/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:16:27,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:16:27,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:16:27,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:16:27,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:16:27,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:16:27,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:16:27,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:16:27,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:16:27,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:16:27,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:16:27,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:16:27,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:16:27,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:16:27,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:16:27,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:16:27,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:16:27,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:16:27,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:16:27,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:16:27,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:16:27,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:16:27,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:16:27,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:16:27,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:16:27,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:16:27,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:16:27,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:16:27,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:16:27,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:16:27,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:16:27,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:16:27,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:16:27,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:16:27,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:16:27,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:16:27,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:16:27,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:16:27,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:16:27,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:16:27,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:16:27,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:16:27,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:16:27,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:16:27,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:16:27,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:16:27,994 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:16:27,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:16:27,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:16:27,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:16:27,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:16:27,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:16:27,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:16:27,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:16:27,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:16:27,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:16:27,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:16:27,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:16:27,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:16:27,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:16:27,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:16:27,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:16:27,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:16:27,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:16:27,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:16:27,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:16:27,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:16:28,000 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:16:28,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:16:28,000 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:16:28,000 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:16:28,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:16:28,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:16:28,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:16:28,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:16:28,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:16:28,309 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:16:28,310 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-09 14:16:28,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e3523a5/bf574c54a0df45bc835282501aea5204/FLAG0a6994920 [2020-10-09 14:16:28,922 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:16:28,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-10-09 14:16:28,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e3523a5/bf574c54a0df45bc835282501aea5204/FLAG0a6994920 [2020-10-09 14:16:29,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e3523a5/bf574c54a0df45bc835282501aea5204 [2020-10-09 14:16:29,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:16:29,213 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:16:29,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:29,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:16:29,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:16:29,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f0cf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:29, skipping insertion in model container [2020-10-09 14:16:29,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:16:29" (1/1) ... [2020-10-09 14:16:29,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:16:29,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:16:29,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:30,023 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:16:30,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:16:30,213 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:16:30,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30 WrapperNode [2020-10-09 14:16:30,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:16:30,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:30,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:16:30,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:16:30,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:16:30,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:16:30,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:16:30,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:16:30,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (1/1) ... [2020-10-09 14:16:30,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:16:30,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:16:30,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:16:30,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:16:30,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (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 [2020-10-09 14:16:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:16:30,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:16:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 14:16:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-09 14:16:30,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-09 14:16:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:16:30,406 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-09 14:16:30,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:16:30,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:16:30,409 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:16:30,887 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:16:30,887 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-09 14:16:30,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:30 BoogieIcfgContainer [2020-10-09 14:16:30,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:16:30,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:16:30,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:16:30,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:16:30,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:16:29" (1/3) ... [2020-10-09 14:16:30,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2871da2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:30, skipping insertion in model container [2020-10-09 14:16:30,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:16:30" (2/3) ... [2020-10-09 14:16:30,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2871da2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:16:30, skipping insertion in model container [2020-10-09 14:16:30,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:16:30" (3/3) ... [2020-10-09 14:16:30,899 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-09 14:16:30,910 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:16:30,916 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:16:30,917 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:16:30,943 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,943 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,943 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,944 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,944 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,944 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,945 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,945 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,945 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,945 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,946 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,946 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,946 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,946 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,947 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,947 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,947 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,947 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,948 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,948 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,948 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,948 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,949 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,949 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,949 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,949 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,950 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,950 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,950 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,950 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,951 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,951 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,951 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,951 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,952 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,952 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,952 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,952 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,953 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,953 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,953 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,953 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,953 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,954 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,954 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,954 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,954 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,955 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,955 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,955 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,955 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,955 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,956 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,956 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,956 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,956 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,957 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,957 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,957 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,957 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,958 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,958 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,958 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,958 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,959 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,959 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,959 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,959 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,959 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,960 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,960 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,960 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,960 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,961 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,961 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,961 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,962 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,962 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,962 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,962 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,963 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,963 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,963 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,963 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,964 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,964 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,964 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,968 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,968 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,968 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,969 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,969 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,969 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,969 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,970 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,970 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,970 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,970 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,971 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,971 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,971 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,971 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,972 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,972 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,972 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,972 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,972 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,973 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,973 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,973 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,973 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:30,974 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:16:31,005 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:16:31,024 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:16:31,025 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:16:31,025 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:16:31,025 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:16:31,025 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:16:31,025 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:16:31,025 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:16:31,026 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:16:31,040 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-09 14:16:31,097 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-09 14:16:31,097 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-09 14:16:31,103 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-09 14:16:31,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 105 transitions, 218 flow [2020-10-09 14:16:31,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 100 transitions, 205 flow [2020-10-09 14:16:31,129 INFO L129 PetriNetUnfolder]: 9/67 cut-off events. [2020-10-09 14:16:31,129 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:31,130 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:31,131 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:31,131 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:16:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:31,138 INFO L82 PathProgramCache]: Analyzing trace with hash -889928077, now seen corresponding path program 1 times [2020-10-09 14:16:31,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:31,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330081537] [2020-10-09 14:16:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:31,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 14:16:31,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:31,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:31,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330081537] [2020-10-09 14:16:31,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:31,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 14:16:31,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057800496] [2020-10-09 14:16:31,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 14:16:31,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 14:16:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 14:16:31,341 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 105 [2020-10-09 14:16:31,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 205 flow. Second operand 2 states. [2020-10-09 14:16:31,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:31,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 105 [2020-10-09 14:16:31,345 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:31,377 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-10-09 14:16:31,378 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:31,379 INFO L80 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 110 events. 6/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 162 event pairs, 0 based on Foata normal form. 10/109 useless extension candidates. Maximal degree in co-relation 113. Up to 4 conditions per place. [2020-10-09 14:16:31,381 INFO L132 encePairwiseOnDemand]: 97/105 looper letters, 0 selfloop transitions, 0 changer transitions 0/92 dead transitions. [2020-10-09 14:16:31,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 189 flow [2020-10-09 14:16:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 14:16:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 14:16:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2020-10-09 14:16:31,397 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9619047619047619 [2020-10-09 14:16:31,398 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2020-10-09 14:16:31,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2020-10-09 14:16:31,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:31,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2020-10-09 14:16:31,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 14:16:31,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 14:16:31,413 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 14:16:31,415 INFO L185 Difference]: Start difference. First operand has 90 places, 100 transitions, 205 flow. Second operand 2 states and 202 transitions. [2020-10-09 14:16:31,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 189 flow [2020-10-09 14:16:31,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 189 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:16:31,424 INFO L241 Difference]: Finished difference. Result has 91 places, 92 transitions, 189 flow [2020-10-09 14:16:31,427 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=189, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2020-10-09 14:16:31,428 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2020-10-09 14:16:31,429 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 189 flow [2020-10-09 14:16:31,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 14:16:31,429 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:31,429 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:31,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:16:31,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:16:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1395486702, now seen corresponding path program 1 times [2020-10-09 14:16:31,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:31,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051789909] [2020-10-09 14:16:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 14:16:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:31,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:31,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051789909] [2020-10-09 14:16:31,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:16:31,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 14:16:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853876225] [2020-10-09 14:16:31,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:16:31,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:16:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:16:31,958 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2020-10-09 14:16:31,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 189 flow. Second operand 4 states. [2020-10-09 14:16:31,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:31,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2020-10-09 14:16:31,959 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:31,995 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2020-10-09 14:16:31,995 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:16:31,996 INFO L80 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 88 events. 4/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 106. Up to 8 conditions per place. [2020-10-09 14:16:31,997 INFO L132 encePairwiseOnDemand]: 95/105 looper letters, 7 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2020-10-09 14:16:31,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 203 flow [2020-10-09 14:16:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 14:16:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 14:16:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 334 transitions. [2020-10-09 14:16:32,002 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7952380952380952 [2020-10-09 14:16:32,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 334 transitions. [2020-10-09 14:16:32,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 334 transitions. [2020-10-09 14:16:32,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:32,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 334 transitions. [2020-10-09 14:16:32,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 14:16:32,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 14:16:32,008 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 14:16:32,008 INFO L185 Difference]: Start difference. First operand has 91 places, 92 transitions, 189 flow. Second operand 4 states and 334 transitions. [2020-10-09 14:16:32,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 203 flow [2020-10-09 14:16:32,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:16:32,013 INFO L241 Difference]: Finished difference. Result has 86 places, 84 transitions, 210 flow [2020-10-09 14:16:32,013 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2020-10-09 14:16:32,014 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2020-10-09 14:16:32,014 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 210 flow [2020-10-09 14:16:32,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:16:32,015 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:32,015 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:32,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:16:32,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:16:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1508915281, now seen corresponding path program 1 times [2020-10-09 14:16:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:32,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772359963] [2020-10-09 14:16:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:32,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 14:16:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:32,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:32,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772359963] [2020-10-09 14:16:32,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135956749] [2020-10-09 14:16:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 14:16:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:32,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:32,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423855640] [2020-10-09 14:16:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-09 14:16:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:16:32,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 14:16:32,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:32,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:32,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:32,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 14:16:32,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469466399] [2020-10-09 14:16:32,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 14:16:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 14:16:32,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 14:16:33,155 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 105 [2020-10-09 14:16:33,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 210 flow. Second operand 8 states. [2020-10-09 14:16:33,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:33,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 105 [2020-10-09 14:16:33,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:33,268 INFO L129 PetriNetUnfolder]: 4/95 cut-off events. [2020-10-09 14:16:33,268 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2020-10-09 14:16:33,269 INFO L80 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 95 events. 4/95 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 2/93 useless extension candidates. Maximal degree in co-relation 146. Up to 9 conditions per place. [2020-10-09 14:16:33,270 INFO L132 encePairwiseOnDemand]: 95/105 looper letters, 11 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2020-10-09 14:16:33,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 281 flow [2020-10-09 14:16:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 14:16:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 14:16:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 796 transitions. [2020-10-09 14:16:33,276 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.758095238095238 [2020-10-09 14:16:33,276 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 796 transitions. [2020-10-09 14:16:33,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 796 transitions. [2020-10-09 14:16:33,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:33,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 796 transitions. [2020-10-09 14:16:33,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 14:16:33,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 14:16:33,284 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 14:16:33,284 INFO L185 Difference]: Start difference. First operand has 86 places, 84 transitions, 210 flow. Second operand 10 states and 796 transitions. [2020-10-09 14:16:33,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 281 flow [2020-10-09 14:16:33,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 281 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:16:33,289 INFO L241 Difference]: Finished difference. Result has 98 places, 90 transitions, 276 flow [2020-10-09 14:16:33,289 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2020-10-09 14:16:33,289 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2020-10-09 14:16:33,289 INFO L481 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 276 flow [2020-10-09 14:16:33,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 14:16:33,290 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:33,290 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:33,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:33,911 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:16:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1794383473, now seen corresponding path program 2 times [2020-10-09 14:16:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:33,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554126744] [2020-10-09 14:16:33,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:33,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:16:33,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 14:16:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:34,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554126744] [2020-10-09 14:16:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [40017915] [2020-10-09 14:16:34,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:34,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:16:34,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 14:16:34,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:34,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:34,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516253457] [2020-10-09 14:16:34,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:16:34,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:16:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 14:16:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:34,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:34,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:34,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2020-10-09 14:16:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883662641] [2020-10-09 14:16:34,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 14:16:34,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 14:16:34,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-09 14:16:35,767 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 105 [2020-10-09 14:16:35,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 276 flow. Second operand 16 states. [2020-10-09 14:16:35,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:35,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 105 [2020-10-09 14:16:35,771 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:36,034 INFO L129 PetriNetUnfolder]: 4/115 cut-off events. [2020-10-09 14:16:36,034 INFO L130 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2020-10-09 14:16:36,035 INFO L80 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 115 events. 4/115 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 4/115 useless extension candidates. Maximal degree in co-relation 244. Up to 13 conditions per place. [2020-10-09 14:16:36,036 INFO L132 encePairwiseOnDemand]: 95/105 looper letters, 15 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2020-10-09 14:16:36,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 107 transitions, 467 flow [2020-10-09 14:16:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 14:16:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-09 14:16:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1738 transitions. [2020-10-09 14:16:36,043 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2020-10-09 14:16:36,043 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1738 transitions. [2020-10-09 14:16:36,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1738 transitions. [2020-10-09 14:16:36,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:36,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1738 transitions. [2020-10-09 14:16:36,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-09 14:16:36,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-09 14:16:36,054 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-09 14:16:36,054 INFO L185 Difference]: Start difference. First operand has 98 places, 90 transitions, 276 flow. Second operand 22 states and 1738 transitions. [2020-10-09 14:16:36,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 107 transitions, 467 flow [2020-10-09 14:16:36,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 107 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 14:16:36,060 INFO L241 Difference]: Finished difference. Result has 123 places, 103 transitions, 428 flow [2020-10-09 14:16:36,060 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=428, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2020-10-09 14:16:36,061 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 33 predicate places. [2020-10-09 14:16:36,061 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 428 flow [2020-10-09 14:16:36,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 14:16:36,061 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:36,061 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:36,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:36,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:16:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash 627412303, now seen corresponding path program 3 times [2020-10-09 14:16:36,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:36,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992975307] [2020-10-09 14:16:36,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:36,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 14:16:36,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:16:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:36,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:37,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992975307] [2020-10-09 14:16:37,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1213002208] [2020-10-09 14:16:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:37,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 14:16:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:16:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:37,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941508201] [2020-10-09 14:16:37,441 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 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 [2020-10-09 14:16:37,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 14:16:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 14:16:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:37,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:37,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2020-10-09 14:16:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098284277] [2020-10-09 14:16:37,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-09 14:16:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-09 14:16:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-10-09 14:16:41,605 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 105 [2020-10-09 14:16:41,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 428 flow. Second operand 32 states. [2020-10-09 14:16:41,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:16:41,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 105 [2020-10-09 14:16:41,608 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:16:42,357 INFO L129 PetriNetUnfolder]: 4/155 cut-off events. [2020-10-09 14:16:42,357 INFO L130 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2020-10-09 14:16:42,358 INFO L80 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 155 events. 4/155 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 477. Up to 28 conditions per place. [2020-10-09 14:16:42,359 INFO L132 encePairwiseOnDemand]: 95/105 looper letters, 23 selfloop transitions, 49 changer transitions 0/139 dead transitions. [2020-10-09 14:16:42,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 139 transitions, 916 flow [2020-10-09 14:16:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 14:16:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 14:16:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3622 transitions. [2020-10-09 14:16:42,371 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.749896480331263 [2020-10-09 14:16:42,371 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3622 transitions. [2020-10-09 14:16:42,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3622 transitions. [2020-10-09 14:16:42,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:16:42,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3622 transitions. [2020-10-09 14:16:42,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-09 14:16:42,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-09 14:16:42,390 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-09 14:16:42,391 INFO L185 Difference]: Start difference. First operand has 123 places, 103 transitions, 428 flow. Second operand 46 states and 3622 transitions. [2020-10-09 14:16:42,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 139 transitions, 916 flow [2020-10-09 14:16:42,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 139 transitions, 873 flow, removed 14 selfloop flow, removed 6 redundant places. [2020-10-09 14:16:42,402 INFO L241 Difference]: Finished difference. Result has 171 places, 128 transitions, 742 flow [2020-10-09 14:16:42,402 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=742, PETRI_PLACES=171, PETRI_TRANSITIONS=128} [2020-10-09 14:16:42,402 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 81 predicate places. [2020-10-09 14:16:42,403 INFO L481 AbstractCegarLoop]: Abstraction has has 171 places, 128 transitions, 742 flow [2020-10-09 14:16:42,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-09 14:16:42,403 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:16:42,403 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:16:43,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:43,017 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:16:43,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:16:43,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1507408689, now seen corresponding path program 4 times [2020-10-09 14:16:43,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:16:43,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374795844] [2020-10-09 14:16:43,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-09 14:16:43,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:16:43,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-09 14:16:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:43,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:44,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374795844] [2020-10-09 14:16:44,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012764831] [2020-10-09 14:16:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:16:44,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:16:44,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:44,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-09 14:16:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:44,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:44,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207292964] [2020-10-09 14:16:44,871 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 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 [2020-10-09 14:16:44,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:16:44,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:16:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-09 14:16:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:16:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:44,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:16:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:16:45,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:16:45,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 64 [2020-10-09 14:16:45,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783872353] [2020-10-09 14:16:45,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-09 14:16:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:16:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-09 14:16:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 14:17:00,419 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 105 [2020-10-09 14:17:00,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 128 transitions, 742 flow. Second operand 64 states. [2020-10-09 14:17:00,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:17:00,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 105 [2020-10-09 14:17:00,422 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:17:02,915 INFO L129 PetriNetUnfolder]: 4/235 cut-off events. [2020-10-09 14:17:02,916 INFO L130 PetriNetUnfolder]: For 2531/2531 co-relation queries the response was YES. [2020-10-09 14:17:02,917 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 235 events. 4/235 cut-off events. For 2531/2531 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 16/247 useless extension candidates. Maximal degree in co-relation 999. Up to 58 conditions per place. [2020-10-09 14:17:02,918 INFO L132 encePairwiseOnDemand]: 95/105 looper letters, 39 selfloop transitions, 97 changer transitions 0/203 dead transitions. [2020-10-09 14:17:02,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 203 transitions, 1927 flow [2020-10-09 14:17:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-09 14:17:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 14:17:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7313 transitions. [2020-10-09 14:17:02,933 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7488991295442908 [2020-10-09 14:17:02,933 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7313 transitions. [2020-10-09 14:17:02,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7313 transitions. [2020-10-09 14:17:02,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:17:02,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7313 transitions. [2020-10-09 14:17:02,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 94 states. [2020-10-09 14:17:02,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 94 states. [2020-10-09 14:17:02,959 INFO L81 ComplementDD]: Finished complementDD. Result 94 states. [2020-10-09 14:17:02,960 INFO L185 Difference]: Start difference. First operand has 171 places, 128 transitions, 742 flow. Second operand 93 states and 7313 transitions. [2020-10-09 14:17:02,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 203 transitions, 1927 flow [2020-10-09 14:17:02,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 203 transitions, 1836 flow, removed 26 selfloop flow, removed 18 redundant places. [2020-10-09 14:17:02,975 INFO L241 Difference]: Finished difference. Result has 262 places, 177 transitions, 1436 flow [2020-10-09 14:17:02,976 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1436, PETRI_PLACES=262, PETRI_TRANSITIONS=177} [2020-10-09 14:17:02,976 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 172 predicate places. [2020-10-09 14:17:02,976 INFO L481 AbstractCegarLoop]: Abstraction has has 262 places, 177 transitions, 1436 flow [2020-10-09 14:17:02,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-09 14:17:02,977 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:17:02,977 INFO L255 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:17:03,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3,14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:17:03,592 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:17:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:17:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash -266292273, now seen corresponding path program 5 times [2020-10-09 14:17:03,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:17:03,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903529] [2020-10-09 14:17:03,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 14:17:03,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-10-09 14:17:03,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:17:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 64 conjunts are in the unsatisfiable core [2020-10-09 14:17:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:17:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:17:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:17:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:17:09,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903529] [2020-10-09 14:17:09,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1885978672] [2020-10-09 14:17:09,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:17:10,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-10-09 14:17:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:17:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 64 conjunts are in the unsatisfiable core [2020-10-09 14:17:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:17:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:17:10,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:17:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:17:10,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452411166] [2020-10-09 14:17:10,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:17:11,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-10-09 14:17:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:17:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 64 conjunts are in the unsatisfiable core [2020-10-09 14:17:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:17:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:17:11,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:17:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:17:11,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:17:11,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65, 65, 65, 65] total 128 [2020-10-09 14:17:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561425213] [2020-10-09 14:17:11,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-10-09 14:17:11,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:17:11,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-10-09 14:17:11,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2020-10-09 14:18:18,499 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 105 [2020-10-09 14:18:18,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 177 transitions, 1436 flow. Second operand 128 states. [2020-10-09 14:18:18,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:18:18,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 105 [2020-10-09 14:18:18,505 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:18:29,812 INFO L129 PetriNetUnfolder]: 4/395 cut-off events. [2020-10-09 14:18:29,812 INFO L130 PetriNetUnfolder]: For 17921/17921 co-relation queries the response was YES. [2020-10-09 14:18:29,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 395 events. 4/395 cut-off events. For 17921/17921 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 32/423 useless extension candidates. Maximal degree in co-relation 2193. Up to 122 conditions per place. [2020-10-09 14:18:29,817 INFO L132 encePairwiseOnDemand]: 95/105 looper letters, 71 selfloop transitions, 193 changer transitions 0/331 dead transitions. [2020-10-09 14:18:29,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 331 transitions, 4250 flow [2020-10-09 14:18:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2020-10-09 14:18:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-09 14:18:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 14849 transitions. [2020-10-09 14:18:29,855 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7482489292013101 [2020-10-09 14:18:29,856 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 14849 transitions. [2020-10-09 14:18:29,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 14849 transitions. [2020-10-09 14:18:29,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:18:29,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 14849 transitions. [2020-10-09 14:18:29,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 190 states. [2020-10-09 14:18:29,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 190 states. [2020-10-09 14:18:29,936 INFO L81 ComplementDD]: Finished complementDD. Result 190 states. [2020-10-09 14:18:29,937 INFO L185 Difference]: Start difference. First operand has 262 places, 177 transitions, 1436 flow. Second operand 189 states and 14849 transitions. [2020-10-09 14:18:29,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 331 transitions, 4250 flow [2020-10-09 14:18:29,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 331 transitions, 4062 flow, removed 50 selfloop flow, removed 42 redundant places. [2020-10-09 14:18:29,994 INFO L241 Difference]: Finished difference. Result has 441 places, 274 transitions, 2981 flow [2020-10-09 14:18:29,995 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=189, PETRI_FLOW=2981, PETRI_PLACES=441, PETRI_TRANSITIONS=274} [2020-10-09 14:18:29,995 INFO L341 CegarLoopForPetriNet]: 90 programPoint places, 351 predicate places. [2020-10-09 14:18:29,996 INFO L481 AbstractCegarLoop]: Abstraction has has 441 places, 274 transitions, 2981 flow [2020-10-09 14:18:29,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-10-09 14:18:29,996 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:18:29,996 INFO L255 CegarLoopForPetriNet]: trace histogram [63, 63, 63, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:18:30,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:18:30,622 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:18:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:18:30,623 INFO L82 PathProgramCache]: Analyzing trace with hash 670208463, now seen corresponding path program 6 times [2020-10-09 14:18:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:18:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974968898] [2020-10-09 14:18:30,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-10-09 14:18:31,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2020-10-09 14:18:31,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:18:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 128 conjunts are in the unsatisfiable core [2020-10-09 14:18:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:18:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:18:39,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:19:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:19:02,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974968898] [2020-10-09 14:19:02,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888757673] [2020-10-09 14:19:02,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:19:04,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2020-10-09 14:19:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:19:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 128 conjunts are in the unsatisfiable core [2020-10-09 14:19:05,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:19:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:19:05,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:19:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-09 14:19:05,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213010657] [2020-10-09 14:19:05,252 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown