/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 16:24:54,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 16:24:54,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 16:24:54,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 16:24:54,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 16:24:54,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 16:24:54,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 16:24:54,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 16:24:54,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 16:24:54,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 16:24:54,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 16:24:54,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 16:24:54,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 16:24:54,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 16:24:54,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 16:24:54,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 16:24:54,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 16:24:54,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 16:24:54,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 16:24:54,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 16:24:54,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 16:24:54,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 16:24:54,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 16:24:54,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 16:24:54,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 16:24:54,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 16:24:54,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 16:24:54,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 16:24:54,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 16:24:54,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 16:24:54,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 16:24:54,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 16:24:54,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 16:24:54,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 16:24:54,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 16:24:54,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 16:24:54,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 16:24:54,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 16:24:54,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 16:24:54,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 16:24:54,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 16:24:54,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 16:24:54,978 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 16:24:54,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 16:24:54,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 16:24:54,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 16:24:54,983 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 16:24:54,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 16:24:54,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 16:24:54,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 16:24:54,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 16:24:54,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 16:24:54,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 16:24:54,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 16:24:54,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 16:24:54,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 16:24:54,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 16:24:54,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 16:24:54,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 16:24:54,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 16:24:54,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 16:24:54,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 16:24:54,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 16:24:54,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:24:54,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 16:24:54,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 16:24:54,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 16:24:54,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 16:24:54,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 16:24:54,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 16:24:54,994 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 16:24:54,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 16:24:55,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 16:24:55,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 16:24:55,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 16:24:55,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 16:24:55,331 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 16:24:55,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-11 16:24:55,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8c6d0a08/33c0397debe5418daab899b7cd106c7d/FLAG2bb2ca7c9 [2020-10-11 16:24:56,000 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 16:24:56,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-10-11 16:24:56,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8c6d0a08/33c0397debe5418daab899b7cd106c7d/FLAG2bb2ca7c9 [2020-10-11 16:24:56,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8c6d0a08/33c0397debe5418daab899b7cd106c7d [2020-10-11 16:24:56,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 16:24:56,264 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 16:24:56,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 16:24:56,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 16:24:56,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 16:24:56,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:24:56" (1/1) ... [2020-10-11 16:24:56,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:56, skipping insertion in model container [2020-10-11 16:24:56,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:24:56" (1/1) ... [2020-10-11 16:24:56,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 16:24:56,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 16:24:56,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:24:56,982 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 16:24:57,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:24:57,167 INFO L208 MainTranslator]: Completed translation [2020-10-11 16:24:57,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57 WrapperNode [2020-10-11 16:24:57,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 16:24:57,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 16:24:57,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 16:24:57,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 16:24:57,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 16:24:57,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 16:24:57,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 16:24:57,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 16:24:57,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (1/1) ... [2020-10-11 16:24:57,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 16:24:57,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 16:24:57,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 16:24:57,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 16:24:57,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (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 [2020-10-11 16:24:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 16:24:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 16:24:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 16:24:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-11 16:24:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-11 16:24:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 16:24:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-11 16:24:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 16:24:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 16:24:57,357 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 16:24:57,794 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 16:24:57,795 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-11 16:24:57,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:24:57 BoogieIcfgContainer [2020-10-11 16:24:57,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 16:24:57,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 16:24:57,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 16:24:57,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 16:24:57,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 04:24:56" (1/3) ... [2020-10-11 16:24:57,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1143e91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:24:57, skipping insertion in model container [2020-10-11 16:24:57,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:57" (2/3) ... [2020-10-11 16:24:57,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1143e91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:24:57, skipping insertion in model container [2020-10-11 16:24:57,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:24:57" (3/3) ... [2020-10-11 16:24:57,809 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-11 16:24:57,818 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 16:24:57,827 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 16:24:57,828 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 16:24:57,859 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,860 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,860 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,860 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,861 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,861 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,861 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,862 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,862 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,862 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,862 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,863 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,863 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,863 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,867 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,868 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,868 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,868 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,868 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,869 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,869 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,869 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,869 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,870 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,870 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,870 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,870 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,871 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,871 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,871 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,872 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,872 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,872 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,872 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,872 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,873 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,873 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,873 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,873 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,874 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,874 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,874 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,874 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,874 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,875 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,875 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,875 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,875 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,876 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,876 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,876 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,876 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,877 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,877 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,877 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,877 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,878 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,878 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,878 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,878 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,879 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,879 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,879 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,879 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,879 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,880 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,880 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,880 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,880 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,881 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,881 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,881 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,881 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,882 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,882 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,882 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,882 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,883 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,883 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,883 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,883 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,884 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,884 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,884 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,884 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,885 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,885 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,889 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,889 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,890 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,890 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,890 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,890 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,891 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,891 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,891 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,891 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,892 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,892 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,892 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,892 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,893 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,893 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,893 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,893 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,893 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,894 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,894 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,894 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,894 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,895 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,895 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:57,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 16:24:57,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:24:57,940 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:24:57,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:24:57,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:24:57,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:24:57,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:24:57,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:24:57,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:24:57,957 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-11 16:24:58,020 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-11 16:24:58,021 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-11 16:24:58,028 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-11 16:24:58,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 105 transitions, 218 flow [2020-10-11 16:24:58,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 100 transitions, 205 flow [2020-10-11 16:24:58,064 INFO L129 PetriNetUnfolder]: 9/67 cut-off events. [2020-10-11 16:24:58,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:24:58,064 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:58,066 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:58,069 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:24:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:58,079 INFO L82 PathProgramCache]: Analyzing trace with hash -889928077, now seen corresponding path program 1 times [2020-10-11 16:24:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:58,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975058683] [2020-10-11 16:24:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:24:58,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975058683] [2020-10-11 16:24:58,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:58,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:24:58,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392863974] [2020-10-11 16:24:58,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:24:58,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:58,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:24:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:24:58,331 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 105 [2020-10-11 16:24:58,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 205 flow. Second operand 2 states. [2020-10-11 16:24:58,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:58,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 105 [2020-10-11 16:24:58,335 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:58,407 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-10-11 16:24:58,408 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:24:58,409 INFO L80 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 110 events. 6/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 162 event pairs, 0 based on Foata normal form. 10/109 useless extension candidates. Maximal degree in co-relation 113. Up to 4 conditions per place. [2020-10-11 16:24:58,413 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 0 selfloop transitions, 0 changer transitions 0/92 dead transitions. [2020-10-11 16:24:58,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 189 flow [2020-10-11 16:24:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:24:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:24:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2020-10-11 16:24:58,430 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9619047619047619 [2020-10-11 16:24:58,431 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2020-10-11 16:24:58,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2020-10-11 16:24:58,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:58,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2020-10-11 16:24:58,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:24:58,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:24:58,451 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:24:58,453 INFO L185 Difference]: Start difference. First operand has 90 places, 100 transitions, 205 flow. Second operand 2 states and 202 transitions. [2020-10-11 16:24:58,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 189 flow [2020-10-11 16:24:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 189 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:24:58,465 INFO L241 Difference]: Finished difference. Result has 91 places, 92 transitions, 189 flow [2020-10-11 16:24:58,468 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=189, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2020-10-11 16:24:58,469 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2020-10-11 16:24:58,470 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 189 flow [2020-10-11 16:24:58,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:24:58,470 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:58,470 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:58,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 16:24:58,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:24:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1395486702, now seen corresponding path program 1 times [2020-10-11 16:24:58,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:58,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76797427] [2020-10-11 16:24:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:24:58,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76797427] [2020-10-11 16:24:58,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:58,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 16:24:58,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352519240] [2020-10-11 16:24:58,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 16:24:58,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 16:24:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 16:24:58,738 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 105 [2020-10-11 16:24:58,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 189 flow. Second operand 3 states. [2020-10-11 16:24:58,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:58,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 105 [2020-10-11 16:24:58,739 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:58,761 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2020-10-11 16:24:58,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:24:58,762 INFO L80 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 88 events. 4/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 3/87 useless extension candidates. Maximal degree in co-relation 101. Up to 8 conditions per place. [2020-10-11 16:24:58,763 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 5 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2020-10-11 16:24:58,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 189 flow [2020-10-11 16:24:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 16:24:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 16:24:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2020-10-11 16:24:58,767 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2020-10-11 16:24:58,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2020-10-11 16:24:58,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2020-10-11 16:24:58,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:58,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2020-10-11 16:24:58,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 16:24:58,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 16:24:58,773 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 16:24:58,773 INFO L185 Difference]: Start difference. First operand has 91 places, 92 transitions, 189 flow. Second operand 3 states and 262 transitions. [2020-10-11 16:24:58,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 189 flow [2020-10-11 16:24:58,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 189 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:24:58,778 INFO L241 Difference]: Finished difference. Result has 84 places, 82 transitions, 190 flow [2020-10-11 16:24:58,778 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2020-10-11 16:24:58,779 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2020-10-11 16:24:58,779 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 190 flow [2020-10-11 16:24:58,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 16:24:58,780 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:58,780 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:58,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 16:24:58,780 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:24:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1508915281, now seen corresponding path program 1 times [2020-10-11 16:24:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:58,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241030976] [2020-10-11 16:24:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:24:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241030976] [2020-10-11 16:24:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580237161] [2020-10-11 16:24:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:24:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 16:24:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:24:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:24:59,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:24:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 16:24:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17797187] [2020-10-11 16:24:59,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:24:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:24:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:24:59,511 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:24:59,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 190 flow. Second operand 7 states. [2020-10-11 16:24:59,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:59,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:24:59,513 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:59,609 INFO L129 PetriNetUnfolder]: 4/93 cut-off events. [2020-10-11 16:24:59,609 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-10-11 16:24:59,610 INFO L80 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 93 events. 4/93 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/90 useless extension candidates. Maximal degree in co-relation 123. Up to 10 conditions per place. [2020-10-11 16:24:59,611 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2020-10-11 16:24:59,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 232 flow [2020-10-11 16:24:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:24:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:24:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2020-10-11 16:24:59,620 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7984126984126985 [2020-10-11 16:24:59,620 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 503 transitions. [2020-10-11 16:24:59,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 503 transitions. [2020-10-11 16:24:59,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:59,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 503 transitions. [2020-10-11 16:24:59,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:24:59,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:24:59,628 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:24:59,628 INFO L185 Difference]: Start difference. First operand has 84 places, 82 transitions, 190 flow. Second operand 6 states and 503 transitions. [2020-10-11 16:24:59,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 232 flow [2020-10-11 16:24:59,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 16:24:59,637 INFO L241 Difference]: Finished difference. Result has 91 places, 85 transitions, 226 flow [2020-10-11 16:24:59,637 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2020-10-11 16:24:59,638 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2020-10-11 16:24:59,638 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 226 flow [2020-10-11 16:24:59,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:24:59,638 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:59,639 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:59,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-11 16:24:59,854 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:24:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash -781858254, now seen corresponding path program 2 times [2020-10-11 16:24:59,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:59,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668663334] [2020-10-11 16:24:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:24:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668663334] [2020-10-11 16:24:59,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839906351] [2020-10-11 16:24:59,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:00,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:00,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 16:25:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:00,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:00,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-11 16:25:00,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637944302] [2020-10-11 16:25:00,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:25:00,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:25:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:25:00,750 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:00,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 226 flow. Second operand 9 states. [2020-10-11 16:25:00,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:00,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:00,751 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:00,838 INFO L129 PetriNetUnfolder]: 4/98 cut-off events. [2020-10-11 16:25:00,838 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2020-10-11 16:25:00,839 INFO L80 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 98 events. 4/98 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 150. Up to 10 conditions per place. [2020-10-11 16:25:00,840 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2020-10-11 16:25:00,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 89 transitions, 282 flow [2020-10-11 16:25:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 16:25:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 16:25:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 749 transitions. [2020-10-11 16:25:00,843 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7925925925925926 [2020-10-11 16:25:00,844 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 749 transitions. [2020-10-11 16:25:00,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 749 transitions. [2020-10-11 16:25:00,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:00,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 749 transitions. [2020-10-11 16:25:00,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 16:25:00,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 16:25:00,849 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 16:25:00,849 INFO L185 Difference]: Start difference. First operand has 91 places, 85 transitions, 226 flow. Second operand 9 states and 749 transitions. [2020-10-11 16:25:00,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 89 transitions, 282 flow [2020-10-11 16:25:00,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 270 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-11 16:25:00,853 INFO L241 Difference]: Finished difference. Result has 100 places, 88 transitions, 264 flow [2020-10-11 16:25:00,854 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2020-10-11 16:25:00,854 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2020-10-11 16:25:00,854 INFO L481 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 264 flow [2020-10-11 16:25:00,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:25:00,854 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:00,854 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:01,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:01,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1794383473, now seen corresponding path program 3 times [2020-10-11 16:25:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:01,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101391054] [2020-10-11 16:25:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:01,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101391054] [2020-10-11 16:25:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146135693] [2020-10-11 16:25:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:01,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 16:25:01,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 16:25:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:01,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:01,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 16:25:01,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814522126] [2020-10-11 16:25:01,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:25:01,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:25:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:25:02,187 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:02,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 88 transitions, 264 flow. Second operand 11 states. [2020-10-11 16:25:02,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:02,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:02,190 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:02,322 INFO L129 PetriNetUnfolder]: 4/103 cut-off events. [2020-10-11 16:25:02,322 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2020-10-11 16:25:02,323 INFO L80 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 103 events. 4/103 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 178. Up to 10 conditions per place. [2020-10-11 16:25:02,323 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2020-10-11 16:25:02,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 92 transitions, 334 flow [2020-10-11 16:25:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:25:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:25:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 995 transitions. [2020-10-11 16:25:02,332 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7896825396825397 [2020-10-11 16:25:02,332 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 995 transitions. [2020-10-11 16:25:02,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 995 transitions. [2020-10-11 16:25:02,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:02,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 995 transitions. [2020-10-11 16:25:02,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:25:02,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:25:02,343 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:25:02,343 INFO L185 Difference]: Start difference. First operand has 100 places, 88 transitions, 264 flow. Second operand 12 states and 995 transitions. [2020-10-11 16:25:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 92 transitions, 334 flow [2020-10-11 16:25:02,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 92 transitions, 310 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-11 16:25:02,349 INFO L241 Difference]: Finished difference. Result has 109 places, 91 transitions, 302 flow [2020-10-11 16:25:02,349 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=302, PETRI_PLACES=109, PETRI_TRANSITIONS=91} [2020-10-11 16:25:02,349 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2020-10-11 16:25:02,350 INFO L481 AbstractCegarLoop]: Abstraction has has 109 places, 91 transitions, 302 flow [2020-10-11 16:25:02,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:25:02,350 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:02,350 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:02,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:02,564 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 122608722, now seen corresponding path program 4 times [2020-10-11 16:25:02,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:02,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24240796] [2020-10-11 16:25:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:02,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24240796] [2020-10-11 16:25:02,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542456847] [2020-10-11 16:25:02,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:02,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:02,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:02,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 16:25:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:02,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:02,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-11 16:25:02,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018037935] [2020-10-11 16:25:02,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:25:02,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:25:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:25:03,957 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:03,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 91 transitions, 302 flow. Second operand 13 states. [2020-10-11 16:25:03,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:03,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:03,959 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:04,133 INFO L129 PetriNetUnfolder]: 4/108 cut-off events. [2020-10-11 16:25:04,133 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2020-10-11 16:25:04,134 INFO L80 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 108 events. 4/108 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 206. Up to 10 conditions per place. [2020-10-11 16:25:04,134 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2020-10-11 16:25:04,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 95 transitions, 386 flow [2020-10-11 16:25:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:25:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:25:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1241 transitions. [2020-10-11 16:25:04,139 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7879365079365079 [2020-10-11 16:25:04,139 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1241 transitions. [2020-10-11 16:25:04,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1241 transitions. [2020-10-11 16:25:04,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:04,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1241 transitions. [2020-10-11 16:25:04,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:25:04,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:25:04,146 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:25:04,146 INFO L185 Difference]: Start difference. First operand has 109 places, 91 transitions, 302 flow. Second operand 15 states and 1241 transitions. [2020-10-11 16:25:04,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 95 transitions, 386 flow [2020-10-11 16:25:04,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 95 transitions, 350 flow, removed 7 selfloop flow, removed 8 redundant places. [2020-10-11 16:25:04,150 INFO L241 Difference]: Finished difference. Result has 118 places, 94 transitions, 340 flow [2020-10-11 16:25:04,151 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=340, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2020-10-11 16:25:04,151 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2020-10-11 16:25:04,151 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 340 flow [2020-10-11 16:25:04,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:25:04,151 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:04,151 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:04,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:04,367 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1768348817, now seen corresponding path program 5 times [2020-10-11 16:25:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:04,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747469319] [2020-10-11 16:25:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747469319] [2020-10-11 16:25:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71954064] [2020-10-11 16:25:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:04,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 16:25:04,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:04,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:04,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:04,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:25:04,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601885477] [2020-10-11 16:25:04,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:25:04,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:25:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:25:06,431 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:06,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 340 flow. Second operand 15 states. [2020-10-11 16:25:06,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:06,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:06,432 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:06,591 INFO L129 PetriNetUnfolder]: 4/113 cut-off events. [2020-10-11 16:25:06,592 INFO L130 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2020-10-11 16:25:06,592 INFO L80 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 113 events. 4/113 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 234. Up to 10 conditions per place. [2020-10-11 16:25:06,593 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 20 changer transitions 0/98 dead transitions. [2020-10-11 16:25:06,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 98 transitions, 438 flow [2020-10-11 16:25:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:25:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:25:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1487 transitions. [2020-10-11 16:25:06,606 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7867724867724868 [2020-10-11 16:25:06,606 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1487 transitions. [2020-10-11 16:25:06,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1487 transitions. [2020-10-11 16:25:06,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:06,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1487 transitions. [2020-10-11 16:25:06,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:25:06,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:25:06,614 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:25:06,614 INFO L185 Difference]: Start difference. First operand has 118 places, 94 transitions, 340 flow. Second operand 18 states and 1487 transitions. [2020-10-11 16:25:06,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 98 transitions, 438 flow [2020-10-11 16:25:06,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 98 transitions, 390 flow, removed 10 selfloop flow, removed 11 redundant places. [2020-10-11 16:25:06,622 INFO L241 Difference]: Finished difference. Result has 127 places, 97 transitions, 378 flow [2020-10-11 16:25:06,623 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=378, PETRI_PLACES=127, PETRI_TRANSITIONS=97} [2020-10-11 16:25:06,624 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 37 predicate places. [2020-10-11 16:25:06,624 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 97 transitions, 378 flow [2020-10-11 16:25:06,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:25:06,625 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:06,626 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:06,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-11 16:25:06,840 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1595917938, now seen corresponding path program 6 times [2020-10-11 16:25:06,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:06,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136357835] [2020-10-11 16:25:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:06,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136357835] [2020-10-11 16:25:06,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687880306] [2020-10-11 16:25:06,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:07,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 16:25:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:25:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:07,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:07,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-11 16:25:07,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466555878] [2020-10-11 16:25:07,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:25:07,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:07,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:25:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:25:09,214 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:09,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 97 transitions, 378 flow. Second operand 17 states. [2020-10-11 16:25:09,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:09,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:09,216 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:09,431 INFO L129 PetriNetUnfolder]: 4/118 cut-off events. [2020-10-11 16:25:09,431 INFO L130 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2020-10-11 16:25:09,432 INFO L80 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 118 events. 4/118 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 262. Up to 10 conditions per place. [2020-10-11 16:25:09,432 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2020-10-11 16:25:09,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 101 transitions, 490 flow [2020-10-11 16:25:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:25:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:25:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1733 transitions. [2020-10-11 16:25:09,438 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7859410430839002 [2020-10-11 16:25:09,438 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1733 transitions. [2020-10-11 16:25:09,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1733 transitions. [2020-10-11 16:25:09,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:09,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1733 transitions. [2020-10-11 16:25:09,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:25:09,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:25:09,447 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:25:09,447 INFO L185 Difference]: Start difference. First operand has 127 places, 97 transitions, 378 flow. Second operand 21 states and 1733 transitions. [2020-10-11 16:25:09,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 101 transitions, 490 flow [2020-10-11 16:25:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 101 transitions, 430 flow, removed 13 selfloop flow, removed 14 redundant places. [2020-10-11 16:25:09,452 INFO L241 Difference]: Finished difference. Result has 136 places, 100 transitions, 416 flow [2020-10-11 16:25:09,453 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=416, PETRI_PLACES=136, PETRI_TRANSITIONS=100} [2020-10-11 16:25:09,453 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 46 predicate places. [2020-10-11 16:25:09,453 INFO L481 AbstractCegarLoop]: Abstraction has has 136 places, 100 transitions, 416 flow [2020-10-11 16:25:09,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:25:09,453 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:09,454 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:09,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:09,667 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash 627412303, now seen corresponding path program 7 times [2020-10-11 16:25:09,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:09,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242554203] [2020-10-11 16:25:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:09,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242554203] [2020-10-11 16:25:09,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000168721] [2020-10-11 16:25:09,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:25:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:09,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:09,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-11 16:25:09,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502495581] [2020-10-11 16:25:09,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:25:09,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:09,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:25:09,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:25:12,064 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:12,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 100 transitions, 416 flow. Second operand 19 states. [2020-10-11 16:25:12,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:12,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:12,065 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:12,336 INFO L129 PetriNetUnfolder]: 4/123 cut-off events. [2020-10-11 16:25:12,336 INFO L130 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2020-10-11 16:25:12,337 INFO L80 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 123 events. 4/123 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 290. Up to 10 conditions per place. [2020-10-11 16:25:12,338 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 26 changer transitions 0/104 dead transitions. [2020-10-11 16:25:12,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 104 transitions, 542 flow [2020-10-11 16:25:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 16:25:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-11 16:25:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1979 transitions. [2020-10-11 16:25:12,347 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7853174603174603 [2020-10-11 16:25:12,347 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1979 transitions. [2020-10-11 16:25:12,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1979 transitions. [2020-10-11 16:25:12,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:12,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1979 transitions. [2020-10-11 16:25:12,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-11 16:25:12,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-11 16:25:12,359 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-11 16:25:12,359 INFO L185 Difference]: Start difference. First operand has 136 places, 100 transitions, 416 flow. Second operand 24 states and 1979 transitions. [2020-10-11 16:25:12,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 104 transitions, 542 flow [2020-10-11 16:25:12,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 104 transitions, 470 flow, removed 16 selfloop flow, removed 17 redundant places. [2020-10-11 16:25:12,364 INFO L241 Difference]: Finished difference. Result has 145 places, 103 transitions, 454 flow [2020-10-11 16:25:12,364 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=454, PETRI_PLACES=145, PETRI_TRANSITIONS=103} [2020-10-11 16:25:12,365 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 55 predicate places. [2020-10-11 16:25:12,365 INFO L481 AbstractCegarLoop]: Abstraction has has 145 places, 103 transitions, 454 flow [2020-10-11 16:25:12,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:25:12,365 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:12,365 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:12,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:12,579 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash -622163822, now seen corresponding path program 8 times [2020-10-11 16:25:12,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:12,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400056134] [2020-10-11 16:25:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:12,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400056134] [2020-10-11 16:25:12,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120514123] [2020-10-11 16:25:12,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:12,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:12,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:12,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:25:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:12,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:12,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-11 16:25:12,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802397167] [2020-10-11 16:25:12,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:25:12,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:12,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:25:12,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:25:15,739 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:15,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 103 transitions, 454 flow. Second operand 21 states. [2020-10-11 16:25:15,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:15,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:15,741 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:16,051 INFO L129 PetriNetUnfolder]: 4/128 cut-off events. [2020-10-11 16:25:16,051 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2020-10-11 16:25:16,051 INFO L80 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 128 events. 4/128 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 318. Up to 10 conditions per place. [2020-10-11 16:25:16,052 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 29 changer transitions 0/107 dead transitions. [2020-10-11 16:25:16,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 107 transitions, 594 flow [2020-10-11 16:25:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 16:25:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-11 16:25:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2225 transitions. [2020-10-11 16:25:16,058 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7848324514991182 [2020-10-11 16:25:16,058 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2225 transitions. [2020-10-11 16:25:16,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2225 transitions. [2020-10-11 16:25:16,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:16,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2225 transitions. [2020-10-11 16:25:16,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-11 16:25:16,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-11 16:25:16,066 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-11 16:25:16,066 INFO L185 Difference]: Start difference. First operand has 145 places, 103 transitions, 454 flow. Second operand 27 states and 2225 transitions. [2020-10-11 16:25:16,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 107 transitions, 594 flow [2020-10-11 16:25:16,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 107 transitions, 510 flow, removed 19 selfloop flow, removed 20 redundant places. [2020-10-11 16:25:16,071 INFO L241 Difference]: Finished difference. Result has 154 places, 106 transitions, 492 flow [2020-10-11 16:25:16,072 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=492, PETRI_PLACES=154, PETRI_TRANSITIONS=106} [2020-10-11 16:25:16,072 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 64 predicate places. [2020-10-11 16:25:16,072 INFO L481 AbstractCegarLoop]: Abstraction has has 154 places, 106 transitions, 492 flow [2020-10-11 16:25:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:25:16,072 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:16,073 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:16,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 16:25:16,288 INFO L429 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1163976913, now seen corresponding path program 9 times [2020-10-11 16:25:16,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:16,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544013603] [2020-10-11 16:25:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:16,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544013603] [2020-10-11 16:25:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853853058] [2020-10-11 16:25:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:16,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 16:25:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:25:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:16,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:16,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:25:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145953174] [2020-10-11 16:25:16,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:25:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:25:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:25:19,756 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:19,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 106 transitions, 492 flow. Second operand 23 states. [2020-10-11 16:25:19,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:19,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:19,758 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:20,140 INFO L129 PetriNetUnfolder]: 4/133 cut-off events. [2020-10-11 16:25:20,141 INFO L130 PetriNetUnfolder]: For 449/449 co-relation queries the response was YES. [2020-10-11 16:25:20,141 INFO L80 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 133 events. 4/133 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 346. Up to 11 conditions per place. [2020-10-11 16:25:20,142 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 32 changer transitions 0/110 dead transitions. [2020-10-11 16:25:20,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 110 transitions, 646 flow [2020-10-11 16:25:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:25:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:25:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2471 transitions. [2020-10-11 16:25:20,146 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7844444444444445 [2020-10-11 16:25:20,146 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2471 transitions. [2020-10-11 16:25:20,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2471 transitions. [2020-10-11 16:25:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:20,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2471 transitions. [2020-10-11 16:25:20,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:25:20,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:25:20,154 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:25:20,154 INFO L185 Difference]: Start difference. First operand has 154 places, 106 transitions, 492 flow. Second operand 30 states and 2471 transitions. [2020-10-11 16:25:20,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 110 transitions, 646 flow [2020-10-11 16:25:20,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 110 transitions, 550 flow, removed 22 selfloop flow, removed 23 redundant places. [2020-10-11 16:25:20,160 INFO L241 Difference]: Finished difference. Result has 163 places, 109 transitions, 530 flow [2020-10-11 16:25:20,160 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=530, PETRI_PLACES=163, PETRI_TRANSITIONS=109} [2020-10-11 16:25:20,161 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 73 predicate places. [2020-10-11 16:25:20,161 INFO L481 AbstractCegarLoop]: Abstraction has has 163 places, 109 transitions, 530 flow [2020-10-11 16:25:20,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:25:20,161 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:20,161 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:20,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:20,375 INFO L429 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:20,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1908333902, now seen corresponding path program 10 times [2020-10-11 16:25:20,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:20,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857142760] [2020-10-11 16:25:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857142760] [2020-10-11 16:25:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290649059] [2020-10-11 16:25:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:20,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:20,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:25:20,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:20,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:20,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-10-11 16:25:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54495929] [2020-10-11 16:25:20,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 16:25:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 16:25:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-11 16:25:25,155 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:25,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 109 transitions, 530 flow. Second operand 25 states. [2020-10-11 16:25:25,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:25,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:25,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:25,561 INFO L129 PetriNetUnfolder]: 4/138 cut-off events. [2020-10-11 16:25:25,561 INFO L130 PetriNetUnfolder]: For 558/558 co-relation queries the response was YES. [2020-10-11 16:25:25,561 INFO L80 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 138 events. 4/138 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 374. Up to 12 conditions per place. [2020-10-11 16:25:25,562 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 35 changer transitions 0/113 dead transitions. [2020-10-11 16:25:25,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 113 transitions, 698 flow [2020-10-11 16:25:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:25:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:25:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2717 transitions. [2020-10-11 16:25:25,572 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7841269841269841 [2020-10-11 16:25:25,572 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2717 transitions. [2020-10-11 16:25:25,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2717 transitions. [2020-10-11 16:25:25,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:25,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2717 transitions. [2020-10-11 16:25:25,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:25:25,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:25:25,581 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:25:25,581 INFO L185 Difference]: Start difference. First operand has 163 places, 109 transitions, 530 flow. Second operand 33 states and 2717 transitions. [2020-10-11 16:25:25,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 113 transitions, 698 flow [2020-10-11 16:25:25,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 113 transitions, 590 flow, removed 25 selfloop flow, removed 26 redundant places. [2020-10-11 16:25:25,588 INFO L241 Difference]: Finished difference. Result has 172 places, 112 transitions, 568 flow [2020-10-11 16:25:25,589 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=568, PETRI_PLACES=172, PETRI_TRANSITIONS=112} [2020-10-11 16:25:25,589 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 82 predicate places. [2020-10-11 16:25:25,589 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 112 transitions, 568 flow [2020-10-11 16:25:25,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 16:25:25,589 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:25,590 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:25,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:25,804 INFO L429 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1376528113, now seen corresponding path program 11 times [2020-10-11 16:25:25,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:25,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096789247] [2020-10-11 16:25:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:26,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096789247] [2020-10-11 16:25:26,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780205381] [2020-10-11 16:25:26,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:26,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 16:25:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:26,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 16:25:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:26,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:26,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-10-11 16:25:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001322239] [2020-10-11 16:25:26,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 16:25:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 16:25:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-10-11 16:25:30,582 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2020-10-11 16:25:30,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 112 transitions, 568 flow. Second operand 27 states. [2020-10-11 16:25:30,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:30,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2020-10-11 16:25:30,584 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:31,058 INFO L129 PetriNetUnfolder]: 4/143 cut-off events. [2020-10-11 16:25:31,058 INFO L130 PetriNetUnfolder]: For 679/679 co-relation queries the response was YES. [2020-10-11 16:25:31,059 INFO L80 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 143 events. 4/143 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 402. Up to 13 conditions per place. [2020-10-11 16:25:31,060 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 8 selfloop transitions, 38 changer transitions 0/116 dead transitions. [2020-10-11 16:25:31,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 116 transitions, 750 flow [2020-10-11 16:25:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 16:25:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-11 16:25:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2963 transitions. [2020-10-11 16:25:31,065 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7838624338624338 [2020-10-11 16:25:31,065 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2963 transitions. [2020-10-11 16:25:31,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2963 transitions. [2020-10-11 16:25:31,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:31,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2963 transitions. [2020-10-11 16:25:31,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-11 16:25:31,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-11 16:25:31,075 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-11 16:25:31,075 INFO L185 Difference]: Start difference. First operand has 172 places, 112 transitions, 568 flow. Second operand 36 states and 2963 transitions. [2020-10-11 16:25:31,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 116 transitions, 750 flow [2020-10-11 16:25:31,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 116 transitions, 630 flow, removed 28 selfloop flow, removed 29 redundant places. [2020-10-11 16:25:31,085 INFO L241 Difference]: Finished difference. Result has 181 places, 115 transitions, 606 flow [2020-10-11 16:25:31,086 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=606, PETRI_PLACES=181, PETRI_TRANSITIONS=115} [2020-10-11 16:25:31,086 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 91 predicate places. [2020-10-11 16:25:31,086 INFO L481 AbstractCegarLoop]: Abstraction has has 181 places, 115 transitions, 606 flow [2020-10-11 16:25:31,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 16:25:31,086 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:31,087 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:31,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 16:25:31,301 INFO L429 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1103784750, now seen corresponding path program 12 times [2020-10-11 16:25:31,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:31,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609640424] [2020-10-11 16:25:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609640424] [2020-10-11 16:25:31,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897857071] [2020-10-11 16:25:31,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:31,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 16:25:31,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 16:25:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:31,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:31,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-10-11 16:25:31,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455286755] [2020-10-11 16:25:31,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 16:25:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 16:25:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-10-11 16:25:36,594 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:25:36,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 115 transitions, 606 flow. Second operand 29 states. [2020-10-11 16:25:36,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:36,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:25:36,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:37,257 INFO L129 PetriNetUnfolder]: 4/148 cut-off events. [2020-10-11 16:25:37,257 INFO L130 PetriNetUnfolder]: For 812/812 co-relation queries the response was YES. [2020-10-11 16:25:37,258 INFO L80 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 148 events. 4/148 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 433. Up to 14 conditions per place. [2020-10-11 16:25:37,259 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 42 changer transitions 0/120 dead transitions. [2020-10-11 16:25:37,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 120 transitions, 810 flow [2020-10-11 16:25:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 16:25:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-11 16:25:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3134 transitions. [2020-10-11 16:25:37,274 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7653235653235653 [2020-10-11 16:25:37,274 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3134 transitions. [2020-10-11 16:25:37,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3134 transitions. [2020-10-11 16:25:37,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:37,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3134 transitions. [2020-10-11 16:25:37,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-11 16:25:37,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-11 16:25:37,293 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-11 16:25:37,293 INFO L185 Difference]: Start difference. First operand has 181 places, 115 transitions, 606 flow. Second operand 39 states and 3134 transitions. [2020-10-11 16:25:37,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 120 transitions, 810 flow [2020-10-11 16:25:37,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 120 transitions, 678 flow, removed 31 selfloop flow, removed 32 redundant places. [2020-10-11 16:25:37,303 INFO L241 Difference]: Finished difference. Result has 191 places, 119 transitions, 657 flow [2020-10-11 16:25:37,303 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=657, PETRI_PLACES=191, PETRI_TRANSITIONS=119} [2020-10-11 16:25:37,303 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 101 predicate places. [2020-10-11 16:25:37,303 INFO L481 AbstractCegarLoop]: Abstraction has has 191 places, 119 transitions, 657 flow [2020-10-11 16:25:37,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 16:25:37,304 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:37,304 INFO L255 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:37,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 16:25:37,519 INFO L429 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:37,519 INFO L82 PathProgramCache]: Analyzing trace with hash 361872111, now seen corresponding path program 13 times [2020-10-11 16:25:37,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:37,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056312959] [2020-10-11 16:25:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:37,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056312959] [2020-10-11 16:25:37,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007514320] [2020-10-11 16:25:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:37,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 16:25:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:38,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:38,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-10-11 16:25:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728703672] [2020-10-11 16:25:38,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 16:25:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 16:25:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-11 16:25:43,420 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:25:43,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 119 transitions, 657 flow. Second operand 31 states. [2020-10-11 16:25:43,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:43,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:25:43,422 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:44,020 INFO L129 PetriNetUnfolder]: 4/153 cut-off events. [2020-10-11 16:25:44,021 INFO L130 PetriNetUnfolder]: For 976/976 co-relation queries the response was YES. [2020-10-11 16:25:44,021 INFO L80 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 153 events. 4/153 cut-off events. For 976/976 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/150 useless extension candidates. Maximal degree in co-relation 467. Up to 15 conditions per place. [2020-10-11 16:25:44,022 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2020-10-11 16:25:44,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 123 transitions, 873 flow [2020-10-11 16:25:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 16:25:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 16:25:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3374 transitions. [2020-10-11 16:25:44,027 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.765079365079365 [2020-10-11 16:25:44,027 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3374 transitions. [2020-10-11 16:25:44,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3374 transitions. [2020-10-11 16:25:44,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:44,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3374 transitions. [2020-10-11 16:25:44,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-11 16:25:44,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-11 16:25:44,036 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-11 16:25:44,036 INFO L185 Difference]: Start difference. First operand has 191 places, 119 transitions, 657 flow. Second operand 42 states and 3374 transitions. [2020-10-11 16:25:44,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 123 transitions, 873 flow [2020-10-11 16:25:44,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 123 transitions, 734 flow, removed 34 selfloop flow, removed 34 redundant places. [2020-10-11 16:25:44,046 INFO L241 Difference]: Finished difference. Result has 201 places, 122 transitions, 703 flow [2020-10-11 16:25:44,047 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=703, PETRI_PLACES=201, PETRI_TRANSITIONS=122} [2020-10-11 16:25:44,047 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 111 predicate places. [2020-10-11 16:25:44,047 INFO L481 AbstractCegarLoop]: Abstraction has has 201 places, 122 transitions, 703 flow [2020-10-11 16:25:44,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 16:25:44,047 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:44,048 INFO L255 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:44,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 16:25:44,261 INFO L429 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 22666994, now seen corresponding path program 14 times [2020-10-11 16:25:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:44,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171862458] [2020-10-11 16:25:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171862458] [2020-10-11 16:25:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311042230] [2020-10-11 16:25:44,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:44,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:44,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 16:25:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:44,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:44,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-10-11 16:25:44,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284394365] [2020-10-11 16:25:44,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-11 16:25:44,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-11 16:25:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 16:25:50,815 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:25:50,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 122 transitions, 703 flow. Second operand 33 states. [2020-10-11 16:25:50,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:50,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:25:50,818 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:51,554 INFO L129 PetriNetUnfolder]: 4/158 cut-off events. [2020-10-11 16:25:51,554 INFO L130 PetriNetUnfolder]: For 1137/1137 co-relation queries the response was YES. [2020-10-11 16:25:51,555 INFO L80 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 158 events. 4/158 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/155 useless extension candidates. Maximal degree in co-relation 498. Up to 16 conditions per place. [2020-10-11 16:25:51,556 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 48 changer transitions 0/126 dead transitions. [2020-10-11 16:25:51,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 126 transitions, 933 flow [2020-10-11 16:25:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 16:25:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 16:25:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3614 transitions. [2020-10-11 16:25:51,560 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7648677248677249 [2020-10-11 16:25:51,560 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3614 transitions. [2020-10-11 16:25:51,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3614 transitions. [2020-10-11 16:25:51,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:51,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3614 transitions. [2020-10-11 16:25:51,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-11 16:25:51,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-11 16:25:51,570 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-11 16:25:51,570 INFO L185 Difference]: Start difference. First operand has 201 places, 122 transitions, 703 flow. Second operand 45 states and 3614 transitions. [2020-10-11 16:25:51,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 126 transitions, 933 flow [2020-10-11 16:25:51,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 126 transitions, 775 flow, removed 37 selfloop flow, removed 38 redundant places. [2020-10-11 16:25:51,580 INFO L241 Difference]: Finished difference. Result has 210 places, 125 transitions, 741 flow [2020-10-11 16:25:51,581 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=741, PETRI_PLACES=210, PETRI_TRANSITIONS=125} [2020-10-11 16:25:51,581 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 120 predicate places. [2020-10-11 16:25:51,581 INFO L481 AbstractCegarLoop]: Abstraction has has 210 places, 125 transitions, 741 flow [2020-10-11 16:25:51,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-11 16:25:51,581 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:51,582 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:51,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:51,796 INFO L429 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:25:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:51,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1507408689, now seen corresponding path program 15 times [2020-10-11 16:25:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:51,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404974830] [2020-10-11 16:25:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:52,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404974830] [2020-10-11 16:25:52,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386742765] [2020-10-11 16:25:52,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:52,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-11 16:25:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-11 16:25:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:25:52,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:52,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-10-11 16:25:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579329021] [2020-10-11 16:25:52,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-11 16:25:52,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-11 16:25:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 16:25:59,497 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:25:59,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 125 transitions, 741 flow. Second operand 35 states. [2020-10-11 16:25:59,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:59,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:25:59,500 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:00,312 INFO L129 PetriNetUnfolder]: 4/163 cut-off events. [2020-10-11 16:26:00,312 INFO L130 PetriNetUnfolder]: For 1305/1305 co-relation queries the response was YES. [2020-10-11 16:26:00,313 INFO L80 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 163 events. 4/163 cut-off events. For 1305/1305 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 526. Up to 17 conditions per place. [2020-10-11 16:26:00,314 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 51 changer transitions 0/129 dead transitions. [2020-10-11 16:26:00,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 129 transitions, 985 flow [2020-10-11 16:26:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 16:26:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 16:26:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3854 transitions. [2020-10-11 16:26:00,317 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7646825396825396 [2020-10-11 16:26:00,318 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3854 transitions. [2020-10-11 16:26:00,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3854 transitions. [2020-10-11 16:26:00,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:00,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3854 transitions. [2020-10-11 16:26:00,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-11 16:26:00,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-11 16:26:00,328 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-11 16:26:00,328 INFO L185 Difference]: Start difference. First operand has 210 places, 125 transitions, 741 flow. Second operand 48 states and 3854 transitions. [2020-10-11 16:26:00,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 129 transitions, 985 flow [2020-10-11 16:26:00,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 129 transitions, 815 flow, removed 40 selfloop flow, removed 41 redundant places. [2020-10-11 16:26:00,338 INFO L241 Difference]: Finished difference. Result has 219 places, 128 transitions, 779 flow [2020-10-11 16:26:00,338 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=779, PETRI_PLACES=219, PETRI_TRANSITIONS=128} [2020-10-11 16:26:00,338 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 129 predicate places. [2020-10-11 16:26:00,339 INFO L481 AbstractCegarLoop]: Abstraction has has 219 places, 128 transitions, 779 flow [2020-10-11 16:26:00,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-11 16:26:00,339 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:00,339 INFO L255 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:00,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 16:26:00,554 INFO L429 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:26:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1606418706, now seen corresponding path program 16 times [2020-10-11 16:26:00,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:00,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928784829] [2020-10-11 16:26:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:01,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928784829] [2020-10-11 16:26:01,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352122135] [2020-10-11 16:26:01,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:01,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:26:01,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-11 16:26:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:01,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:01,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-10-11 16:26:01,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150012630] [2020-10-11 16:26:01,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-11 16:26:01,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-11 16:26:01,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 16:26:09,327 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:26:09,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 128 transitions, 779 flow. Second operand 37 states. [2020-10-11 16:26:09,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:09,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:26:09,330 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:10,226 INFO L129 PetriNetUnfolder]: 4/168 cut-off events. [2020-10-11 16:26:10,226 INFO L130 PetriNetUnfolder]: For 1486/1486 co-relation queries the response was YES. [2020-10-11 16:26:10,227 INFO L80 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 168 events. 4/168 cut-off events. For 1486/1486 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/165 useless extension candidates. Maximal degree in co-relation 554. Up to 18 conditions per place. [2020-10-11 16:26:10,228 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 54 changer transitions 0/132 dead transitions. [2020-10-11 16:26:10,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 132 transitions, 1037 flow [2020-10-11 16:26:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 16:26:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 16:26:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4094 transitions. [2020-10-11 16:26:10,233 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7645191409897292 [2020-10-11 16:26:10,233 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4094 transitions. [2020-10-11 16:26:10,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4094 transitions. [2020-10-11 16:26:10,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:10,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4094 transitions. [2020-10-11 16:26:10,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-11 16:26:10,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-11 16:26:10,244 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-11 16:26:10,244 INFO L185 Difference]: Start difference. First operand has 219 places, 128 transitions, 779 flow. Second operand 51 states and 4094 transitions. [2020-10-11 16:26:10,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 132 transitions, 1037 flow [2020-10-11 16:26:10,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 132 transitions, 855 flow, removed 43 selfloop flow, removed 44 redundant places. [2020-10-11 16:26:10,256 INFO L241 Difference]: Finished difference. Result has 228 places, 131 transitions, 817 flow [2020-10-11 16:26:10,257 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=817, PETRI_PLACES=228, PETRI_TRANSITIONS=131} [2020-10-11 16:26:10,257 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 138 predicate places. [2020-10-11 16:26:10,257 INFO L481 AbstractCegarLoop]: Abstraction has has 228 places, 131 transitions, 817 flow [2020-10-11 16:26:10,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-11 16:26:10,257 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:10,257 INFO L255 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:10,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 16:26:10,471 INFO L429 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:26:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:10,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1830750545, now seen corresponding path program 17 times [2020-10-11 16:26:10,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:10,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907609110] [2020-10-11 16:26:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:11,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907609110] [2020-10-11 16:26:11,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682978303] [2020-10-11 16:26:11,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:11,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-11 16:26:11,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:11,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-11 16:26:11,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:11,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:11,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-10-11 16:26:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14475551] [2020-10-11 16:26:11,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-11 16:26:11,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-11 16:26:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 16:26:19,824 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:26:19,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 131 transitions, 817 flow. Second operand 39 states. [2020-10-11 16:26:19,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:19,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:26:19,826 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:20,847 INFO L129 PetriNetUnfolder]: 4/173 cut-off events. [2020-10-11 16:26:20,847 INFO L130 PetriNetUnfolder]: For 1679/1679 co-relation queries the response was YES. [2020-10-11 16:26:20,848 INFO L80 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 173 events. 4/173 cut-off events. For 1679/1679 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/170 useless extension candidates. Maximal degree in co-relation 582. Up to 19 conditions per place. [2020-10-11 16:26:20,849 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 57 changer transitions 0/135 dead transitions. [2020-10-11 16:26:20,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 135 transitions, 1089 flow [2020-10-11 16:26:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-11 16:26:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 16:26:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4334 transitions. [2020-10-11 16:26:20,854 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7643738977072311 [2020-10-11 16:26:20,855 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4334 transitions. [2020-10-11 16:26:20,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4334 transitions. [2020-10-11 16:26:20,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:20,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4334 transitions. [2020-10-11 16:26:20,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 55 states. [2020-10-11 16:26:20,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 55 states. [2020-10-11 16:26:20,868 INFO L81 ComplementDD]: Finished complementDD. Result 55 states. [2020-10-11 16:26:20,868 INFO L185 Difference]: Start difference. First operand has 228 places, 131 transitions, 817 flow. Second operand 54 states and 4334 transitions. [2020-10-11 16:26:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 135 transitions, 1089 flow [2020-10-11 16:26:20,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 135 transitions, 895 flow, removed 46 selfloop flow, removed 47 redundant places. [2020-10-11 16:26:20,882 INFO L241 Difference]: Finished difference. Result has 237 places, 134 transitions, 855 flow [2020-10-11 16:26:20,882 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=855, PETRI_PLACES=237, PETRI_TRANSITIONS=134} [2020-10-11 16:26:20,883 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 147 predicate places. [2020-10-11 16:26:20,883 INFO L481 AbstractCegarLoop]: Abstraction has has 237 places, 134 transitions, 855 flow [2020-10-11 16:26:20,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-11 16:26:20,883 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:20,883 INFO L255 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:21,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:21,096 INFO L429 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:26:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1928985394, now seen corresponding path program 18 times [2020-10-11 16:26:21,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:21,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331155410] [2020-10-11 16:26:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331155410] [2020-10-11 16:26:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365192816] [2020-10-11 16:26:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:22,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-11 16:26:22,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-11 16:26:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:22,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:22,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-10-11 16:26:22,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902916656] [2020-10-11 16:26:22,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-11 16:26:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:22,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-11 16:26:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 16:26:32,208 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:26:32,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 134 transitions, 855 flow. Second operand 41 states. [2020-10-11 16:26:32,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:32,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:26:32,210 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:33,472 INFO L129 PetriNetUnfolder]: 4/178 cut-off events. [2020-10-11 16:26:33,472 INFO L130 PetriNetUnfolder]: For 1884/1884 co-relation queries the response was YES. [2020-10-11 16:26:33,473 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 178 events. 4/178 cut-off events. For 1884/1884 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 610. Up to 20 conditions per place. [2020-10-11 16:26:33,474 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 60 changer transitions 0/138 dead transitions. [2020-10-11 16:26:33,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 138 transitions, 1141 flow [2020-10-11 16:26:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-11 16:26:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 16:26:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4574 transitions. [2020-10-11 16:26:33,478 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7642439431913116 [2020-10-11 16:26:33,478 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4574 transitions. [2020-10-11 16:26:33,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4574 transitions. [2020-10-11 16:26:33,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:33,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4574 transitions. [2020-10-11 16:26:33,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 58 states. [2020-10-11 16:26:33,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 58 states. [2020-10-11 16:26:33,490 INFO L81 ComplementDD]: Finished complementDD. Result 58 states. [2020-10-11 16:26:33,490 INFO L185 Difference]: Start difference. First operand has 237 places, 134 transitions, 855 flow. Second operand 57 states and 4574 transitions. [2020-10-11 16:26:33,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 138 transitions, 1141 flow [2020-10-11 16:26:33,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 138 transitions, 935 flow, removed 49 selfloop flow, removed 50 redundant places. [2020-10-11 16:26:33,504 INFO L241 Difference]: Finished difference. Result has 246 places, 137 transitions, 893 flow [2020-10-11 16:26:33,505 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=893, PETRI_PLACES=246, PETRI_TRANSITIONS=137} [2020-10-11 16:26:33,505 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 156 predicate places. [2020-10-11 16:26:33,505 INFO L481 AbstractCegarLoop]: Abstraction has has 246 places, 137 transitions, 893 flow [2020-10-11 16:26:33,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-11 16:26:33,505 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:33,505 INFO L255 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:33,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:33,710 INFO L429 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:26:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1835946127, now seen corresponding path program 19 times [2020-10-11 16:26:33,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:33,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997154237] [2020-10-11 16:26:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:34,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997154237] [2020-10-11 16:26:34,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375420291] [2020-10-11 16:26:34,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-11 16:26:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:34,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:34,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-10-11 16:26:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262674418] [2020-10-11 16:26:34,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-11 16:26:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-11 16:26:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 16:26:46,034 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:26:46,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 137 transitions, 893 flow. Second operand 43 states. [2020-10-11 16:26:46,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:46,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:26:46,038 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:47,370 INFO L129 PetriNetUnfolder]: 4/183 cut-off events. [2020-10-11 16:26:47,370 INFO L130 PetriNetUnfolder]: For 2101/2101 co-relation queries the response was YES. [2020-10-11 16:26:47,371 INFO L80 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 183 events. 4/183 cut-off events. For 2101/2101 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/180 useless extension candidates. Maximal degree in co-relation 638. Up to 21 conditions per place. [2020-10-11 16:26:47,372 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 63 changer transitions 0/141 dead transitions. [2020-10-11 16:26:47,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 141 transitions, 1193 flow [2020-10-11 16:26:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-11 16:26:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 16:26:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4814 transitions. [2020-10-11 16:26:47,380 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7641269841269841 [2020-10-11 16:26:47,380 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4814 transitions. [2020-10-11 16:26:47,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4814 transitions. [2020-10-11 16:26:47,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:47,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4814 transitions. [2020-10-11 16:26:47,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 61 states. [2020-10-11 16:26:47,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 61 states. [2020-10-11 16:26:47,392 INFO L81 ComplementDD]: Finished complementDD. Result 61 states. [2020-10-11 16:26:47,392 INFO L185 Difference]: Start difference. First operand has 246 places, 137 transitions, 893 flow. Second operand 60 states and 4814 transitions. [2020-10-11 16:26:47,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 141 transitions, 1193 flow [2020-10-11 16:26:47,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 141 transitions, 975 flow, removed 52 selfloop flow, removed 53 redundant places. [2020-10-11 16:26:47,406 INFO L241 Difference]: Finished difference. Result has 255 places, 140 transitions, 931 flow [2020-10-11 16:26:47,407 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=931, PETRI_PLACES=255, PETRI_TRANSITIONS=140} [2020-10-11 16:26:47,407 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 165 predicate places. [2020-10-11 16:26:47,407 INFO L481 AbstractCegarLoop]: Abstraction has has 255 places, 140 transitions, 931 flow [2020-10-11 16:26:47,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-11 16:26:47,407 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:47,408 INFO L255 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:47,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:47,623 INFO L429 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:26:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2045129390, now seen corresponding path program 20 times [2020-10-11 16:26:47,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:47,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275324338] [2020-10-11 16:26:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:48,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275324338] [2020-10-11 16:26:48,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816379536] [2020-10-11 16:26:48,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:48,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:26:48,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-11 16:26:48,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:26:48,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:48,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-10-11 16:26:48,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106368336] [2020-10-11 16:26:48,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-11 16:26:48,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:48,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-11 16:26:48,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 16:27:00,955 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:27:00,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 140 transitions, 931 flow. Second operand 45 states. [2020-10-11 16:27:00,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:00,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:27:00,958 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:02,454 INFO L129 PetriNetUnfolder]: 4/188 cut-off events. [2020-10-11 16:27:02,455 INFO L130 PetriNetUnfolder]: For 2330/2330 co-relation queries the response was YES. [2020-10-11 16:27:02,456 INFO L80 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 188 events. 4/188 cut-off events. For 2330/2330 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/185 useless extension candidates. Maximal degree in co-relation 666. Up to 22 conditions per place. [2020-10-11 16:27:02,457 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 66 changer transitions 0/144 dead transitions. [2020-10-11 16:27:02,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 144 transitions, 1245 flow [2020-10-11 16:27:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-11 16:27:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 16:27:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5054 transitions. [2020-10-11 16:27:02,464 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.764021164021164 [2020-10-11 16:27:02,464 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5054 transitions. [2020-10-11 16:27:02,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5054 transitions. [2020-10-11 16:27:02,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:02,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5054 transitions. [2020-10-11 16:27:02,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 64 states. [2020-10-11 16:27:02,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 64 states. [2020-10-11 16:27:02,474 INFO L81 ComplementDD]: Finished complementDD. Result 64 states. [2020-10-11 16:27:02,474 INFO L185 Difference]: Start difference. First operand has 255 places, 140 transitions, 931 flow. Second operand 63 states and 5054 transitions. [2020-10-11 16:27:02,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 144 transitions, 1245 flow [2020-10-11 16:27:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 144 transitions, 1015 flow, removed 55 selfloop flow, removed 56 redundant places. [2020-10-11 16:27:02,486 INFO L241 Difference]: Finished difference. Result has 264 places, 143 transitions, 969 flow [2020-10-11 16:27:02,487 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=969, PETRI_PLACES=264, PETRI_TRANSITIONS=143} [2020-10-11 16:27:02,487 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 174 predicate places. [2020-10-11 16:27:02,487 INFO L481 AbstractCegarLoop]: Abstraction has has 264 places, 143 transitions, 969 flow [2020-10-11 16:27:02,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-11 16:27:02,487 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:02,487 INFO L255 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:02,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 16:27:02,688 INFO L429 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:27:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 100455023, now seen corresponding path program 21 times [2020-10-11 16:27:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:02,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058483689] [2020-10-11 16:27:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:27:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058483689] [2020-10-11 16:27:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595355219] [2020-10-11 16:27:03,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:07,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-11 16:27:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-11 16:27:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:27:07,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:07,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2020-10-11 16:27:07,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307170315] [2020-10-11 16:27:07,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-11 16:27:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-11 16:27:07,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 16:27:22,120 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:27:22,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 143 transitions, 969 flow. Second operand 47 states. [2020-10-11 16:27:22,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:22,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:27:22,123 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:23,894 INFO L129 PetriNetUnfolder]: 4/193 cut-off events. [2020-10-11 16:27:23,894 INFO L130 PetriNetUnfolder]: For 2571/2571 co-relation queries the response was YES. [2020-10-11 16:27:23,895 INFO L80 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 193 events. 4/193 cut-off events. For 2571/2571 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 694. Up to 23 conditions per place. [2020-10-11 16:27:23,897 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 69 changer transitions 0/147 dead transitions. [2020-10-11 16:27:23,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 147 transitions, 1297 flow [2020-10-11 16:27:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-11 16:27:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 16:27:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5294 transitions. [2020-10-11 16:27:23,908 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7639249639249639 [2020-10-11 16:27:23,908 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5294 transitions. [2020-10-11 16:27:23,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5294 transitions. [2020-10-11 16:27:23,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:23,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5294 transitions. [2020-10-11 16:27:23,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 67 states. [2020-10-11 16:27:23,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 67 states. [2020-10-11 16:27:23,951 INFO L81 ComplementDD]: Finished complementDD. Result 67 states. [2020-10-11 16:27:23,951 INFO L185 Difference]: Start difference. First operand has 264 places, 143 transitions, 969 flow. Second operand 66 states and 5294 transitions. [2020-10-11 16:27:23,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 147 transitions, 1297 flow [2020-10-11 16:27:23,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 147 transitions, 1055 flow, removed 58 selfloop flow, removed 59 redundant places. [2020-10-11 16:27:23,970 INFO L241 Difference]: Finished difference. Result has 273 places, 146 transitions, 1007 flow [2020-10-11 16:27:23,971 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1007, PETRI_PLACES=273, PETRI_TRANSITIONS=146} [2020-10-11 16:27:23,971 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 183 predicate places. [2020-10-11 16:27:23,971 INFO L481 AbstractCegarLoop]: Abstraction has has 273 places, 146 transitions, 1007 flow [2020-10-11 16:27:23,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-11 16:27:23,971 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:23,972 INFO L255 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:24,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 16:27:24,172 INFO L429 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:27:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1246660750, now seen corresponding path program 22 times [2020-10-11 16:27:24,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:24,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049108990] [2020-10-11 16:27:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:27:25,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049108990] [2020-10-11 16:27:25,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337327928] [2020-10-11 16:27:25,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:25,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:27:25,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-11 16:27:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:27:25,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:25,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2020-10-11 16:27:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144388606] [2020-10-11 16:27:25,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-11 16:27:25,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-11 16:27:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 16:27:40,910 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:27:40,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 146 transitions, 1007 flow. Second operand 49 states. [2020-10-11 16:27:40,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:40,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:27:40,913 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:42,876 INFO L129 PetriNetUnfolder]: 4/198 cut-off events. [2020-10-11 16:27:42,877 INFO L130 PetriNetUnfolder]: For 2824/2824 co-relation queries the response was YES. [2020-10-11 16:27:42,878 INFO L80 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 198 events. 4/198 cut-off events. For 2824/2824 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 722. Up to 24 conditions per place. [2020-10-11 16:27:42,880 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 72 changer transitions 0/150 dead transitions. [2020-10-11 16:27:42,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 150 transitions, 1349 flow [2020-10-11 16:27:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-11 16:27:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 16:27:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 5534 transitions. [2020-10-11 16:27:42,886 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7638371290545204 [2020-10-11 16:27:42,886 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 5534 transitions. [2020-10-11 16:27:42,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 5534 transitions. [2020-10-11 16:27:42,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:42,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 5534 transitions. [2020-10-11 16:27:42,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 70 states. [2020-10-11 16:27:42,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 70 states. [2020-10-11 16:27:42,896 INFO L81 ComplementDD]: Finished complementDD. Result 70 states. [2020-10-11 16:27:42,896 INFO L185 Difference]: Start difference. First operand has 273 places, 146 transitions, 1007 flow. Second operand 69 states and 5534 transitions. [2020-10-11 16:27:42,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 150 transitions, 1349 flow [2020-10-11 16:27:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 150 transitions, 1095 flow, removed 61 selfloop flow, removed 62 redundant places. [2020-10-11 16:27:42,918 INFO L241 Difference]: Finished difference. Result has 282 places, 149 transitions, 1045 flow [2020-10-11 16:27:42,918 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1045, PETRI_PLACES=282, PETRI_TRANSITIONS=149} [2020-10-11 16:27:42,918 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 192 predicate places. [2020-10-11 16:27:42,918 INFO L481 AbstractCegarLoop]: Abstraction has has 282 places, 149 transitions, 1045 flow [2020-10-11 16:27:42,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-11 16:27:42,919 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:42,919 INFO L255 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:43,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:43,133 INFO L429 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:27:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1262124111, now seen corresponding path program 23 times [2020-10-11 16:27:43,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:43,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129508774] [2020-10-11 16:27:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:27:44,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129508774] [2020-10-11 16:27:44,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370507933] [2020-10-11 16:27:44,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:44,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-11 16:27:44,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-11 16:27:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:27:44,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:44,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2020-10-11 16:27:44,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265534511] [2020-10-11 16:27:44,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-11 16:27:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-11 16:27:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 16:28:02,005 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:28:02,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 149 transitions, 1045 flow. Second operand 51 states. [2020-10-11 16:28:02,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:02,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:28:02,008 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:04,110 INFO L129 PetriNetUnfolder]: 4/203 cut-off events. [2020-10-11 16:28:04,111 INFO L130 PetriNetUnfolder]: For 3089/3089 co-relation queries the response was YES. [2020-10-11 16:28:04,111 INFO L80 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 203 events. 4/203 cut-off events. For 3089/3089 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 750. Up to 25 conditions per place. [2020-10-11 16:28:04,112 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 75 changer transitions 0/153 dead transitions. [2020-10-11 16:28:04,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 153 transitions, 1401 flow [2020-10-11 16:28:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-11 16:28:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 16:28:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5774 transitions. [2020-10-11 16:28:04,117 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7637566137566137 [2020-10-11 16:28:04,117 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5774 transitions. [2020-10-11 16:28:04,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5774 transitions. [2020-10-11 16:28:04,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:04,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5774 transitions. [2020-10-11 16:28:04,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 73 states. [2020-10-11 16:28:04,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 73 states. [2020-10-11 16:28:04,125 INFO L81 ComplementDD]: Finished complementDD. Result 73 states. [2020-10-11 16:28:04,125 INFO L185 Difference]: Start difference. First operand has 282 places, 149 transitions, 1045 flow. Second operand 72 states and 5774 transitions. [2020-10-11 16:28:04,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 153 transitions, 1401 flow [2020-10-11 16:28:04,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 153 transitions, 1135 flow, removed 64 selfloop flow, removed 65 redundant places. [2020-10-11 16:28:04,140 INFO L241 Difference]: Finished difference. Result has 291 places, 152 transitions, 1083 flow [2020-10-11 16:28:04,140 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1083, PETRI_PLACES=291, PETRI_TRANSITIONS=152} [2020-10-11 16:28:04,141 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 201 predicate places. [2020-10-11 16:28:04,141 INFO L481 AbstractCegarLoop]: Abstraction has has 291 places, 152 transitions, 1083 flow [2020-10-11 16:28:04,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-11 16:28:04,141 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:04,141 INFO L255 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:04,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 16:28:04,342 INFO L429 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:28:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash 265484690, now seen corresponding path program 24 times [2020-10-11 16:28:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:04,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477287734] [2020-10-11 16:28:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:28:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477287734] [2020-10-11 16:28:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981692552] [2020-10-11 16:28:05,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:12,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-10-11 16:28:12,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:28:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-11 16:28:12,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:28:12,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:12,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 53 [2020-10-11 16:28:12,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933599891] [2020-10-11 16:28:12,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-11 16:28:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-11 16:28:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 16:28:32,346 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:28:32,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 152 transitions, 1083 flow. Second operand 53 states. [2020-10-11 16:28:32,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:32,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:28:32,350 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:34,770 INFO L129 PetriNetUnfolder]: 4/208 cut-off events. [2020-10-11 16:28:34,771 INFO L130 PetriNetUnfolder]: For 3366/3366 co-relation queries the response was YES. [2020-10-11 16:28:34,772 INFO L80 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 208 events. 4/208 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 778. Up to 26 conditions per place. [2020-10-11 16:28:34,773 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 78 changer transitions 0/156 dead transitions. [2020-10-11 16:28:34,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 156 transitions, 1453 flow [2020-10-11 16:28:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-11 16:28:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 16:28:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6014 transitions. [2020-10-11 16:28:34,777 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7636825396825396 [2020-10-11 16:28:34,777 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6014 transitions. [2020-10-11 16:28:34,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6014 transitions. [2020-10-11 16:28:34,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:34,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6014 transitions. [2020-10-11 16:28:34,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 76 states. [2020-10-11 16:28:34,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 76 states. [2020-10-11 16:28:34,785 INFO L81 ComplementDD]: Finished complementDD. Result 76 states. [2020-10-11 16:28:34,785 INFO L185 Difference]: Start difference. First operand has 291 places, 152 transitions, 1083 flow. Second operand 75 states and 6014 transitions. [2020-10-11 16:28:34,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 156 transitions, 1453 flow [2020-10-11 16:28:34,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 156 transitions, 1175 flow, removed 67 selfloop flow, removed 68 redundant places. [2020-10-11 16:28:34,809 INFO L241 Difference]: Finished difference. Result has 300 places, 155 transitions, 1121 flow [2020-10-11 16:28:34,809 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1121, PETRI_PLACES=300, PETRI_TRANSITIONS=155} [2020-10-11 16:28:34,809 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 210 predicate places. [2020-10-11 16:28:34,809 INFO L481 AbstractCegarLoop]: Abstraction has has 300 places, 155 transitions, 1121 flow [2020-10-11 16:28:34,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-11 16:28:34,810 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:34,810 INFO L255 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:35,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:35,025 INFO L429 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:28:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash 710233647, now seen corresponding path program 25 times [2020-10-11 16:28:35,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:35,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820331201] [2020-10-11 16:28:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:28:36,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820331201] [2020-10-11 16:28:36,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645925078] [2020-10-11 16:28:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:36,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2020-10-11 16:28:36,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:28:36,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:36,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2020-10-11 16:28:36,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935029462] [2020-10-11 16:28:36,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-11 16:28:36,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-11 16:28:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 16:29:00,040 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:29:00,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 155 transitions, 1121 flow. Second operand 55 states. [2020-10-11 16:29:00,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:29:00,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:29:00,043 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:29:02,819 INFO L129 PetriNetUnfolder]: 4/213 cut-off events. [2020-10-11 16:29:02,819 INFO L130 PetriNetUnfolder]: For 3655/3655 co-relation queries the response was YES. [2020-10-11 16:29:02,820 INFO L80 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 213 events. 4/213 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 806. Up to 27 conditions per place. [2020-10-11 16:29:02,822 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 81 changer transitions 0/159 dead transitions. [2020-10-11 16:29:02,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 159 transitions, 1505 flow [2020-10-11 16:29:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-11 16:29:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 16:29:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 6254 transitions. [2020-10-11 16:29:02,828 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7636141636141636 [2020-10-11 16:29:02,828 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 6254 transitions. [2020-10-11 16:29:02,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 6254 transitions. [2020-10-11 16:29:02,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:29:02,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 6254 transitions. [2020-10-11 16:29:02,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 79 states. [2020-10-11 16:29:02,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 79 states. [2020-10-11 16:29:02,840 INFO L81 ComplementDD]: Finished complementDD. Result 79 states. [2020-10-11 16:29:02,840 INFO L185 Difference]: Start difference. First operand has 300 places, 155 transitions, 1121 flow. Second operand 78 states and 6254 transitions. [2020-10-11 16:29:02,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 159 transitions, 1505 flow [2020-10-11 16:29:02,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 159 transitions, 1215 flow, removed 70 selfloop flow, removed 71 redundant places. [2020-10-11 16:29:02,866 INFO L241 Difference]: Finished difference. Result has 309 places, 158 transitions, 1159 flow [2020-10-11 16:29:02,867 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=1159, PETRI_PLACES=309, PETRI_TRANSITIONS=158} [2020-10-11 16:29:02,869 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 219 predicate places. [2020-10-11 16:29:02,869 INFO L481 AbstractCegarLoop]: Abstraction has has 309 places, 158 transitions, 1159 flow [2020-10-11 16:29:02,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-11 16:29:02,870 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:29:02,870 INFO L255 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:29:03,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 16:29:03,084 INFO L429 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:29:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:29:03,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998414, now seen corresponding path program 26 times [2020-10-11 16:29:03,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:29:03,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191823451] [2020-10-11 16:29:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:29:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:29:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:29:05,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191823451] [2020-10-11 16:29:05,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185620815] [2020-10-11 16:29:05,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:05,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:29:05,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:29:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2020-10-11 16:29:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:29:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:29:05,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:29:05,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2020-10-11 16:29:05,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801490529] [2020-10-11 16:29:05,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-11 16:29:05,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:29:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-11 16:29:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 16:29:31,667 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:29:31,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 158 transitions, 1159 flow. Second operand 57 states. [2020-10-11 16:29:31,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:29:31,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:29:31,670 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:29:34,703 INFO L129 PetriNetUnfolder]: 4/218 cut-off events. [2020-10-11 16:29:34,703 INFO L130 PetriNetUnfolder]: For 3956/3956 co-relation queries the response was YES. [2020-10-11 16:29:34,704 INFO L80 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 218 events. 4/218 cut-off events. For 3956/3956 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 834. Up to 28 conditions per place. [2020-10-11 16:29:34,705 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 84 changer transitions 0/162 dead transitions. [2020-10-11 16:29:34,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 162 transitions, 1557 flow [2020-10-11 16:29:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-11 16:29:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 16:29:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6494 transitions. [2020-10-11 16:29:34,712 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7635508524397413 [2020-10-11 16:29:34,713 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6494 transitions. [2020-10-11 16:29:34,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6494 transitions. [2020-10-11 16:29:34,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:29:34,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6494 transitions. [2020-10-11 16:29:34,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 82 states. [2020-10-11 16:29:34,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 82 states. [2020-10-11 16:29:34,722 INFO L81 ComplementDD]: Finished complementDD. Result 82 states. [2020-10-11 16:29:34,722 INFO L185 Difference]: Start difference. First operand has 309 places, 158 transitions, 1159 flow. Second operand 81 states and 6494 transitions. [2020-10-11 16:29:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 162 transitions, 1557 flow [2020-10-11 16:29:34,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 162 transitions, 1255 flow, removed 73 selfloop flow, removed 74 redundant places. [2020-10-11 16:29:34,741 INFO L241 Difference]: Finished difference. Result has 318 places, 161 transitions, 1197 flow [2020-10-11 16:29:34,742 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=1197, PETRI_PLACES=318, PETRI_TRANSITIONS=161} [2020-10-11 16:29:34,742 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 228 predicate places. [2020-10-11 16:29:34,742 INFO L481 AbstractCegarLoop]: Abstraction has has 318 places, 161 transitions, 1197 flow [2020-10-11 16:29:34,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-11 16:29:34,742 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:29:34,742 INFO L255 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:29:34,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 16:29:34,943 INFO L429 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:29:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:29:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1861961743, now seen corresponding path program 27 times [2020-10-11 16:29:34,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:29:34,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125686485] [2020-10-11 16:29:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:29:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:29:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:29:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125686485] [2020-10-11 16:29:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009845061] [2020-10-11 16:29:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:43,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-10-11 16:29:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:29:43,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2020-10-11 16:29:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:29:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:29:43,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:29:43,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 59 [2020-10-11 16:29:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474120920] [2020-10-11 16:29:43,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-11 16:29:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:29:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-11 16:29:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 16:30:13,439 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:30:13,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 161 transitions, 1197 flow. Second operand 59 states. [2020-10-11 16:30:13,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:30:13,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:30:13,441 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:30:16,909 INFO L129 PetriNetUnfolder]: 4/223 cut-off events. [2020-10-11 16:30:16,909 INFO L130 PetriNetUnfolder]: For 4269/4269 co-relation queries the response was YES. [2020-10-11 16:30:16,910 INFO L80 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 223 events. 4/223 cut-off events. For 4269/4269 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 862. Up to 29 conditions per place. [2020-10-11 16:30:16,912 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 87 changer transitions 0/165 dead transitions. [2020-10-11 16:30:16,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 165 transitions, 1609 flow [2020-10-11 16:30:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-11 16:30:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 16:30:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 6734 transitions. [2020-10-11 16:30:16,916 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7634920634920634 [2020-10-11 16:30:16,917 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 6734 transitions. [2020-10-11 16:30:16,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 6734 transitions. [2020-10-11 16:30:16,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:30:16,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 6734 transitions. [2020-10-11 16:30:16,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 85 states. [2020-10-11 16:30:16,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 85 states. [2020-10-11 16:30:16,925 INFO L81 ComplementDD]: Finished complementDD. Result 85 states. [2020-10-11 16:30:16,925 INFO L185 Difference]: Start difference. First operand has 318 places, 161 transitions, 1197 flow. Second operand 84 states and 6734 transitions. [2020-10-11 16:30:16,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 165 transitions, 1609 flow [2020-10-11 16:30:16,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 165 transitions, 1295 flow, removed 76 selfloop flow, removed 77 redundant places. [2020-10-11 16:30:16,944 INFO L241 Difference]: Finished difference. Result has 327 places, 164 transitions, 1235 flow [2020-10-11 16:30:16,945 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=1235, PETRI_PLACES=327, PETRI_TRANSITIONS=164} [2020-10-11 16:30:16,945 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 237 predicate places. [2020-10-11 16:30:16,945 INFO L481 AbstractCegarLoop]: Abstraction has has 327 places, 164 transitions, 1235 flow [2020-10-11 16:30:16,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-11 16:30:16,945 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:30:16,945 INFO L255 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:30:17,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 16:30:17,152 INFO L429 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:30:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:30:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash -210008622, now seen corresponding path program 28 times [2020-10-11 16:30:17,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:30:17,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685340129] [2020-10-11 16:30:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:30:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:30:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:30:19,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685340129] [2020-10-11 16:30:19,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816515096] [2020-10-11 16:30:19,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:30:19,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:30:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:30:19,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjunts are in the unsatisfiable core [2020-10-11 16:30:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:30:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:30:19,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:30:19,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2020-10-11 16:30:19,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339269408] [2020-10-11 16:30:19,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-11 16:30:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:30:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-11 16:30:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 16:30:51,680 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:30:51,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 164 transitions, 1235 flow. Second operand 61 states. [2020-10-11 16:30:51,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:30:51,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:30:51,681 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:30:55,611 INFO L129 PetriNetUnfolder]: 4/228 cut-off events. [2020-10-11 16:30:55,612 INFO L130 PetriNetUnfolder]: For 4594/4594 co-relation queries the response was YES. [2020-10-11 16:30:55,612 INFO L80 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 228 events. 4/228 cut-off events. For 4594/4594 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 890. Up to 30 conditions per place. [2020-10-11 16:30:55,613 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 90 changer transitions 0/168 dead transitions. [2020-10-11 16:30:55,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 168 transitions, 1661 flow [2020-10-11 16:30:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-11 16:30:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 16:30:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 6974 transitions. [2020-10-11 16:30:55,619 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7634373289545703 [2020-10-11 16:30:55,619 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 6974 transitions. [2020-10-11 16:30:55,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 6974 transitions. [2020-10-11 16:30:55,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:30:55,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 6974 transitions. [2020-10-11 16:30:55,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 88 states. [2020-10-11 16:30:55,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 88 states. [2020-10-11 16:30:55,632 INFO L81 ComplementDD]: Finished complementDD. Result 88 states. [2020-10-11 16:30:55,632 INFO L185 Difference]: Start difference. First operand has 327 places, 164 transitions, 1235 flow. Second operand 87 states and 6974 transitions. [2020-10-11 16:30:55,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 168 transitions, 1661 flow [2020-10-11 16:30:55,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 168 transitions, 1335 flow, removed 79 selfloop flow, removed 80 redundant places. [2020-10-11 16:30:55,672 INFO L241 Difference]: Finished difference. Result has 336 places, 167 transitions, 1273 flow [2020-10-11 16:30:55,673 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=1273, PETRI_PLACES=336, PETRI_TRANSITIONS=167} [2020-10-11 16:30:55,673 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 246 predicate places. [2020-10-11 16:30:55,673 INFO L481 AbstractCegarLoop]: Abstraction has has 336 places, 167 transitions, 1273 flow [2020-10-11 16:30:55,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-11 16:30:55,674 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:30:55,675 INFO L255 CegarLoopForPetriNet]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:30:55,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:30:55,876 INFO L429 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:30:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:30:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1554355729, now seen corresponding path program 29 times [2020-10-11 16:30:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:30:55,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929027690] [2020-10-11 16:30:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:30:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:30:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2063 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:30:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929027690] [2020-10-11 16:30:58,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600162085] [2020-10-11 16:30:58,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:30:59,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-10-11 16:30:59,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:30:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 60 conjunts are in the unsatisfiable core [2020-10-11 16:30:59,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:30:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2063 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:30:59,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:30:59,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 63 [2020-10-11 16:30:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557811296] [2020-10-11 16:30:59,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-11 16:30:59,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:30:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-11 16:30:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 16:31:36,138 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:31:36,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 167 transitions, 1273 flow. Second operand 63 states. [2020-10-11 16:31:36,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:31:36,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:31:36,141 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:31:40,857 INFO L129 PetriNetUnfolder]: 4/233 cut-off events. [2020-10-11 16:31:40,858 INFO L130 PetriNetUnfolder]: For 4931/4931 co-relation queries the response was YES. [2020-10-11 16:31:40,859 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 233 events. 4/233 cut-off events. For 4931/4931 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 918. Up to 31 conditions per place. [2020-10-11 16:31:40,860 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 93 changer transitions 0/171 dead transitions. [2020-10-11 16:31:40,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 171 transitions, 1713 flow [2020-10-11 16:31:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-11 16:31:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 16:31:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 7214 transitions. [2020-10-11 16:31:40,867 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7633862433862434 [2020-10-11 16:31:40,867 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 7214 transitions. [2020-10-11 16:31:40,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 7214 transitions. [2020-10-11 16:31:40,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:31:40,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 7214 transitions. [2020-10-11 16:31:40,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 91 states. [2020-10-11 16:31:40,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 91 states. [2020-10-11 16:31:40,880 INFO L81 ComplementDD]: Finished complementDD. Result 91 states. [2020-10-11 16:31:40,880 INFO L185 Difference]: Start difference. First operand has 336 places, 167 transitions, 1273 flow. Second operand 90 states and 7214 transitions. [2020-10-11 16:31:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 171 transitions, 1713 flow [2020-10-11 16:31:40,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 171 transitions, 1375 flow, removed 82 selfloop flow, removed 83 redundant places. [2020-10-11 16:31:40,917 INFO L241 Difference]: Finished difference. Result has 345 places, 170 transitions, 1311 flow [2020-10-11 16:31:40,917 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=1311, PETRI_PLACES=345, PETRI_TRANSITIONS=170} [2020-10-11 16:31:40,918 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 255 predicate places. [2020-10-11 16:31:40,918 INFO L481 AbstractCegarLoop]: Abstraction has has 345 places, 170 transitions, 1311 flow [2020-10-11 16:31:40,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-11 16:31:40,918 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:31:40,918 INFO L255 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:31:41,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 16:31:41,133 INFO L429 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:31:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:31:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1889964018, now seen corresponding path program 30 times [2020-10-11 16:31:41,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:31:41,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139473697] [2020-10-11 16:31:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:31:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:31:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:31:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139473697] [2020-10-11 16:31:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821784443] [2020-10-11 16:31:44,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:32:14,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-10-11 16:32:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:32:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2020-10-11 16:32:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:32:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:32:15,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:32:15,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 65 [2020-10-11 16:32:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906222882] [2020-10-11 16:32:15,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-11 16:32:15,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:32:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-11 16:32:15,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 16:33:01,441 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:33:01,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 170 transitions, 1311 flow. Second operand 65 states. [2020-10-11 16:33:01,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:33:01,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:33:01,444 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:33:06,455 INFO L129 PetriNetUnfolder]: 4/238 cut-off events. [2020-10-11 16:33:06,455 INFO L130 PetriNetUnfolder]: For 5280/5280 co-relation queries the response was YES. [2020-10-11 16:33:06,456 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 238 events. 4/238 cut-off events. For 5280/5280 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 946. Up to 32 conditions per place. [2020-10-11 16:33:06,458 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 96 changer transitions 0/174 dead transitions. [2020-10-11 16:33:06,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 174 transitions, 1765 flow [2020-10-11 16:33:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-11 16:33:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 16:33:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7454 transitions. [2020-10-11 16:33:06,467 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7633384536610343 [2020-10-11 16:33:06,467 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7454 transitions. [2020-10-11 16:33:06,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7454 transitions. [2020-10-11 16:33:06,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:33:06,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7454 transitions. [2020-10-11 16:33:06,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 94 states. [2020-10-11 16:33:06,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 94 states. [2020-10-11 16:33:06,483 INFO L81 ComplementDD]: Finished complementDD. Result 94 states. [2020-10-11 16:33:06,484 INFO L185 Difference]: Start difference. First operand has 345 places, 170 transitions, 1311 flow. Second operand 93 states and 7454 transitions. [2020-10-11 16:33:06,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 174 transitions, 1765 flow [2020-10-11 16:33:06,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 174 transitions, 1415 flow, removed 85 selfloop flow, removed 86 redundant places. [2020-10-11 16:33:06,538 INFO L241 Difference]: Finished difference. Result has 354 places, 173 transitions, 1349 flow [2020-10-11 16:33:06,539 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1349, PETRI_PLACES=354, PETRI_TRANSITIONS=173} [2020-10-11 16:33:06,539 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 264 predicate places. [2020-10-11 16:33:06,539 INFO L481 AbstractCegarLoop]: Abstraction has has 354 places, 173 transitions, 1349 flow [2020-10-11 16:33:06,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-11 16:33:06,539 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:33:06,539 INFO L255 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:33:06,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:33:06,755 INFO L429 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:33:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:33:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash -266292273, now seen corresponding path program 31 times [2020-10-11 16:33:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:33:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508908331] [2020-10-11 16:33:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:33:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:33:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:33:10,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508908331] [2020-10-11 16:33:10,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107749021] [2020-10-11 16:33:10,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:33:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:33:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 64 conjunts are in the unsatisfiable core [2020-10-11 16:33:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:33:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:33:10,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:33:10,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2020-10-11 16:33:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857734175] [2020-10-11 16:33:10,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-11 16:33:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:33:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-11 16:33:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 16:33:59,965 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:33:59,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 173 transitions, 1349 flow. Second operand 67 states. [2020-10-11 16:33:59,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:33:59,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:33:59,972 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:34:05,464 INFO L129 PetriNetUnfolder]: 4/243 cut-off events. [2020-10-11 16:34:05,464 INFO L130 PetriNetUnfolder]: For 5641/5641 co-relation queries the response was YES. [2020-10-11 16:34:05,466 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 243 events. 4/243 cut-off events. For 5641/5641 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 974. Up to 33 conditions per place. [2020-10-11 16:34:05,467 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 99 changer transitions 0/177 dead transitions. [2020-10-11 16:34:05,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 177 transitions, 1817 flow [2020-10-11 16:34:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-11 16:34:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 16:34:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7694 transitions. [2020-10-11 16:34:05,475 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7632936507936507 [2020-10-11 16:34:05,475 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7694 transitions. [2020-10-11 16:34:05,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7694 transitions. [2020-10-11 16:34:05,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:34:05,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7694 transitions. [2020-10-11 16:34:05,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 97 states. [2020-10-11 16:34:05,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 97 states. [2020-10-11 16:34:05,490 INFO L81 ComplementDD]: Finished complementDD. Result 97 states. [2020-10-11 16:34:05,490 INFO L185 Difference]: Start difference. First operand has 354 places, 173 transitions, 1349 flow. Second operand 96 states and 7694 transitions. [2020-10-11 16:34:05,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 177 transitions, 1817 flow [2020-10-11 16:34:05,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 177 transitions, 1455 flow, removed 88 selfloop flow, removed 89 redundant places. [2020-10-11 16:34:05,540 INFO L241 Difference]: Finished difference. Result has 363 places, 176 transitions, 1387 flow [2020-10-11 16:34:05,541 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=1387, PETRI_PLACES=363, PETRI_TRANSITIONS=176} [2020-10-11 16:34:05,541 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 273 predicate places. [2020-10-11 16:34:05,541 INFO L481 AbstractCegarLoop]: Abstraction has has 363 places, 176 transitions, 1387 flow [2020-10-11 16:34:05,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-11 16:34:05,542 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:34:05,542 INFO L255 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:34:05,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 16:34:05,756 INFO L429 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:34:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:34:05,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1067676178, now seen corresponding path program 32 times [2020-10-11 16:34:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:34:05,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175049103] [2020-10-11 16:34:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:34:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:34:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:34:10,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175049103] [2020-10-11 16:34:10,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162082008] [2020-10-11 16:34:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:34:10,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:34:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:34:10,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2020-10-11 16:34:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:34:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:34:10,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:34:10,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2020-10-11 16:34:10,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229265374] [2020-10-11 16:34:10,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-11 16:34:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:34:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-11 16:34:10,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 16:35:07,328 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:35:07,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 176 transitions, 1387 flow. Second operand 69 states. [2020-10-11 16:35:07,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:35:07,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:35:07,331 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:35:13,986 INFO L129 PetriNetUnfolder]: 4/248 cut-off events. [2020-10-11 16:35:13,987 INFO L130 PetriNetUnfolder]: For 6014/6014 co-relation queries the response was YES. [2020-10-11 16:35:13,988 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 248 events. 4/248 cut-off events. For 6014/6014 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 1002. Up to 34 conditions per place. [2020-10-11 16:35:13,989 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 102 changer transitions 0/180 dead transitions. [2020-10-11 16:35:13,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 180 transitions, 1869 flow [2020-10-11 16:35:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-11 16:35:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 16:35:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 7934 transitions. [2020-10-11 16:35:14,002 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7632515632515633 [2020-10-11 16:35:14,002 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 7934 transitions. [2020-10-11 16:35:14,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 7934 transitions. [2020-10-11 16:35:14,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:35:14,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 7934 transitions. [2020-10-11 16:35:14,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 100 states. [2020-10-11 16:35:14,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 100 states. [2020-10-11 16:35:14,032 INFO L81 ComplementDD]: Finished complementDD. Result 100 states. [2020-10-11 16:35:14,032 INFO L185 Difference]: Start difference. First operand has 363 places, 176 transitions, 1387 flow. Second operand 99 states and 7934 transitions. [2020-10-11 16:35:14,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 180 transitions, 1869 flow [2020-10-11 16:35:14,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 180 transitions, 1495 flow, removed 91 selfloop flow, removed 92 redundant places. [2020-10-11 16:35:14,059 INFO L241 Difference]: Finished difference. Result has 372 places, 179 transitions, 1425 flow [2020-10-11 16:35:14,059 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=1425, PETRI_PLACES=372, PETRI_TRANSITIONS=179} [2020-10-11 16:35:14,060 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 282 predicate places. [2020-10-11 16:35:14,060 INFO L481 AbstractCegarLoop]: Abstraction has has 372 places, 179 transitions, 1425 flow [2020-10-11 16:35:14,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-11 16:35:14,060 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:35:14,060 INFO L255 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:35:14,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 16:35:14,261 INFO L429 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:35:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:35:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -58972753, now seen corresponding path program 33 times [2020-10-11 16:35:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:35:14,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547277357] [2020-10-11 16:35:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:35:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:35:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:35:18,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547277357] [2020-10-11 16:35:18,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784187020] [2020-10-11 16:35:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:36:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-10-11 16:36:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:36:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 68 conjunts are in the unsatisfiable core [2020-10-11 16:36:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:36:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:36:01,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:36:01,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2020-10-11 16:36:01,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163929321] [2020-10-11 16:36:01,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-11 16:36:01,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:36:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-11 16:36:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2020-10-11 16:37:04,521 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-11 16:37:04,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 179 transitions, 1425 flow. Second operand 71 states. [2020-10-11 16:37:04,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:37:04,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-11 16:37:04,523 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:37:12,782 INFO L129 PetriNetUnfolder]: 4/253 cut-off events. [2020-10-11 16:37:12,782 INFO L130 PetriNetUnfolder]: For 6399/6399 co-relation queries the response was YES. [2020-10-11 16:37:12,783 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 253 events. 4/253 cut-off events. For 6399/6399 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 1/250 useless extension candidates. Maximal degree in co-relation 1030. Up to 35 conditions per place. [2020-10-11 16:37:12,784 INFO L132 encePairwiseOnDemand]: 96/105 looper letters, 10 selfloop transitions, 105 changer transitions 0/183 dead transitions. [2020-10-11 16:37:12,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 183 transitions, 1921 flow [2020-10-11 16:37:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-11 16:37:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 16:37:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 8174 transitions. [2020-10-11 16:37:12,791 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7632119514472455 [2020-10-11 16:37:12,792 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 8174 transitions. [2020-10-11 16:37:12,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 8174 transitions. [2020-10-11 16:37:12,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:37:12,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 8174 transitions. [2020-10-11 16:37:12,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 103 states. [2020-10-11 16:37:12,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 103 states. [2020-10-11 16:37:12,801 INFO L81 ComplementDD]: Finished complementDD. Result 103 states. [2020-10-11 16:37:12,801 INFO L185 Difference]: Start difference. First operand has 372 places, 179 transitions, 1425 flow. Second operand 102 states and 8174 transitions. [2020-10-11 16:37:12,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 183 transitions, 1921 flow [2020-10-11 16:37:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 183 transitions, 1535 flow, removed 94 selfloop flow, removed 95 redundant places. [2020-10-11 16:37:12,831 INFO L241 Difference]: Finished difference. Result has 381 places, 182 transitions, 1463 flow [2020-10-11 16:37:12,831 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=1463, PETRI_PLACES=381, PETRI_TRANSITIONS=182} [2020-10-11 16:37:12,831 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 291 predicate places. [2020-10-11 16:37:12,831 INFO L481 AbstractCegarLoop]: Abstraction has has 381 places, 182 transitions, 1463 flow [2020-10-11 16:37:12,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-11 16:37:12,832 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:37:12,832 INFO L255 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:37:13,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 16:37:13,033 INFO L429 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 16:37:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:37:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 100936754, now seen corresponding path program 34 times [2020-10-11 16:37:13,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:37:13,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694883995] [2020-10-11 16:37:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:37:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:37:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:37:18,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694883995] [2020-10-11 16:37:18,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097625877] [2020-10-11 16:37:18,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:37:18,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:37:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:37:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 70 conjunts are in the unsatisfiable core [2020-10-11 16:37:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:37:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-11 16:37:18,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:37:18,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2020-10-11 16:37:18,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974071178] [2020-10-11 16:37:18,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-11 16:37:18,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:37:18,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-11 16:37:18,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown