/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-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 19:20:52,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 19:20:52,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 19:20:52,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 19:20:52,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 19:20:52,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 19:20:52,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 19:20:52,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 19:20:52,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 19:20:52,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 19:20:52,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 19:20:52,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 19:20:52,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 19:20:52,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 19:20:52,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 19:20:52,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 19:20:52,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 19:20:52,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 19:20:52,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 19:20:52,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 19:20:52,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 19:20:52,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 19:20:52,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 19:20:52,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 19:20:52,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 19:20:53,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 19:20:53,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 19:20:53,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 19:20:53,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 19:20:53,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 19:20:53,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 19:20:53,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 19:20:53,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 19:20:53,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 19:20:53,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 19:20:53,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 19:20:53,009 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 19:20:53,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 19:20:53,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 19:20:53,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 19:20:53,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 19:20:53,037 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 19:20:53,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 19:20:53,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 19:20:53,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 19:20:53,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 19:20:53,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 19:20:53,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 19:20:53,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 19:20:53,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 19:20:53,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 19:20:53,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 19:20:53,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 19:20:53,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 19:20:53,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 19:20:53,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 19:20:53,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 19:20:53,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 19:20:53,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 19:20:53,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 19:20:53,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 19:20:53,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 19:20:53,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 19:20:53,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 19:20:53,042 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 19:20:53,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 19:20:53,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 19:20:53,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 19:20:53,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 19:20:53,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 19:20:53,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 19:20:53,418 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 19:20:53,419 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-11 19:20:53,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd716aaa8/9b0dad00dc654dfa855b4c825c4779e7/FLAGdf8f5ffdc [2020-10-11 19:20:54,333 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 19:20:54,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-11 19:20:54,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd716aaa8/9b0dad00dc654dfa855b4c825c4779e7/FLAGdf8f5ffdc [2020-10-11 19:20:54,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd716aaa8/9b0dad00dc654dfa855b4c825c4779e7 [2020-10-11 19:20:54,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 19:20:54,449 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 19:20:54,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 19:20:54,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 19:20:54,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 19:20:54,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:20:54" (1/1) ... [2020-10-11 19:20:54,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957e935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:54, skipping insertion in model container [2020-10-11 19:20:54,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:20:54" (1/1) ... [2020-10-11 19:20:54,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 19:20:54,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 19:20:55,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:20:55,396 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 19:20:55,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:20:55,815 INFO L208 MainTranslator]: Completed translation [2020-10-11 19:20:55,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55 WrapperNode [2020-10-11 19:20:55,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 19:20:55,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 19:20:55,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 19:20:55,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 19:20:55,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 19:20:55,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 19:20:55,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 19:20:55,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 19:20:55,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (1/1) ... [2020-10-11 19:20:55,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 19:20:55,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 19:20:55,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 19:20:55,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 19:20:55,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (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 19:20:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 19:20:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 19:20:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 19:20:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-10-11 19:20:56,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-10-11 19:20:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 19:20:56,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 19:20:56,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 19:20:56,071 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 19:20:56,592 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 19:20:56,592 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-11 19:20:56,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:20:56 BoogieIcfgContainer [2020-10-11 19:20:56,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 19:20:56,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 19:20:56,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 19:20:56,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 19:20:56,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:20:54" (1/3) ... [2020-10-11 19:20:56,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b0d05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:20:56, skipping insertion in model container [2020-10-11 19:20:56,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:20:55" (2/3) ... [2020-10-11 19:20:56,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b0d05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:20:56, skipping insertion in model container [2020-10-11 19:20:56,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:20:56" (3/3) ... [2020-10-11 19:20:56,608 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-10-11 19:20:56,623 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 19:20:56,632 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 19:20:56,634 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 19:20:56,664 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,665 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,665 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,665 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,666 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,666 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,666 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,666 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,667 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,667 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,667 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,668 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,668 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,668 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,668 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,669 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,669 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,669 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,670 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,670 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,670 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,674 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,675 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,675 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,675 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,676 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,676 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,676 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,676 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:20:56,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 19:20:56,731 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 19:20:56,731 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 19:20:56,732 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 19:20:56,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 19:20:56,732 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 19:20:56,732 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 19:20:56,732 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 19:20:56,732 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 19:20:56,749 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-10-11 19:20:56,807 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-10-11 19:20:56,807 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:20:56,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-11 19:20:56,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 85 transitions, 178 flow [2020-10-11 19:20:56,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 156 flow [2020-10-11 19:20:56,867 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2020-10-11 19:20:56,868 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:20:56,868 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:56,870 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:56,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2068775339, now seen corresponding path program 1 times [2020-10-11 19:20:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:56,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066900410] [2020-10-11 19:20:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:20:57,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066900410] [2020-10-11 19:20:57,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:20:57,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 19:20:57,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492529762] [2020-10-11 19:20:57,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 19:20:57,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 19:20:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 19:20:57,246 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 85 [2020-10-11 19:20:57,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 156 flow. Second operand 2 states. [2020-10-11 19:20:57,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:57,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 85 [2020-10-11 19:20:57,249 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:57,282 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2020-10-11 19:20:57,282 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:20:57,283 INFO L80 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 69 events. 2/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/70 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2020-10-11 19:20:57,285 INFO L132 encePairwiseOnDemand]: 81/85 looper letters, 0 selfloop transitions, 0 changer transitions 0/69 dead transitions. [2020-10-11 19:20:57,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 144 flow [2020-10-11 19:20:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 19:20:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 19:20:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2020-10-11 19:20:57,310 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9411764705882353 [2020-10-11 19:20:57,311 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2020-10-11 19:20:57,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2020-10-11 19:20:57,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:57,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2020-10-11 19:20:57,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 19:20:57,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 19:20:57,342 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 19:20:57,345 INFO L185 Difference]: Start difference. First operand has 73 places, 75 transitions, 156 flow. Second operand 2 states and 160 transitions. [2020-10-11 19:20:57,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 144 flow [2020-10-11 19:20:57,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 19:20:57,359 INFO L241 Difference]: Finished difference. Result has 70 places, 69 transitions, 140 flow [2020-10-11 19:20:57,363 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=140, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2020-10-11 19:20:57,364 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2020-10-11 19:20:57,365 INFO L481 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 140 flow [2020-10-11 19:20:57,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 19:20:57,365 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:57,365 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 19:20:57,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:57,367 INFO L82 PathProgramCache]: Analyzing trace with hash -8377837, now seen corresponding path program 1 times [2020-10-11 19:20:57,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:57,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647253502] [2020-10-11 19:20:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:20:57,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647253502] [2020-10-11 19:20:57,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:20:57,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 19:20:57,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228756798] [2020-10-11 19:20:57,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:20:57,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:20:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 19:20:57,560 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 85 [2020-10-11 19:20:57,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 140 flow. Second operand 3 states. [2020-10-11 19:20:57,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:57,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 85 [2020-10-11 19:20:57,561 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:57,590 INFO L129 PetriNetUnfolder]: 2/76 cut-off events. [2020-10-11 19:20:57,591 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 19:20:57,592 INFO L80 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 2/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2020-10-11 19:20:57,593 INFO L132 encePairwiseOnDemand]: 82/85 looper letters, 4 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2020-10-11 19:20:57,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 154 flow [2020-10-11 19:20:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:20:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:20:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2020-10-11 19:20:57,598 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8862745098039215 [2020-10-11 19:20:57,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2020-10-11 19:20:57,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2020-10-11 19:20:57,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:57,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2020-10-11 19:20:57,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:20:57,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:20:57,607 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:20:57,607 INFO L185 Difference]: Start difference. First operand has 70 places, 69 transitions, 140 flow. Second operand 3 states and 226 transitions. [2020-10-11 19:20:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 154 flow [2020-10-11 19:20:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 19:20:57,623 INFO L241 Difference]: Finished difference. Result has 73 places, 70 transitions, 152 flow [2020-10-11 19:20:57,626 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2020-10-11 19:20:57,628 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2020-10-11 19:20:57,631 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 152 flow [2020-10-11 19:20:57,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:20:57,632 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:57,632 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:57,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 19:20:57,633 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1055662168, now seen corresponding path program 1 times [2020-10-11 19:20:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:57,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479148154] [2020-10-11 19:20:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:20:57,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479148154] [2020-10-11 19:20:57,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024783283] [2020-10-11 19:20:57,819 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 19:20:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-11 19:20:57,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:20:58,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 19:20:58,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-10-11 19:20:58,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176333528] [2020-10-11 19:20:58,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:20:58,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:20:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 19:20:58,065 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 85 [2020-10-11 19:20:58,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 152 flow. Second operand 3 states. [2020-10-11 19:20:58,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:58,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 85 [2020-10-11 19:20:58,066 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:58,093 INFO L129 PetriNetUnfolder]: 2/80 cut-off events. [2020-10-11 19:20:58,093 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:20:58,094 INFO L80 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 80 events. 2/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2020-10-11 19:20:58,095 INFO L132 encePairwiseOnDemand]: 82/85 looper letters, 4 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2020-10-11 19:20:58,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 166 flow [2020-10-11 19:20:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:20:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:20:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2020-10-11 19:20:58,099 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8862745098039215 [2020-10-11 19:20:58,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2020-10-11 19:20:58,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2020-10-11 19:20:58,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:58,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2020-10-11 19:20:58,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:20:58,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:20:58,104 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:20:58,104 INFO L185 Difference]: Start difference. First operand has 73 places, 70 transitions, 152 flow. Second operand 3 states and 226 transitions. [2020-10-11 19:20:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 166 flow [2020-10-11 19:20:58,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:20:58,108 INFO L241 Difference]: Finished difference. Result has 75 places, 71 transitions, 162 flow [2020-10-11 19:20:58,109 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2020-10-11 19:20:58,109 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2020-10-11 19:20:58,110 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 162 flow [2020-10-11 19:20:58,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:20:58,110 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:58,110 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:20:58,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-11 19:20:58,325 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash 96648646, now seen corresponding path program 1 times [2020-10-11 19:20:58,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:58,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792265218] [2020-10-11 19:20:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:20:58,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792265218] [2020-10-11 19:20:58,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994040615] [2020-10-11 19:20:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:20:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:20:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:20:58,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:58,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 19:20:58,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121138202] [2020-10-11 19:20:58,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:20:58,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:20:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 19:20:58,673 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:20:58,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 162 flow. Second operand 7 states. [2020-10-11 19:20:58,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:58,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:20:58,674 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:58,745 INFO L129 PetriNetUnfolder]: 2/88 cut-off events. [2020-10-11 19:20:58,746 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-11 19:20:58,747 INFO L80 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 88 events. 2/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 111. Up to 8 conditions per place. [2020-10-11 19:20:58,748 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2020-10-11 19:20:58,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 196 flow [2020-10-11 19:20:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 19:20:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 19:20:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 439 transitions. [2020-10-11 19:20:58,753 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8607843137254902 [2020-10-11 19:20:58,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 439 transitions. [2020-10-11 19:20:58,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 439 transitions. [2020-10-11 19:20:58,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:58,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 439 transitions. [2020-10-11 19:20:58,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 19:20:58,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 19:20:58,760 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 19:20:58,761 INFO L185 Difference]: Start difference. First operand has 75 places, 71 transitions, 162 flow. Second operand 6 states and 439 transitions. [2020-10-11 19:20:58,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 196 flow [2020-10-11 19:20:58,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:20:58,765 INFO L241 Difference]: Finished difference. Result has 82 places, 74 transitions, 192 flow [2020-10-11 19:20:58,766 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2020-10-11 19:20:58,767 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2020-10-11 19:20:58,767 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 192 flow [2020-10-11 19:20:58,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:20:58,767 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:58,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:58,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:20:58,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1051483269, now seen corresponding path program 2 times [2020-10-11 19:20:58,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:58,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119289300] [2020-10-11 19:20:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:20:59,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119289300] [2020-10-11 19:20:59,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101312243] [2020-10-11 19:20:59,127 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 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 19:20:59,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:20:59,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:20:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:20:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:20:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:20:59,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:20:59,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 19:20:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298039433] [2020-10-11 19:20:59,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:20:59,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:20:59,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:20:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 19:20:59,490 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:20:59,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 192 flow. Second operand 7 states. [2020-10-11 19:20:59,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:20:59,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:20:59,491 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:20:59,577 INFO L129 PetriNetUnfolder]: 2/93 cut-off events. [2020-10-11 19:20:59,577 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-10-11 19:20:59,579 INFO L80 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 93 events. 2/93 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 1/93 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2020-10-11 19:20:59,580 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2020-10-11 19:20:59,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 226 flow [2020-10-11 19:20:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 19:20:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 19:20:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 439 transitions. [2020-10-11 19:20:59,584 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8607843137254902 [2020-10-11 19:20:59,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 439 transitions. [2020-10-11 19:20:59,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 439 transitions. [2020-10-11 19:20:59,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:20:59,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 439 transitions. [2020-10-11 19:20:59,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 19:20:59,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 19:20:59,591 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 19:20:59,591 INFO L185 Difference]: Start difference. First operand has 82 places, 74 transitions, 192 flow. Second operand 6 states and 439 transitions. [2020-10-11 19:20:59,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 226 flow [2020-10-11 19:20:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 220 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-11 19:20:59,600 INFO L241 Difference]: Finished difference. Result has 88 places, 77 transitions, 218 flow [2020-10-11 19:20:59,600 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2020-10-11 19:20:59,601 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 15 predicate places. [2020-10-11 19:20:59,601 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 218 flow [2020-10-11 19:20:59,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:20:59,602 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:20:59,602 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:59,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:20:59,817 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:20:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:20:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1019356189, now seen corresponding path program 3 times [2020-10-11 19:20:59,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:20:59,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328745107] [2020-10-11 19:20:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:20:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:20:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-11 19:20:59,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328745107] [2020-10-11 19:20:59,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044959558] [2020-10-11 19:20:59,924 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 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 19:21:00,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 19:21:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:21:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-11 19:21:00,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:00,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-11 19:21:00,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214030296] [2020-10-11 19:21:00,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 19:21:00,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 19:21:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 19:21:00,153 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:21:00,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 218 flow. Second operand 9 states. [2020-10-11 19:21:00,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:00,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:21:00,154 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:00,265 INFO L129 PetriNetUnfolder]: 2/101 cut-off events. [2020-10-11 19:21:00,265 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-10-11 19:21:00,267 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 101 events. 2/101 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2020-10-11 19:21:00,268 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2020-10-11 19:21:00,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 81 transitions, 266 flow [2020-10-11 19:21:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 19:21:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 19:21:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 655 transitions. [2020-10-11 19:21:00,272 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8562091503267973 [2020-10-11 19:21:00,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 655 transitions. [2020-10-11 19:21:00,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 655 transitions. [2020-10-11 19:21:00,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:00,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 655 transitions. [2020-10-11 19:21:00,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 19:21:00,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 19:21:00,278 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 19:21:00,278 INFO L185 Difference]: Start difference. First operand has 88 places, 77 transitions, 218 flow. Second operand 9 states and 655 transitions. [2020-10-11 19:21:00,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 81 transitions, 266 flow [2020-10-11 19:21:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 81 transitions, 260 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-11 19:21:00,282 INFO L241 Difference]: Finished difference. Result has 97 places, 80 transitions, 256 flow [2020-10-11 19:21:00,283 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2020-10-11 19:21:00,283 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 24 predicate places. [2020-10-11 19:21:00,283 INFO L481 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 256 flow [2020-10-11 19:21:00,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 19:21:00,284 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:00,284 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:00,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:21:00,500 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash 358620706, now seen corresponding path program 4 times [2020-10-11 19:21:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:00,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113563374] [2020-10-11 19:21:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-11 19:21:00,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113563374] [2020-10-11 19:21:00,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943385408] [2020-10-11 19:21:00,682 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 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 19:21:00,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:21:00,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:00,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 19:21:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-11 19:21:00,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:00,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 19:21:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279530424] [2020-10-11 19:21:00,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 19:21:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 19:21:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 19:21:01,062 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:21:01,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 256 flow. Second operand 11 states. [2020-10-11 19:21:01,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:01,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:21:01,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:01,158 INFO L129 PetriNetUnfolder]: 2/109 cut-off events. [2020-10-11 19:21:01,159 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2020-10-11 19:21:01,160 INFO L80 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 109 events. 2/109 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 185. Up to 8 conditions per place. [2020-10-11 19:21:01,161 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2020-10-11 19:21:01,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 84 transitions, 318 flow [2020-10-11 19:21:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 19:21:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 19:21:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 871 transitions. [2020-10-11 19:21:01,165 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8539215686274509 [2020-10-11 19:21:01,165 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 871 transitions. [2020-10-11 19:21:01,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 871 transitions. [2020-10-11 19:21:01,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:01,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 871 transitions. [2020-10-11 19:21:01,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 19:21:01,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 19:21:01,171 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 19:21:01,171 INFO L185 Difference]: Start difference. First operand has 97 places, 80 transitions, 256 flow. Second operand 12 states and 871 transitions. [2020-10-11 19:21:01,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 84 transitions, 318 flow [2020-10-11 19:21:01,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 84 transitions, 300 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-11 19:21:01,176 INFO L241 Difference]: Finished difference. Result has 106 places, 83 transitions, 294 flow [2020-10-11 19:21:01,176 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=294, PETRI_PLACES=106, PETRI_TRANSITIONS=83} [2020-10-11 19:21:01,176 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2020-10-11 19:21:01,176 INFO L481 AbstractCegarLoop]: Abstraction has has 106 places, 83 transitions, 294 flow [2020-10-11 19:21:01,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 19:21:01,177 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:01,177 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:01,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-11 19:21:01,393 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1162198233, now seen corresponding path program 5 times [2020-10-11 19:21:01,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:01,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345936920] [2020-10-11 19:21:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-11 19:21:01,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345936920] [2020-10-11 19:21:01,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381219078] [2020-10-11 19:21:01,510 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 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 19:21:01,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 19:21:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:21:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-11 19:21:01,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:01,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-10-11 19:21:01,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619127921] [2020-10-11 19:21:01,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 19:21:01,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:01,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 19:21:01,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 19:21:02,828 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 85 [2020-10-11 19:21:02,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 83 transitions, 294 flow. Second operand 16 states. [2020-10-11 19:21:02,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:02,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 85 [2020-10-11 19:21:02,830 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:05,182 INFO L129 PetriNetUnfolder]: 261/927 cut-off events. [2020-10-11 19:21:05,183 INFO L130 PetriNetUnfolder]: For 1637/1637 co-relation queries the response was YES. [2020-10-11 19:21:05,188 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2655 conditions, 927 events. 