03,948 INFO L241 Difference]: Finished difference. Result has 109 places, 0 transitions, 0 flow [2021-06-13 06:58:03,948 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=109, PETRI_TRANSITIONS=0} [2021-06-13 06:58:03,948 INFO L335 CegarLoopForPetriNet]: 89 programPoint places, 20 predicate places. [2021-06-13 06:58:03,949 INFO L482 AbstractCegarLoop]: Abstraction has has 109 places, 0 transitions, 0 flow [2021-06-13 06:58:03,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 06:58:03,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-13 06:58:03,949 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork1 was SAFE (5/5) [2021-06-13 06:58:03,949 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 06:58:03,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 06:58:03 BasicIcfg [2021-06-13 06:58:03,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 06:58:03,954 INFO L168 Benchmark]: Toolchain (without parser) took 3011.33 ms. Allocated memory was 181.4 MB in the beginning and 222.3 MB in the end (delta: 40.9 MB). Free memory was 143.4 MB in the beginning and 89.4 MB in the end (delta: 54.0 MB). Peak memory consumption was 95.3 MB. Max. memory is 8.0 GB. [2021-06-13 06:58:03,954 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 181.4 MB. Free memory is still 161.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 06:58:03,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.73 ms. Allocated memory is still 181.4 MB. Free memory was 143.2 MB in the beginning and 145.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. [2021-06-13 06:58:03,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.13 ms. Allocated memory is still 181.4 MB. Free memory was 145.2 MB in the beginning and 143.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-13 06:58:03,955 INFO L168 Benchmark]: Boogie Preprocessor took 16.24 ms. Allocated memory is still 181.4 MB. Free memory was 143.1 MB in the beginning and 142.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 06:58:03,955 INFO L168 Benchmark]: RCFGBuilder took 359.53 ms. Allocated memory is still 181.4 MB. Free memory was 141.5 MB in the beginning and 115.3 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-06-13 06:58:03,956 INFO L168 Benchmark]: TraceAbstraction took 2199.75 ms. Allocated memory was 181.4 MB in the beginning and 222.3 MB in the end (delta: 40.9 MB). Free memory was 114.8 MB in the beginning and 89.4 MB in the end (delta: 25.3 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2021-06-13 06:58:03,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 181.4 MB. Free memory is still 161.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 392.73 ms. Allocated memory is still 181.4 MB. Free memory was 143.2 MB in the beginning and 145.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.13 ms. Allocated memory is still 181.4 MB. Free memory was 145.2 MB in the beginning and 143.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.24 ms. Allocated memory is still 181.4 MB. Free memory was 143.1 MB in the beginning and 142.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 359.53 ms. Allocated memory is still 181.4 MB. Free memory was 141.5 MB in the beginning and 115.3 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2199.75 ms. Allocated memory was 181.4 MB in the beginning and 222.3 MB in the end (delta: 40.9 MB). Free memory was 114.8 MB in the beginning and 89.4 MB in the end (delta: 25.3 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 802]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 745]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr2 with 1 thread instances CFG has 5 procedures, 150 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 54.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 50.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1 with 1 thread instances CFG has 5 procedures, 150 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 17.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 150 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 10.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1287.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 807.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 172 SDtfs, 126 SDslu, 66 SDs, 0 SdLazy, 304 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 229.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=790occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.5ms SsaConstructionTime, 91.4ms SatisfiabilityAnalysisTime, 204.5ms InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 248 ConstructedInterpolants, 0 QuantifiedInterpolants, 310 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 150 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 10.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr2Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 150 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 716.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 515.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 171 SDtfs, 126 SDslu, 66 SDs, 0 SdLazy, 304 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 167.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=788occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.9ms SsaConstructionTime, 27.1ms SatisfiabilityAnalysisTime, 111.1ms InterpolantComputationTime, 266 NumberOfCodeBlocks, 266 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...