261/927 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4888 event pairs, 20 based on Foata normal form. 33/957 useless extension candidates. Maximal degree in co-relation 2637. Up to 81 conditions per place. [2020-10-11 19:21:05,199 INFO L132 encePairwiseOnDemand]: 75/85 looper letters, 121 selfloop transitions, 224 changer transitions 0/400 dead transitions. [2020-10-11 19:21:05,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 400 transitions, 3016 flow [2020-10-11 19:21:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-10-11 19:21:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-11 19:21:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 7599 transitions. [2020-10-11 19:21:05,225 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7911504424778761 [2020-10-11 19:21:05,226 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 7599 transitions. [2020-10-11 19:21:05,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 7599 transitions. [2020-10-11 19:21:05,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:05,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 7599 transitions. [2020-10-11 19:21:05,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 114 states. [2020-10-11 19:21:05,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 114 states. [2020-10-11 19:21:05,269 INFO L81 ComplementDD]: Finished complementDD. Result 114 states. [2020-10-11 19:21:05,269 INFO L185 Difference]: Start difference. First operand has 106 places, 83 transitions, 294 flow. Second operand 113 states and 7599 transitions. [2020-10-11 19:21:05,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 400 transitions, 3016 flow [2020-10-11 19:21:05,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 400 transitions, 2776 flow, removed 56 selfloop flow, removed 8 redundant places. [2020-10-11 19:21:05,293 INFO L241 Difference]: Finished difference. Result has 267 places, 291 transitions, 2292 flow [2020-10-11 19:21:05,294 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=2292, PETRI_PLACES=267, PETRI_TRANSITIONS=291} [2020-10-11 19:21:05,294 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 194 predicate places. [2020-10-11 19:21:05,295 INFO L481 AbstractCegarLoop]: Abstraction has has 267 places, 291 transitions, 2292 flow [2020-10-11 19:21:05,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 19:21:05,295 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:05,295 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:05,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:21:05,509 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 408774872, now seen corresponding path program 6 times [2020-10-11 19:21:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:05,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644239820] [2020-10-11 19:21:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-11 19:21:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644239820] [2020-10-11 19:21:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818088429] [2020-10-11 19:21:05,657 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 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 19:21:05,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 19:21:05,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 19:21:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-11 19:21:05,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:05,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 19:21:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060948733] [2020-10-11 19:21:05,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 19:21:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 19:21:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 19:21:05,918 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:21:05,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 291 transitions, 2292 flow. Second operand 11 states. [2020-10-11 19:21:05,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:05,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:21:05,919 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:06,191 INFO L129 PetriNetUnfolder]: 161/659 cut-off events. [2020-10-11 19:21:06,191 INFO L130 PetriNetUnfolder]: For 11433/11500 co-relation queries the response was YES. [2020-10-11 19:21:06,200 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 659 events. 161/659 cut-off events. For 11433/11500 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3091 event pairs, 34 based on Foata normal form. 27/668 useless extension candidates. Maximal degree in co-relation 3093. Up to 61 conditions per place. [2020-10-11 19:21:06,206 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 115 changer transitions 0/295 dead transitions. [2020-10-11 19:21:06,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 295 transitions, 2666 flow [2020-10-11 19:21:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 19:21:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 19:21:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 871 transitions. [2020-10-11 19:21:06,208 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8539215686274509 [2020-10-11 19:21:06,209 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 871 transitions. [2020-10-11 19:21:06,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 871 transitions. [2020-10-11 19:21:06,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:06,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 871 transitions. [2020-10-11 19:21:06,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 19:21:06,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 19:21:06,212 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 19:21:06,213 INFO L185 Difference]: Start difference. First operand has 267 places, 291 transitions, 2292 flow. Second operand 12 states and 871 transitions. [2020-10-11 19:21:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 295 transitions, 2666 flow [2020-10-11 19:21:06,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 295 transitions, 2122 flow, removed 136 selfloop flow, removed 14 redundant places. [2020-10-11 19:21:06,278 INFO L241 Difference]: Finished difference. Result has 267 places, 294 transitions, 2116 flow [2020-10-11 19:21:06,279 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2116, PETRI_PLACES=267, PETRI_TRANSITIONS=294} [2020-10-11 19:21:06,279 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 194 predicate places. [2020-10-11 19:21:06,279 INFO L481 AbstractCegarLoop]: Abstraction has has 267 places, 294 transitions, 2116 flow [2020-10-11 19:21:06,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 19:21:06,280 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:06,280 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:06,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:21:06,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash -609455276, now seen corresponding path program 7 times [2020-10-11 19:21:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:06,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289059109] [2020-10-11 19:21:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-11 19:21:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289059109] [2020-10-11 19:21:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147811230] [2020-10-11 19:21:06,613 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 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 19:21:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 19:21:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 19 proven. 85 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 19:21:06,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:06,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-10-11 19:21:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563807203] [2020-10-11 19:21:06,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 19:21:06,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:06,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 19:21:06,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-11 19:21:07,748 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 85 [2020-10-11 19:21:07,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 294 transitions, 2116 flow. Second operand 22 states. [2020-10-11 19:21:07,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:07,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 85 [2020-10-11 19:21:07,750 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:16,447 INFO L129 PetriNetUnfolder]: 438/1473 cut-off events. [2020-10-11 19:21:16,447 INFO L130 PetriNetUnfolder]: For 49757/49774 co-relation queries the response was YES. [2020-10-11 19:21:16,468 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9474 conditions, 1473 events. 438/1473 cut-off events. For 49757/49774 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8545 event pairs, 20 based on Foata normal form. 56/1526 useless extension candidates. Maximal degree in co-relation 9395. Up to 154 conditions per place. [2020-10-11 19:21:16,486 INFO L132 encePairwiseOnDemand]: 75/85 looper letters, 172 selfloop transitions, 476 changer transitions 0/703 dead transitions. [2020-10-11 19:21:16,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 703 transitions, 13140 flow [2020-10-11 19:21:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2020-10-11 19:21:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-11 19:21:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 15975 transitions. [2020-10-11 19:21:16,510 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7863647551070637 [2020-10-11 19:21:16,510 INFO L72 ComplementDD]: Start complementDD. Operand 239 states and 15975 transitions. [2020-10-11 19:21:16,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 239 states and 15975 transitions. [2020-10-11 19:21:16,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:16,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 239 states and 15975 transitions. [2020-10-11 19:21:16,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 240 states. [2020-10-11 19:21:16,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 240 states. [2020-10-11 19:21:16,562 INFO L81 ComplementDD]: Finished complementDD. Result 240 states. [2020-10-11 19:21:16,562 INFO L185 Difference]: Start difference. First operand has 267 places, 294 transitions, 2116 flow. Second operand 239 states and 15975 transitions. [2020-10-11 19:21:16,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 703 transitions, 13140 flow [2020-10-11 19:21:16,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 703 transitions, 11644 flow, removed 629 selfloop flow, removed 7 redundant places. [2020-10-11 19:21:16,716 INFO L241 Difference]: Finished difference. Result has 582 places, 543 transitions, 7404 flow [2020-10-11 19:21:16,718 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=239, PETRI_FLOW=7404, PETRI_PLACES=582, PETRI_TRANSITIONS=543} [2020-10-11 19:21:16,718 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 509 predicate places. [2020-10-11 19:21:16,718 INFO L481 AbstractCegarLoop]: Abstraction has has 582 places, 543 transitions, 7404 flow [2020-10-11 19:21:16,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 19:21:16,718 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:16,719 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:16,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 19:21:16,920 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2000020445, now seen corresponding path program 8 times [2020-10-11 19:21:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:16,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655630681] [2020-10-11 19:21:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-11 19:21:17,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655630681] [2020-10-11 19:21:17,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349933864] [2020-10-11 19:21:17,150 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 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 19:21:17,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:21:17,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:17,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 19:21:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-11 19:21:17,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:17,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 19:21:17,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314578052] [2020-10-11 19:21:17,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 19:21:17,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:17,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 19:21:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 19:21:17,623 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:21:17,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 543 transitions, 7404 flow. Second operand 15 states. [2020-10-11 19:21:17,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:17,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:21:17,625 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:18,749 INFO L129 PetriNetUnfolder]: 333/1214 cut-off events. [2020-10-11 19:21:18,750 INFO L130 PetriNetUnfolder]: For 92355/92420 co-relation queries the response was YES. [2020-10-11 19:21:18,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9947 conditions, 1214 events. 333/1214 cut-off events. For 92355/92420 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 6604 event pairs, 67 based on Foata normal form. 44/1239 useless extension candidates. Maximal degree in co-relation 9784. Up to 142 conditions per place. [2020-10-11 19:21:18,818 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 241 changer transitions 0/547 dead transitions. [2020-10-11 19:21:18,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 547 transitions, 8174 flow [2020-10-11 19:21:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 19:21:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 19:21:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1303 transitions. [2020-10-11 19:21:18,823 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8516339869281045 [2020-10-11 19:21:18,823 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1303 transitions. [2020-10-11 19:21:18,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1303 transitions. [2020-10-11 19:21:18,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:18,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1303 transitions. [2020-10-11 19:21:18,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 19:21:18,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 19:21:18,832 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 19:21:18,832 INFO L185 Difference]: Start difference. First operand has 582 places, 543 transitions, 7404 flow. Second operand 18 states and 1303 transitions. [2020-10-11 19:21:18,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 547 transitions, 8174 flow [2020-10-11 19:21:19,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 547 transitions, 4522 flow, removed 1426 selfloop flow, removed 116 redundant places. [2020-10-11 19:21:19,600 INFO L241 Difference]: Finished difference. Result has 486 places, 546 transitions, 4486 flow [2020-10-11 19:21:19,601 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4486, PETRI_PLACES=486, PETRI_TRANSITIONS=546} [2020-10-11 19:21:19,602 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 413 predicate places. [2020-10-11 19:21:19,602 INFO L481 AbstractCegarLoop]: Abstraction has has 486 places, 546 transitions, 4486 flow [2020-10-11 19:21:19,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 19:21:19,602 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:19,602 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:19,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:21:19,819 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 320280977, now seen corresponding path program 9 times [2020-10-11 19:21:19,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:19,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213674905] [2020-10-11 19:21:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 16 proven. 81 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-11 19:21:20,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213674905] [2020-10-11 19:21:20,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472265397] [2020-10-11 19:21:20,074 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 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 19:21:20,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 19:21:20,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:20,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 19:21:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 16 proven. 81 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-11 19:21:20,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:20,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-11 19:21:20,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717003030] [2020-10-11 19:21:20,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 19:21:20,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 19:21:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 19:21:20,820 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:21:20,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 546 transitions, 4486 flow. Second operand 17 states. [2020-10-11 19:21:20,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:20,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:21:20,825 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:21,566 INFO L129 PetriNetUnfolder]: 359/1325 cut-off events. [2020-10-11 19:21:21,566 INFO L130 PetriNetUnfolder]: For 111837/111970 co-relation queries the response was YES. [2020-10-11 19:21:21,591 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9797 conditions, 1325 events. 359/1325 cut-off events. For 111837/111970 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7477 event pairs, 84 based on Foata normal form. 83/1385 useless extension candidates. Maximal degree in co-relation 9631. Up to 128 conditions per place. [2020-10-11 19:21:21,603 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 244 changer transitions 0/550 dead transitions. [2020-10-11 19:21:21,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 550 transitions, 5270 flow [2020-10-11 19:21:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 19:21:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 19:21:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1519 transitions. [2020-10-11 19:21:21,606 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8509803921568627 [2020-10-11 19:21:21,606 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1519 transitions. [2020-10-11 19:21:21,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1519 transitions. [2020-10-11 19:21:21,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:21,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1519 transitions. [2020-10-11 19:21:21,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 19:21:21,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 19:21:21,613 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 19:21:21,613 INFO L185 Difference]: Start difference. First operand has 486 places, 546 transitions, 4486 flow. Second operand 21 states and 1519 transitions. [2020-10-11 19:21:21,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 550 transitions, 5270 flow [2020-10-11 19:21:21,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 550 transitions, 4680 flow, removed 82 selfloop flow, removed 13 redundant places. [2020-10-11 19:21:21,951 INFO L241 Difference]: Finished difference. Result has 496 places, 549 transitions, 4610 flow [2020-10-11 19:21:21,952 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4610, PETRI_PLACES=496, PETRI_TRANSITIONS=549} [2020-10-11 19:21:21,953 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 423 predicate places. [2020-10-11 19:21:21,953 INFO L481 AbstractCegarLoop]: Abstraction has has 496 places, 549 transitions, 4610 flow [2020-10-11 19:21:21,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 19:21:21,953 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:21,954 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:22,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:21:22,163 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:22,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1648665141, now seen corresponding path program 10 times [2020-10-11 19:21:22,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:22,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660015485] [2020-10-11 19:21:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-11 19:21:22,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660015485] [2020-10-11 19:21:22,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591192972] [2020-10-11 19:21:22,372 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 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 19:21:22,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:21:22,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 19:21:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-11 19:21:22,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:22,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2020-10-11 19:21:22,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779933909] [2020-10-11 19:21:22,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 19:21:22,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 19:21:22,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-11 19:21:24,358 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 85 [2020-10-11 19:21:24,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 549 transitions, 4610 flow. Second operand 30 states. [2020-10-11 19:21:24,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:24,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 85 [2020-10-11 19:21:24,360 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:21:39,551 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-10-11 19:21:53,687 INFO L129 PetriNetUnfolder]: 729/2331 cut-off events. [2020-10-11 19:21:53,688 INFO L130 PetriNetUnfolder]: For 279043/279101 co-relation queries the response was YES. [2020-10-11 19:21:53,726 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 2331 events. 729/2331 cut-off events. For 279043/279101 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 14829 event pairs, 20 based on Foata normal form. 84/2412 useless extension candidates. Maximal degree in co-relation 22855. Up to 255 conditions per place. [2020-10-11 19:21:53,762 INFO L132 encePairwiseOnDemand]: 75/85 looper letters, 241 selfloop transitions, 920 changer transitions 0/1216 dead transitions. [2020-10-11 19:21:53,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 956 places, 1216 transitions, 34686 flow [2020-10-11 19:21:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 461 states. [2020-10-11 19:21:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-11 19:21:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 30708 transitions. [2020-10-11 19:21:53,799 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7836672195993365 [2020-10-11 19:21:53,799 INFO L72 ComplementDD]: Start complementDD. Operand 461 states and 30708 transitions. [2020-10-11 19:21:53,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 461 states and 30708 transitions. [2020-10-11 19:21:53,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:21:53,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 461 states and 30708 transitions. [2020-10-11 19:21:53,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 462 states. [2020-10-11 19:21:53,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 462 states. [2020-10-11 19:21:53,901 INFO L81 ComplementDD]: Finished complementDD. Result 462 states. [2020-10-11 19:21:53,901 INFO L185 Difference]: Start difference. First operand has 496 places, 549 transitions, 4610 flow. Second operand 461 states and 30708 transitions. [2020-10-11 19:21:53,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 956 places, 1216 transitions, 34686 flow [2020-10-11 19:21:54,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 939 places, 1216 transitions, 30606 flow, removed 1700 selfloop flow, removed 17 redundant places. [2020-10-11 19:21:54,710 INFO L241 Difference]: Finished difference. Result has 1059 places, 987 transitions, 18056 flow [2020-10-11 19:21:54,712 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=461, PETRI_FLOW=18056, PETRI_PLACES=1059, PETRI_TRANSITIONS=987} [2020-10-11 19:21:54,712 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 986 predicate places. [2020-10-11 19:21:54,712 INFO L481 AbstractCegarLoop]: Abstraction has has 1059 places, 987 transitions, 18056 flow [2020-10-11 19:21:54,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 19:21:54,713 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:21:54,713 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:21:54,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 19:21:54,928 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:21:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:21:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1030418636, now seen corresponding path program 11 times [2020-10-11 19:21:54,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:21:54,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767619700] [2020-10-11 19:21:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:21:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:21:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 13 proven. 148 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-11 19:21:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767619700] [2020-10-11 19:21:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250208173] [2020-10-11 19:21:55,239 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 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 19:21:55,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 19:21:55,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:21:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 19:21:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:21:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 15 proven. 175 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-10-11 19:21:55,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:21:55,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-10-11 19:21:55,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866353590] [2020-10-11 19:21:55,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-11 19:21:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:21:55,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-11 19:21:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 19:21:58,876 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 85 [2020-10-11 19:21:58,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1059 places, 987 transitions, 18056 flow. Second operand 34 states. [2020-10-11 19:21:58,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:21:58,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 85 [2020-10-11 19:21:58,878 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:22:56,394 INFO L129 PetriNetUnfolder]: 900/2963 cut-off events. [2020-10-11 19:22:56,394 INFO L130 PetriNetUnfolder]: For 816534/816587 co-relation queries the response was YES. [2020-10-11 19:22:56,463 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40721 conditions, 2963 events. 900/2963 cut-off events. For 816534/816587 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 19667 event pairs, 20 based on Foata normal form. 94/3054 useless extension candidates. Maximal degree in co-relation 40432. Up to 348 conditions per place. [2020-10-11 19:22:56,508 INFO L132 encePairwiseOnDemand]: 75/85 looper letters, 274 selfloop transitions, 1196 changer transitions 0/1525 dead transitions. [2020-10-11 19:22:56,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1657 places, 1525 transitions, 64018 flow [2020-10-11 19:22:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 599 states. [2020-10-11 19:22:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-11 19:22:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 39855 transitions. [2020-10-11 19:22:56,553 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7827752135912796 [2020-10-11 19:22:56,554 INFO L72 ComplementDD]: Start complementDD. Operand 599 states and 39855 transitions. [2020-10-11 19:22:56,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 599 states and 39855 transitions. [2020-10-11 19:22:56,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:22:56,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 599 states and 39855 transitions. [2020-10-11 19:22:56,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 600 states. [2020-10-11 19:22:56,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 600 states. [2020-10-11 19:22:56,656 INFO L81 ComplementDD]: Finished complementDD. Result 600 states. [2020-10-11 19:22:56,656 INFO L185 Difference]: Start difference. First operand has 1059 places, 987 transitions, 18056 flow. Second operand 599 states and 39855 transitions. [2020-10-11 19:22:56,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1657 places, 1525 transitions, 64018 flow [2020-10-11 19:23:00,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1412 places, 1525 transitions, 51942 flow, removed 5113 selfloop flow, removed 245 redundant places. [2020-10-11 19:23:00,702 INFO L241 Difference]: Finished difference. Result has 1550 places, 1263 transitions, 27320 flow [2020-10-11 19:23:00,705 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=814, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=920, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=599, PETRI_FLOW=27320, PETRI_PLACES=1550, PETRI_TRANSITIONS=1263} [2020-10-11 19:23:00,705 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 1477 predicate places. [2020-10-11 19:23:00,705 INFO L481 AbstractCegarLoop]: Abstraction has has 1550 places, 1263 transitions, 27320 flow [2020-10-11 19:23:00,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-11 19:23:00,706 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:23:00,706 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:00,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 19:23:00,907 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:23:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:23:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1073821015, now seen corresponding path program 12 times [2020-10-11 19:23:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:23:00,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578908854] [2020-10-11 19:23:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:23:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-11 19:23:01,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578908854] [2020-10-11 19:23:01,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443313693] [2020-10-11 19:23:01,349 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 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 19:23:01,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 19:23:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:23:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 19:23:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:23:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-11 19:23:01,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:23:01,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 19:23:01,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157818359] [2020-10-11 19:23:01,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 19:23:01,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:23:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 19:23:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-10-11 19:23:02,216 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:23:02,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1550 places, 1263 transitions, 27320 flow. Second operand 23 states. [2020-10-11 19:23:02,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:23:02,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:23:02,218 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:23:05,617 INFO L129 PetriNetUnfolder]: 803/2831 cut-off events. [2020-10-11 19:23:05,618 INFO L130 PetriNetUnfolder]: For 1171810/1171924 co-relation queries the response was YES. [2020-10-11 19:23:05,763 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39953 conditions, 2831 events. 803/2831 cut-off events. For 1171810/1171924 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 18557 event pairs, 140 based on Foata normal form. 68/2876 useless extension candidates. Maximal degree in co-relation 39526. Up to 274 conditions per place. [2020-10-11 19:23:05,800 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 601 changer transitions 0/1267 dead transitions. [2020-10-11 19:23:05,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1579 places, 1267 transitions, 29170 flow [2020-10-11 19:23:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 19:23:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 19:23:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2167 transitions. [2020-10-11 19:23:05,805 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8498039215686275 [2020-10-11 19:23:05,806 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2167 transitions. [2020-10-11 19:23:05,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2167 transitions. [2020-10-11 19:23:05,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:23:05,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2167 transitions. [2020-10-11 19:23:05,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 19:23:05,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 19:23:05,814 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 19:23:05,814 INFO L185 Difference]: Start difference. First operand has 1550 places, 1263 transitions, 27320 flow. Second operand 30 states and 2167 transitions. [2020-10-11 19:23:05,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1579 places, 1267 transitions, 29170 flow [2020-10-11 19:23:16,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1119 places, 1267 transitions, 11578 flow, removed 7747 selfloop flow, removed 460 redundant places. [2020-10-11 19:23:16,086 INFO L241 Difference]: Finished difference. Result has 1122 places, 1266 transitions, 11464 flow [2020-10-11 19:23:16,090 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=9728, PETRI_DIFFERENCE_MINUEND_PLACES=1090, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11464, PETRI_PLACES=1122, PETRI_TRANSITIONS=1266} [2020-10-11 19:23:16,090 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 1049 predicate places. [2020-10-11 19:23:16,090 INFO L481 AbstractCegarLoop]: Abstraction has has 1122 places, 1266 transitions, 11464 flow [2020-10-11 19:23:16,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 19:23:16,091 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:23:16,091 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:16,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 19:23:16,306 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:23:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:23:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1452406257, now seen corresponding path program 13 times [2020-10-11 19:23:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:23:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027610518] [2020-10-11 19:23:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:23:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 68 proven. 241 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-10-11 19:23:16,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027610518] [2020-10-11 19:23:16,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762522880] [2020-10-11 19:23:16,872 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 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 19:23:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 19:23:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:23:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 68 proven. 241 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-10-11 19:23:17,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:23:17,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-10-11 19:23:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133530771] [2020-10-11 19:23:17,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 19:23:17,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:23:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 19:23:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-11 19:23:18,177 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:23:18,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1122 places, 1266 transitions, 11464 flow. Second operand 25 states. [2020-10-11 19:23:18,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:23:18,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:23:18,179 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:23:23,415 INFO L129 PetriNetUnfolder]: 843/2940 cut-off events. [2020-10-11 19:23:23,416 INFO L130 PetriNetUnfolder]: For 1108900/1109085 co-relation queries the response was YES. [2020-10-11 19:23:23,515 INFO L80 FinitePrefix]: Finished finitePrefix Result has 34032 conditions, 2940 events. 843/2940 cut-off events. For 1108900/1109085 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 19318 event pairs, 183 based on Foata normal form. 72/2983 useless extension candidates. Maximal degree in co-relation 33602. Up to 285 conditions per place. [2020-10-11 19:23:23,547 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 604 changer transitions 0/1270 dead transitions. [2020-10-11 19:23:23,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1154 places, 1270 transitions, 13328 flow [2020-10-11 19:23:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 19:23:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 19:23:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2383 transitions. [2020-10-11 19:23:23,553 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8495543672014261 [2020-10-11 19:23:23,554 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2383 transitions. [2020-10-11 19:23:23,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2383 transitions. [2020-10-11 19:23:23,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:23:23,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2383 transitions. [2020-10-11 19:23:23,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 19:23:23,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 19:23:23,561 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 19:23:23,562 INFO L185 Difference]: Start difference. First operand has 1122 places, 1266 transitions, 11464 flow. Second operand 33 states and 2383 transitions. [2020-10-11 19:23:23,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1154 places, 1270 transitions, 13328 flow [2020-10-11 19:23:30,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1129 places, 1270 transitions, 11802 flow, removed 199 selfloop flow, removed 25 redundant places. [2020-10-11 19:23:30,644 INFO L241 Difference]: Finished difference. Result has 1132 places, 1269 transitions, 11642 flow [2020-10-11 19:23:30,646 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=9938, PETRI_DIFFERENCE_MINUEND_PLACES=1097, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11642, PETRI_PLACES=1132, PETRI_TRANSITIONS=1269} [2020-10-11 19:23:30,647 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 1059 predicate places. [2020-10-11 19:23:30,647 INFO L481 AbstractCegarLoop]: Abstraction has has 1132 places, 1269 transitions, 11642 flow [2020-10-11 19:23:30,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 19:23:30,647 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:23:30,648 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:30,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:23:30,858 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:23:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:23:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1026741437, now seen corresponding path program 14 times [2020-10-11 19:23:30,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:23:30,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288976065] [2020-10-11 19:23:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:23:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:23:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 22 proven. 340 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-11 19:23:31,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288976065] [2020-10-11 19:23:31,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982696345] [2020-10-11 19:23:31,606 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 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 19:23:31,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:23:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:23:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 19:23:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:23:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 105 proven. 237 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-11 19:23:32,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:23:32,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 42 [2020-10-11 19:23:32,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537976814] [2020-10-11 19:23:32,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-11 19:23:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:23:32,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-11 19:23:32,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 19:23:39,062 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 85 [2020-10-11 19:23:39,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1132 places, 1269 transitions, 11642 flow. Second operand 42 states. [2020-10-11 19:23:39,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:23:39,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 85 [2020-10-11 19:23:39,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:26:35,903 INFO L129 PetriNetUnfolder]: 1281/4079 cut-off events. [2020-10-11 19:26:35,904 INFO L130 PetriNetUnfolder]: For 2223633/2223731 co-relation queries the response was YES. [2020-10-11 19:26:36,759 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67229 conditions, 4079 events. 1281/4079 cut-off events. For 2223633/2223731 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 28364 event pairs, 20 based on Foata normal form. 115/4191 useless extension candidates. Maximal degree in co-relation 66796. Up to 416 conditions per place. [2020-10-11 19:26:36,807 INFO L132 encePairwiseOnDemand]: 75/85 looper letters, 343 selfloop transitions, 1820 changer transitions 0/2218 dead transitions. [2020-10-11 19:26:36,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2042 places, 2218 transitions, 108822 flow [2020-10-11 19:26:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 911 states. [2020-10-11 19:26:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 911 states. [2020-10-11 19:26:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 60528 transitions. [2020-10-11 19:26:36,874 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7816620391295925 [2020-10-11 19:26:36,875 INFO L72 ComplementDD]: Start complementDD. Operand 911 states and 60528 transitions. [2020-10-11 19:26:36,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 911 states and 60528 transitions. [2020-10-11 19:26:36,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:26:36,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 911 states and 60528 transitions. [2020-10-11 19:26:36,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 912 states. [2020-10-11 19:26:37,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 912 states. [2020-10-11 19:26:37,076 INFO L81 ComplementDD]: Finished complementDD. Result 912 states. [2020-10-11 19:26:37,076 INFO L185 Difference]: Start difference. First operand has 1132 places, 1269 transitions, 11642 flow. Second operand 911 states and 60528 transitions. [2020-10-11 19:26:37,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2042 places, 2218 transitions, 108822 flow [2020-10-11 19:26:50,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2014 places, 2218 transitions, 96862 flow, removed 5252 selfloop flow, removed 28 redundant places. [2020-10-11 19:26:50,387 INFO L241 Difference]: Finished difference. Result has 2188 places, 1887 transitions, 50994 flow [2020-10-11 19:26:50,390 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=10060, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=911, PETRI_FLOW=50994, PETRI_PLACES=2188, PETRI_TRANSITIONS=1887} [2020-10-11 19:26:50,390 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 2115 predicate places. [2020-10-11 19:26:50,390 INFO L481 AbstractCegarLoop]: Abstraction has has 2188 places, 1887 transitions, 50994 flow [2020-10-11 19:26:50,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-11 19:26:50,390 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:26:50,391 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:26:50,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 19:26:50,605 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:26:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:26:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2130271682, now seen corresponding path program 15 times [2020-10-11 19:26:50,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:26:50,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219528013] [2020-10-11 19:26:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:26:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:26:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 17 proven. 342 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-10-11 19:26:51,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219528013] [2020-10-11 19:26:51,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180536119] [2020-10-11 19:26:51,238 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 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 19:26:51,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 19:26:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:26:51,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 19:26:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:26:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 23 proven. 297 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-11 19:26:52,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:26:52,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 46 [2020-10-11 19:26:52,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856189372] [2020-10-11 19:26:52,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-11 19:26:52,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:26:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-11 19:26:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 19:27:05,035 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 85 [2020-10-11 19:27:05,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2188 places, 1887 transitions, 50994 flow. Second operand 46 states. [2020-10-11 19:27:05,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:27:05,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 85 [2020-10-11 19:27:05,037 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:32:03,065 INFO L129 PetriNetUnfolder]: 1506/4833 cut-off events. [2020-10-11 19:32:03,066 INFO L130 PetriNetUnfolder]: For 4786400/4786550 co-relation queries the response was YES. [2020-10-11 19:32:03,285 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106107 conditions, 4833 events. 1506/4833 cut-off events. For 4786400/4786550 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 34494 event pairs, 13 based on Foata normal form. 132/4962 useless extension candidates. Maximal degree in co-relation 105500. Up to 526 conditions per place. [2020-10-11 19:32:03,327 INFO L132 encePairwiseOnDemand]: 75/85 looper letters, 376 selfloop transitions, 2204 changer transitions 0/2635 dead transitions. [2020-10-11 19:32:03,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 3290 places, 2635 transitions, 177086 flow [2020-10-11 19:32:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1103 states. [2020-10-11 19:32:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-10-11 19:32:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 73239 transitions. [2020-10-11 19:32:03,367 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7811743373686737 [2020-10-11 19:32:03,367 INFO L72 ComplementDD]: Start complementDD. Operand 1103 states and 73239 transitions. [2020-10-11 19:32:03,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1103 states and 73239 transitions. [2020-10-11 19:32:03,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:32:03,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1103 states and 73239 transitions. [2020-10-11 19:32:03,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 1104 states. [2020-10-11 19:32:03,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 1104 states. [2020-10-11 19:32:03,506 INFO L81 ComplementDD]: Finished complementDD. Result 1104 states. [2020-10-11 19:32:03,506 INFO L185 Difference]: Start difference. First operand has 2188 places, 1887 transitions, 50994 flow. Second operand 1103 states and 73239 transitions. [2020-10-11 19:32:03,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 3290 places, 2635 transitions, 177086 flow [2020-10-11 19:32:42,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2684 places, 2635 transitions, 137754 flow, removed 17806 selfloop flow, removed 606 redundant places. [2020-10-11 19:32:42,071 INFO L241 Difference]: Finished difference. Result has 2876 places, 2271 transitions, 66878 flow [2020-10-11 19:32:42,074 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=14752, PETRI_DIFFERENCE_MINUEND_PLACES=1582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1820, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1103, PETRI_FLOW=66878, PETRI_PLACES=2876, PETRI_TRANSITIONS=2271} [2020-10-11 19:32:42,074 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 2803 predicate places. [2020-10-11 19:32:42,074 INFO L481 AbstractCegarLoop]: Abstraction has has 2876 places, 2271 transitions, 66878 flow [2020-10-11 19:32:42,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-11 19:32:42,074 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:32:42,075 INFO L255 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:42,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 19:32:42,284 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:32:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:32:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1410954579, now seen corresponding path program 16 times [2020-10-11 19:32:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:32:42,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176627977] [2020-10-11 19:32:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:32:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:32:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 19 proven. 403 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-11 19:32:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176627977] [2020-10-11 19:32:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920032438] [2020-10-11 19:32:43,700 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 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 19:32:43,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:32:43,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:32:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 19:32:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:32:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 19 proven. 403 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-11 19:32:43,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:32:43,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-10-11 19:32:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759926106] [2020-10-11 19:32:43,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 19:32:43,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:32:43,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 19:32:43,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-11 19:32:47,256 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:32:47,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2876 places, 2271 transitions, 66878 flow. Second operand 31 states. [2020-10-11 19:32:47,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:32:47,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:32:47,258 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:32:56,302 INFO L129 PetriNetUnfolder]: 1415/4710 cut-off events. [2020-10-11 19:32:56,302 INFO L130 PetriNetUnfolder]: For 5809969/5810308 co-relation queries the response was YES. [2020-10-11 19:32:56,611 INFO L80 FinitePrefix]: Finished finitePrefix Result has 98106 conditions, 4710 events. 1415/4710 cut-off events. For 5809969/5810308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 33457 event pairs, 208 based on Foata normal form. 80/4757 useless extension candidates. Maximal degree in co-relation 97307. Up to 476 conditions per place. [2020-10-11 19:32:56,645 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 1105 changer transitions 0/2275 dead transitions. [2020-10-11 19:32:56,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2917 places, 2275 transitions, 70192 flow [2020-10-11 19:32:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 19:32:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 19:32:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3031 transitions. [2020-10-11 19:32:56,652 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8490196078431372 [2020-10-11 19:32:56,652 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3031 transitions. [2020-10-11 19:32:56,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3031 transitions. [2020-10-11 19:32:56,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:32:56,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3031 transitions. [2020-10-11 19:32:56,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-11 19:32:56,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-11 19:32:56,656 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-11 19:32:56,656 INFO L185 Difference]: Start difference. First operand has 2876 places, 2271 transitions, 66878 flow. Second operand 42 states and 3031 transitions. [2020-10-11 19:32:56,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2917 places, 2275 transitions, 70192 flow [2020-10-11 19:34:06,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2007 places, 2275 transitions, 21610 flow, removed 22288 selfloop flow, removed 910 redundant places. [2020-10-11 19:34:06,315 INFO L241 Difference]: Finished difference. Result has 2010 places, 2274 transitions, 21394 flow [2020-10-11 19:34:06,318 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=18296, PETRI_DIFFERENCE_MINUEND_PLACES=1966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=21394, PETRI_PLACES=2010, PETRI_TRANSITIONS=2274} [2020-10-11 19:34:06,318 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 1937 predicate places. [2020-10-11 19:34:06,318 INFO L481 AbstractCegarLoop]: Abstraction has has 2010 places, 2274 transitions, 21394 flow [2020-10-11 19:34:06,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 19:34:06,318 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:34:06,319 INFO L255 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:06,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:34:06,520 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:34:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:34:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2092799125, now seen corresponding path program 17 times [2020-10-11 19:34:06,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:34:06,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431503712] [2020-10-11 19:34:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:34:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:34:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 28 proven. 539 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-11 19:34:08,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431503712] [2020-10-11 19:34:08,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235381300] [2020-10-11 19:34:08,098 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 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 19:34:08,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-11 19:34:08,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:34:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 19:34:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:34:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 28 proven. 539 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-11 19:34:08,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:34:08,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-10-11 19:34:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418399697] [2020-10-11 19:34:08,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-11 19:34:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:34:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-11 19:34:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 19:34:12,048 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 85 [2020-10-11 19:34:12,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2010 places, 2274 transitions, 21394 flow. Second operand 33 states. [2020-10-11 19:34:12,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:34:12,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 85 [2020-10-11 19:34:12,051 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:34:19,859 INFO L129 PetriNetUnfolder]: 1475/4927 cut-off events. [2020-10-11 19:34:19,859 INFO L130 PetriNetUnfolder]: For 5356953/5357253 co-relation queries the response was YES. [2020-10-11 19:34:20,341 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82765 conditions, 4927 events. 1475/4927 cut-off events. For 5356953/5357253 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 35206 event pairs, 265 based on Foata normal form. 98/4988 useless extension candidates. Maximal degree in co-relation 81963. Up to 497 conditions per place. [2020-10-11 19:34:20,370 INFO L132 encePairwiseOnDemand]: 80/85 looper letters, 7 selfloop transitions, 1108 changer transitions 0/2278 dead transitions. [2020-10-11 19:34:20,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2054 places, 2278 transitions, 24722 flow [2020-10-11 19:34:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 19:34:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 19:34:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3247 transitions. [2020-10-11 19:34:20,377 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8488888888888889 [2020-10-11 19:34:20,378 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3247 transitions. [2020-10-11 19:34:20,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3247 transitions. [2020-10-11 19:34:20,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:34:20,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3247 transitions. [2020-10-11 19:34:20,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-11 19:34:20,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-11 19:34:20,385 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-11 19:34:20,385 INFO L185 Difference]: Start difference. First operand has 2010 places, 2274 transitions, 21394 flow. Second operand 45 states and 3247 transitions. [2020-10-11 19:34:20,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2054 places, 2278 transitions, 24722 flow Received shutdown request... [2020-10-11 19:34:25,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:34:25,005 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 19:34:25,012 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 19:34:25,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 07:34:25 BasicIcfg [2020-10-11 19:34:25,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 19:34:25,015 INFO L168 Benchmark]: Toolchain (without parser) took 810566.55 ms. Allocated memory was 250.1 MB in the beginning and 4.3 GB in the end (delta: 4.1 GB). Free memory was 204.6 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.8 GB. Max. memory is 14.2 GB. [2020-10-11 19:34:25,015 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 250.1 MB. Free memory is still 226.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 19:34:25,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1366.53 ms. Allocated memory was 250.1 MB in the beginning and 309.9 MB in the end (delta: 59.8 MB). Free memory was 204.6 MB in the beginning and 212.1 MB in the end (delta: -7.5 MB). Peak memory consumption was 62.7 MB. Max. memory is 14.2 GB. [2020-10-11 19:34:25,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.58 ms. Allocated memory is still 309.9 MB. Free memory was 212.1 MB in the beginning and 209.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 19:34:25,017 INFO L168 Benchmark]: Boogie Preprocessor took 45.78 ms. Allocated memory is still 309.9 MB. Free memory was 209.6 MB in the beginning and 207.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 19:34:25,017 INFO L168 Benchmark]: RCFGBuilder took 629.47 ms. Allocated memory is still 309.9 MB. Free memory was 207.1 MB in the beginning and 180.2 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-11 19:34:25,018 INFO L168 Benchmark]: TraceAbstraction took 808415.26 ms. Allocated memory was 309.9 MB in the beginning and 4.3 GB in the end (delta: 4.0 GB). Free memory was 180.2 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.7 GB. Max. memory is 14.2 GB. [2020-10-11 19:34:25,021 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 250.1 MB. Free memory is still 226.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1366.53 ms. Allocated memory was 250.1 MB in the beginning and 309.9 MB in the end (delta: 59.8 MB). Free memory was 204.6 MB in the beginning and 212.1 MB in the end (delta: -7.5 MB). Peak memory consumption was 62.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 101.58 ms. Allocated memory is still 309.9 MB. Free memory was 212.1 MB in the beginning and 209.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 45.78 ms. Allocated memory is still 309.9 MB. Free memory was 209.6 MB in the beginning and 207.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 629.47 ms. Allocated memory is still 309.9 MB. Free memory was 207.1 MB in the beginning and 180.2 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 808415.26 ms. Allocated memory was 309.9 MB in the beginning and 4.3 GB in the end (delta: 4.0 GB). Free memory was 180.2 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.7 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: TIMEOUT, OverallTime: 808.2s, OverallIterations: 20, TraceHistogramMax: 14, AutomataDifference: 790.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 263 SDtfs, 8514 SDslu, 4324 SDs, 0 SdLazy, 5339 SolverSat, 2867 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8961 GetRequests, 5158 SyntacticMatches, 0 SemanticMatches, 3803 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396726 ImplicationChecksByTransitivity, 556.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66878occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 4768 NumberOfCodeBlocks, 4745 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 4730 ConstructedInterpolants, 0 QuantifiedInterpolants, 1452374 SizeOfPredicates, 228 NumberOfNonLiveVariables, 4946 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 38 InterpolantComputations, 3 PerfectInterpolantSequences, 4761/9904 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown