/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 23:31:36,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 23:31:36,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 23:31:36,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 23:31:36,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 23:31:36,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 23:31:36,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 23:31:36,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 23:31:36,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 23:31:36,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 23:31:36,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 23:31:36,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 23:31:36,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 23:31:36,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 23:31:36,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 23:31:36,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 23:31:36,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 23:31:36,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 23:31:36,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 23:31:36,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 23:31:36,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 23:31:36,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 23:31:36,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 23:31:36,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 23:31:36,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 23:31:36,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 23:31:36,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 23:31:36,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 23:31:36,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 23:31:36,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 23:31:36,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 23:31:36,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 23:31:36,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 23:31:36,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 23:31:36,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 23:31:36,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 23:31:36,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-15 23:31:36,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 23:31:36,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 23:31:36,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 23:31:36,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 23:31:36,457 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 23:31:36,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 23:31:36,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 23:31:36,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 23:31:36,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 23:31:36,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 23:31:36,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 23:31:36,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 23:31:36,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 23:31:36,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 23:31:36,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 23:31:36,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 23:31:36,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 23:31:36,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 23:31:36,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 23:31:36,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 23:31:36,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 23:31:36,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 23:31:36,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 23:31:36,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 23:31:36,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 23:31:36,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 23:31:36,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 23:31:36,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-15 23:31:36,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 23:31:36,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 23:31:36,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 23:31:36,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 23:31:36,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 23:31:36,808 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 23:31:36,809 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-15 23:31:36,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d0d7586/1bb7c884c3f54521935e01383fdace04/FLAGc4f3280a3 [2020-10-15 23:31:37,487 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 23:31:37,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-10-15 23:31:37,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d0d7586/1bb7c884c3f54521935e01383fdace04/FLAGc4f3280a3 [2020-10-15 23:31:37,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d0d7586/1bb7c884c3f54521935e01383fdace04 [2020-10-15 23:31:37,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 23:31:37,721 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 23:31:37,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 23:31:37,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 23:31:37,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 23:31:37,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:37,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63455dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37, skipping insertion in model container [2020-10-15 23:31:37,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:37,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 23:31:37,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 23:31:38,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 23:31:38,430 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 23:31:38,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 23:31:38,630 INFO L208 MainTranslator]: Completed translation [2020-10-15 23:31:38,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38 WrapperNode [2020-10-15 23:31:38,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 23:31:38,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 23:31:38,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 23:31:38,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 23:31:38,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 23:31:38,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 23:31:38,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 23:31:38,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 23:31:38,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (1/1) ... [2020-10-15 23:31:38,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 23:31:38,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 23:31:38,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 23:31:38,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 23:31:38,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (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 [2020-10-15 23:31:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 23:31:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 23:31:38,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 23:31:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-15 23:31:38,798 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-15 23:31:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 23:31:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-15 23:31:38,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 23:31:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 23:31:38,800 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 23:31:39,270 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 23:31:39,270 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-15 23:31:39,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:31:39 BoogieIcfgContainer [2020-10-15 23:31:39,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 23:31:39,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 23:31:39,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 23:31:39,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 23:31:39,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 11:31:37" (1/3) ... [2020-10-15 23:31:39,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6929a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:31:39, skipping insertion in model container [2020-10-15 23:31:39,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:38" (2/3) ... [2020-10-15 23:31:39,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6929a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:31:39, skipping insertion in model container [2020-10-15 23:31:39,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:31:39" (3/3) ... [2020-10-15 23:31:39,285 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-15 23:31:39,298 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 23:31:39,306 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 23:31:39,307 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 23:31:39,341 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,341 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,341 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,342 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,342 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,342 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,343 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,343 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,343 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,344 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,344 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,344 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,344 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,345 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,345 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,346 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,346 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,346 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,346 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,347 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,347 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,347 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,347 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,348 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,348 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,348 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,348 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,349 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,349 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,349 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,350 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,350 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,350 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,350 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,351 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,351 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,351 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,351 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,352 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,352 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,352 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,352 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,352 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,353 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,353 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,353 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,353 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,354 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,354 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,354 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,354 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,354 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,355 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,355 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,355 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,355 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,356 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,356 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,356 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,357 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,357 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,357 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,357 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,358 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,358 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,358 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,358 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,359 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,359 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,359 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,359 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,360 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,360 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,360 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,360 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,361 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,361 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,361 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,361 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,362 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,362 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,362 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,362 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,363 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,363 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,363 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,363 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,367 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,368 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,368 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,368 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,369 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,369 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,369 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,369 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,370 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,370 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,370 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,370 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,370 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,371 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,371 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,371 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,371 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,372 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,372 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,372 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,372 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,373 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,373 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,373 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,373 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:39,398 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 23:31:39,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:31:39,420 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-15 23:31:39,420 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:31:39,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:31:39,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:31:39,421 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:31:39,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:31:39,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:31:39,436 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-15 23:31:39,509 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-15 23:31:39,509 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-15 23:31:39,519 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. [2020-10-15 23:31:39,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 105 transitions, 218 flow [2020-10-15 23:31:39,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 100 transitions, 205 flow [2020-10-15 23:31:39,533 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:31:39,535 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 100 transitions, 205 flow [2020-10-15 23:31:39,538 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 100 transitions, 205 flow [2020-10-15 23:31:39,539 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 90 places, 100 transitions, 205 flow [2020-10-15 23:31:39,569 INFO L129 PetriNetUnfolder]: 17/121 cut-off events. [2020-10-15 23:31:39,569 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:39,571 INFO L80 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 121 events. 17/121 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-15 23:31:39,575 INFO L117 LiptonReduction]: Number of co-enabled transitions 2652 [2020-10-15 23:31:41,636 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-15 23:31:41,844 INFO L132 LiptonReduction]: Checked pairs total: 2472 [2020-10-15 23:31:41,845 INFO L134 LiptonReduction]: Total number of compositions: 96 [2020-10-15 23:31:41,848 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2317 [2020-10-15 23:31:41,855 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-10-15 23:31:41,856 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:41,856 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:41,857 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:41,857 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:31:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1681319003, now seen corresponding path program 1 times [2020-10-15 23:31:41,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:41,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000567155] [2020-10-15 23:31:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000567155] [2020-10-15 23:31:42,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:42,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:31:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930066936] [2020-10-15 23:31:42,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:31:42,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:42,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:31:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:31:42,068 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:31:42,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 22 transitions, 49 flow. Second operand 3 states. [2020-10-15 23:31:42,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:42,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:31:42,073 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:42,114 INFO L129 PetriNetUnfolder]: 4/21 cut-off events. [2020-10-15 23:31:42,114 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:42,114 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 21 events. 4/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 25 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 17. Up to 6 conditions per place. [2020-10-15 23:31:42,116 INFO L132 encePairwiseOnDemand]: 194/201 looper letters, 5 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2020-10-15 23:31:42,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 21 transitions, 67 flow [2020-10-15 23:31:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:31:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-15 23:31:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2020-10-15 23:31:42,135 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733001658374793 [2020-10-15 23:31:42,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2020-10-15 23:31:42,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2020-10-15 23:31:42,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:42,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2020-10-15 23:31:42,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-15 23:31:42,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-15 23:31:42,154 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-15 23:31:42,157 INFO L185 Difference]: Start difference. First operand has 19 places, 22 transitions, 49 flow. Second operand 3 states and 406 transitions. [2020-10-15 23:31:42,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 21 transitions, 67 flow [2020-10-15 23:31:42,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 67 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-15 23:31:42,162 INFO L241 Difference]: Finished difference. Result has 20 places, 19 transitions, 60 flow [2020-10-15 23:31:42,165 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2020-10-15 23:31:42,166 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2020-10-15 23:31:42,167 INFO L481 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 60 flow [2020-10-15 23:31:42,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:31:42,167 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:42,167 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:42,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 23:31:42,168 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:31:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:42,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1147062704, now seen corresponding path program 1 times [2020-10-15 23:31:42,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:42,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579603209] [2020-10-15 23:31:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579603209] [2020-10-15 23:31:42,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944468117] [2020-10-15 23:31:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-15 23:31:42,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:42,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-10-15 23:31:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571436312] [2020-10-15 23:31:42,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 23:31:42,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 23:31:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 23:31:42,334 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:31:42,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 60 flow. Second operand 5 states. [2020-10-15 23:31:42,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:42,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:31:42,335 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:42,364 INFO L129 PetriNetUnfolder]: 4/21 cut-off events. [2020-10-15 23:31:42,364 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-15 23:31:42,365 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 21 events. 4/21 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 2/19 useless extension candidates. Maximal degree in co-relation 20. Up to 5 conditions per place. [2020-10-15 23:31:42,365 INFO L132 encePairwiseOnDemand]: 196/201 looper letters, 5 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2020-10-15 23:31:42,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 83 flow [2020-10-15 23:31:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:31:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-15 23:31:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 532 transitions. [2020-10-15 23:31:42,369 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6616915422885572 [2020-10-15 23:31:42,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 532 transitions. [2020-10-15 23:31:42,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 532 transitions. [2020-10-15 23:31:42,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:42,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 532 transitions. [2020-10-15 23:31:42,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-15 23:31:42,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-15 23:31:42,374 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-15 23:31:42,374 INFO L185 Difference]: Start difference. First operand has 20 places, 19 transitions, 60 flow. Second operand 4 states and 532 transitions. [2020-10-15 23:31:42,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 83 flow [2020-10-15 23:31:42,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-15 23:31:42,375 INFO L241 Difference]: Finished difference. Result has 22 places, 19 transitions, 70 flow [2020-10-15 23:31:42,376 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2020-10-15 23:31:42,376 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2020-10-15 23:31:42,377 INFO L481 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 70 flow [2020-10-15 23:31:42,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 23:31:42,377 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:42,377 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:42,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-15 23:31:42,591 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:31:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1764986619, now seen corresponding path program 2 times [2020-10-15 23:31:42,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:42,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611579911] [2020-10-15 23:31:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611579911] [2020-10-15 23:31:42,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846823034] [2020-10-15 23:31:42,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:42,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-15 23:31:42,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:42,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 23:31:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:42,783 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2020-10-15 23:31:42,787 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 23:31:42,815 INFO L625 ElimStorePlain]: treesize reduction 40, result has 24.5 percent of original size [2020-10-15 23:31:42,818 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-15 23:31:42,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:4 [2020-10-15 23:31:42,847 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-15 23:31:42,848 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 23:31:42,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-15 23:31:42,855 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-15 23:31:42,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-15 23:31:42,892 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-10-15 23:31:42,893 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 23:31:42,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-15 23:31:42,903 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-15 23:31:42,904 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-10-15 23:31:42,994 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-10-15 23:31:42,996 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 23:31:43,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-15 23:31:43,002 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-15 23:31:43,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:7 [2020-10-15 23:31:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:31:43,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 23:31:43,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2020-10-15 23:31:43,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301206271] [2020-10-15 23:31:43,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 23:31:43,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 23:31:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:43,020 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 201 [2020-10-15 23:31:43,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 70 flow. Second operand 8 states. [2020-10-15 23:31:43,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:43,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 201 [2020-10-15 23:31:43,021 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:51,159 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-15 23:31:59,258 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-15 23:32:09,842 INFO L129 PetriNetUnfolder]: 55/143 cut-off events. [2020-10-15 23:32:09,842 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2020-10-15 23:32:09,845 INFO L80 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 143 events. 55/143 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 551 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 248. Up to 31 conditions per place. [2020-10-15 23:32:09,849 INFO L132 encePairwiseOnDemand]: 192/201 looper letters, 44 selfloop transitions, 20 changer transitions 0/67 dead transitions. [2020-10-15 23:32:09,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 67 transitions, 304 flow [2020-10-15 23:32:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 23:32:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-15 23:32:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 967 transitions. [2020-10-15 23:32:09,857 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.4009121061359867 [2020-10-15 23:32:09,857 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 967 transitions. [2020-10-15 23:32:09,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 967 transitions. [2020-10-15 23:32:09,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:09,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 967 transitions. [2020-10-15 23:32:09,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-15 23:32:09,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-15 23:32:09,866 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-15 23:32:09,866 INFO L185 Difference]: Start difference. First operand has 22 places, 19 transitions, 70 flow. Second operand 12 states and 967 transitions. [2020-10-15 23:32:09,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 67 transitions, 304 flow [2020-10-15 23:32:09,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 67 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-15 23:32:09,870 INFO L241 Difference]: Finished difference. Result has 41 places, 37 transitions, 211 flow [2020-10-15 23:32:09,871 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2020-10-15 23:32:09,871 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 22 predicate places. [2020-10-15 23:32:09,871 INFO L481 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 211 flow [2020-10-15 23:32:09,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 23:32:09,871 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:09,872 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:10,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,086 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:10,087 INFO L82 PathProgramCache]: Analyzing trace with hash 358947280, now seen corresponding path program 1 times [2020-10-15 23:32:10,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:10,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710283917] [2020-10-15 23:32:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:10,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710283917] [2020-10-15 23:32:10,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345607519] [2020-10-15 23:32:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 23:32:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:10,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:10,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-15 23:32:10,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67892052] [2020-10-15 23:32:10,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 23:32:10,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 23:32:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:32:10,238 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:10,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 211 flow. Second operand 6 states. [2020-10-15 23:32:10,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:10,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:10,239 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:10,279 INFO L129 PetriNetUnfolder]: 35/107 cut-off events. [2020-10-15 23:32:10,279 INFO L130 PetriNetUnfolder]: For 96/100 co-relation queries the response was YES. [2020-10-15 23:32:10,280 INFO L80 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 107 events. 35/107 cut-off events. For 96/100 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 362 event pairs, 0 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 212. Up to 24 conditions per place. [2020-10-15 23:32:10,281 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 9 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2020-10-15 23:32:10,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 257 flow [2020-10-15 23:32:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 23:32:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-15 23:32:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2020-10-15 23:32:10,284 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6587064676616915 [2020-10-15 23:32:10,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2020-10-15 23:32:10,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2020-10-15 23:32:10,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:10,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2020-10-15 23:32:10,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-15 23:32:10,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-15 23:32:10,289 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-15 23:32:10,289 INFO L185 Difference]: Start difference. First operand has 41 places, 37 transitions, 211 flow. Second operand 5 states and 662 transitions. [2020-10-15 23:32:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 257 flow [2020-10-15 23:32:10,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-15 23:32:10,294 INFO L241 Difference]: Finished difference. Result has 45 places, 38 transitions, 236 flow [2020-10-15 23:32:10,294 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2020-10-15 23:32:10,295 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 26 predicate places. [2020-10-15 23:32:10,295 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 236 flow [2020-10-15 23:32:10,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 23:32:10,295 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:10,295 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:10,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,508 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash 17432994, now seen corresponding path program 1 times [2020-10-15 23:32:10,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:10,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637476685] [2020-10-15 23:32:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:32:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637476685] [2020-10-15 23:32:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924890453] [2020-10-15 23:32:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 23:32:10,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:32:10,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:10,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 23:32:10,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859169635] [2020-10-15 23:32:10,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 23:32:10,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 23:32:10,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 23:32:10,660 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:10,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 236 flow. Second operand 7 states. [2020-10-15 23:32:10,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:10,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:10,661 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:10,708 INFO L129 PetriNetUnfolder]: 35/108 cut-off events. [2020-10-15 23:32:10,708 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2020-10-15 23:32:10,709 INFO L80 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 108 events. 35/108 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 362 event pairs, 0 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 241. Up to 24 conditions per place. [2020-10-15 23:32:10,710 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 9 selfloop transitions, 9 changer transitions 0/40 dead transitions. [2020-10-15 23:32:10,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 286 flow [2020-10-15 23:32:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 23:32:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-15 23:32:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 793 transitions. [2020-10-15 23:32:10,714 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6575456053067993 [2020-10-15 23:32:10,715 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 793 transitions. [2020-10-15 23:32:10,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 793 transitions. [2020-10-15 23:32:10,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:10,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 793 transitions. [2020-10-15 23:32:10,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-15 23:32:10,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-15 23:32:10,720 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-15 23:32:10,720 INFO L185 Difference]: Start difference. First operand has 45 places, 38 transitions, 236 flow. Second operand 6 states and 793 transitions. [2020-10-15 23:32:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 286 flow [2020-10-15 23:32:10,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 266 flow, removed 3 selfloop flow, removed 3 redundant places. [2020-10-15 23:32:10,728 INFO L241 Difference]: Finished difference. Result has 48 places, 39 transitions, 246 flow [2020-10-15 23:32:10,729 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2020-10-15 23:32:10,729 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 29 predicate places. [2020-10-15 23:32:10,729 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 246 flow [2020-10-15 23:32:10,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 23:32:10,729 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:10,729 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:10,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,945 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1979786793, now seen corresponding path program 2 times [2020-10-15 23:32:10,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:10,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966500170] [2020-10-15 23:32:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:32:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966500170] [2020-10-15 23:32:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778542818] [2020-10-15 23:32:11,005 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 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 [2020-10-15 23:32:11,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 23:32:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:32:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:11,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 23:32:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504378538] [2020-10-15 23:32:11,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 23:32:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 23:32:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 23:32:11,100 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:11,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 246 flow. Second operand 8 states. [2020-10-15 23:32:11,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:11,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:11,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:11,143 INFO L129 PetriNetUnfolder]: 35/109 cut-off events. [2020-10-15 23:32:11,143 INFO L130 PetriNetUnfolder]: For 113/117 co-relation queries the response was YES. [2020-10-15 23:32:11,144 INFO L80 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 109 events. 35/109 cut-off events. For 113/117 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 362 event pairs, 0 based on Foata normal form. 2/93 useless extension candidates. Maximal degree in co-relation 241. Up to 24 conditions per place. [2020-10-15 23:32:11,145 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 9 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2020-10-15 23:32:11,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 300 flow [2020-10-15 23:32:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 23:32:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-15 23:32:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 924 transitions. [2020-10-15 23:32:11,150 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6567164179104478 [2020-10-15 23:32:11,150 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 924 transitions. [2020-10-15 23:32:11,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 924 transitions. [2020-10-15 23:32:11,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:11,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 924 transitions. [2020-10-15 23:32:11,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-15 23:32:11,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-15 23:32:11,157 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-15 23:32:11,157 INFO L185 Difference]: Start difference. First operand has 48 places, 39 transitions, 246 flow. Second operand 7 states and 924 transitions. [2020-10-15 23:32:11,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 300 flow [2020-10-15 23:32:11,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 276 flow, removed 4 selfloop flow, removed 4 redundant places. [2020-10-15 23:32:11,161 INFO L241 Difference]: Finished difference. Result has 51 places, 40 transitions, 256 flow [2020-10-15 23:32:11,161 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2020-10-15 23:32:11,162 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 32 predicate places. [2020-10-15 23:32:11,162 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 256 flow [2020-10-15 23:32:11,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 23:32:11,162 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:11,163 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:11,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 23:32:11,377 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:11,378 INFO L82 PathProgramCache]: Analyzing trace with hash 530909250, now seen corresponding path program 3 times [2020-10-15 23:32:11,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:11,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707777774] [2020-10-15 23:32:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:32:11,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707777774] [2020-10-15 23:32:11,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314294030] [2020-10-15 23:32:11,457 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:11,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:32:11,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 23:32:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:11,570 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-15 23:32:11,571 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 23:32:11,605 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-15 23:32:11,606 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-15 23:32:11,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2020-10-15 23:32:11,621 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-15 23:32:11,622 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 23:32:11,627 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-15 23:32:11,627 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-15 23:32:11,628 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-15 23:32:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 23:32:11,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 23:32:11,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2020-10-15 23:32:11,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349742469] [2020-10-15 23:32:11,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 23:32:11,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:11,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 23:32:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:11,644 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 201 [2020-10-15 23:32:11,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 256 flow. Second operand 7 states. [2020-10-15 23:32:11,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:11,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 201 [2020-10-15 23:32:11,645 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:11,828 INFO L129 PetriNetUnfolder]: 61/156 cut-off events. [2020-10-15 23:32:11,828 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2020-10-15 23:32:11,829 INFO L80 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 156 events. 61/156 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 581 event pairs, 3 based on Foata normal form. 4/134 useless extension candidates. Maximal degree in co-relation 448. Up to 59 conditions per place. [2020-10-15 23:32:11,830 INFO L132 encePairwiseOnDemand]: 193/201 looper letters, 49 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2020-10-15 23:32:11,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 484 flow [2020-10-15 23:32:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 23:32:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-15 23:32:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 651 transitions. [2020-10-15 23:32:11,834 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.4048507462686567 [2020-10-15 23:32:11,834 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 651 transitions. [2020-10-15 23:32:11,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 651 transitions. [2020-10-15 23:32:11,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:11,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 651 transitions. [2020-10-15 23:32:11,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-15 23:32:11,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-15 23:32:11,840 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-15 23:32:11,840 INFO L185 Difference]: Start difference. First operand has 51 places, 40 transitions, 256 flow. Second operand 8 states and 651 transitions. [2020-10-15 23:32:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 484 flow [2020-10-15 23:32:11,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 456 flow, removed 5 selfloop flow, removed 5 redundant places. [2020-10-15 23:32:11,845 INFO L241 Difference]: Finished difference. Result has 56 places, 45 transitions, 309 flow [2020-10-15 23:32:11,845 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=309, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2020-10-15 23:32:11,846 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 37 predicate places. [2020-10-15 23:32:11,846 INFO L481 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 309 flow [2020-10-15 23:32:11,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 23:32:11,846 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:11,846 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:12,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:12,060 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash 530902427, now seen corresponding path program 2 times [2020-10-15 23:32:12,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:12,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514728422] [2020-10-15 23:32:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:12,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514728422] [2020-10-15 23:32:12,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333958597] [2020-10-15 23:32:12,132 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:12,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:12,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:12,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 23:32:12,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:12,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:12,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 23:32:12,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385240332] [2020-10-15 23:32:12,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 23:32:12,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 23:32:12,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 23:32:12,216 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:12,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 309 flow. Second operand 9 states. [2020-10-15 23:32:12,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:12,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:12,218 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:12,262 INFO L129 PetriNetUnfolder]: 39/125 cut-off events. [2020-10-15 23:32:12,262 INFO L130 PetriNetUnfolder]: For 178/182 co-relation queries the response was YES. [2020-10-15 23:32:12,263 INFO L80 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 125 events. 39/125 cut-off events. For 178/182 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 450 event pairs, 0 based on Foata normal form. 3/106 useless extension candidates. Maximal degree in co-relation 295. Up to 28 conditions per place. [2020-10-15 23:32:12,264 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2020-10-15 23:32:12,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 46 transitions, 363 flow [2020-10-15 23:32:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 23:32:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-15 23:32:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2020-10-15 23:32:12,268 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6560945273631841 [2020-10-15 23:32:12,269 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2020-10-15 23:32:12,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2020-10-15 23:32:12,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:12,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2020-10-15 23:32:12,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-15 23:32:12,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-15 23:32:12,276 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-15 23:32:12,276 INFO L185 Difference]: Start difference. First operand has 56 places, 45 transitions, 309 flow. Second operand 8 states and 1055 transitions. [2020-10-15 23:32:12,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 46 transitions, 363 flow [2020-10-15 23:32:12,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 353 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-15 23:32:12,281 INFO L241 Difference]: Finished difference. Result has 61 places, 46 transitions, 337 flow [2020-10-15 23:32:12,281 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2020-10-15 23:32:12,281 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 42 predicate places. [2020-10-15 23:32:12,281 INFO L481 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 337 flow [2020-10-15 23:32:12,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 23:32:12,282 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:12,282 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:12,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:12,484 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1053068432, now seen corresponding path program 3 times [2020-10-15 23:32:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:12,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677509779] [2020-10-15 23:32:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677509779] [2020-10-15 23:32:12,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540868614] [2020-10-15 23:32:12,547 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 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 [2020-10-15 23:32:12,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 23:32:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:32:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:12,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:12,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 23:32:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340476703] [2020-10-15 23:32:12,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 23:32:12,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 23:32:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 23:32:12,641 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:12,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 337 flow. Second operand 10 states. [2020-10-15 23:32:12,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:12,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:12,642 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:12,684 INFO L129 PetriNetUnfolder]: 37/120 cut-off events. [2020-10-15 23:32:12,684 INFO L130 PetriNetUnfolder]: For 169/174 co-relation queries the response was YES. [2020-10-15 23:32:12,685 INFO L80 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 120 events. 37/120 cut-off events. For 169/174 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/104 useless extension candidates. Maximal degree in co-relation 288. Up to 27 conditions per place. [2020-10-15 23:32:12,686 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2020-10-15 23:32:12,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 395 flow [2020-10-15 23:32:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:32:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:32:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1186 transitions. [2020-10-15 23:32:12,691 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6556108347153123 [2020-10-15 23:32:12,691 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1186 transitions. [2020-10-15 23:32:12,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1186 transitions. [2020-10-15 23:32:12,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:12,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1186 transitions. [2020-10-15 23:32:12,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:32:12,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:32:12,698 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:32:12,698 INFO L185 Difference]: Start difference. First operand has 61 places, 46 transitions, 337 flow. Second operand 9 states and 1186 transitions. [2020-10-15 23:32:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 395 flow [2020-10-15 23:32:12,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 47 transitions, 363 flow, removed 6 selfloop flow, removed 6 redundant places. [2020-10-15 23:32:12,702 INFO L241 Difference]: Finished difference. Result has 64 places, 47 transitions, 347 flow [2020-10-15 23:32:12,703 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2020-10-15 23:32:12,703 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2020-10-15 23:32:12,703 INFO L481 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 347 flow [2020-10-15 23:32:12,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 23:32:12,703 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:12,704 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:12,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-15 23:32:12,918 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash 60345403, now seen corresponding path program 4 times [2020-10-15 23:32:12,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:12,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905190098] [2020-10-15 23:32:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:12,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905190098] [2020-10-15 23:32:12,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502984042] [2020-10-15 23:32:12,991 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:13,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:13,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:13,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 23:32:13,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018521800] [2020-10-15 23:32:13,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:32:13,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:13,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:32:13,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:32:13,082 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:13,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 347 flow. Second operand 11 states. [2020-10-15 23:32:13,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:13,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:13,083 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:13,130 INFO L129 PetriNetUnfolder]: 39/127 cut-off events. [2020-10-15 23:32:13,130 INFO L130 PetriNetUnfolder]: For 184/188 co-relation queries the response was YES. [2020-10-15 23:32:13,131 INFO L80 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 127 events. 39/127 cut-off events. For 184/188 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/108 useless extension candidates. Maximal degree in co-relation 301. Up to 28 conditions per place. [2020-10-15 23:32:13,132 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2020-10-15 23:32:13,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 48 transitions, 409 flow [2020-10-15 23:32:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 23:32:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-15 23:32:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1317 transitions. [2020-10-15 23:32:13,137 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.655223880597015 [2020-10-15 23:32:13,137 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1317 transitions. [2020-10-15 23:32:13,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1317 transitions. [2020-10-15 23:32:13,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:13,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1317 transitions. [2020-10-15 23:32:13,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-15 23:32:13,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-15 23:32:13,145 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-15 23:32:13,145 INFO L185 Difference]: Start difference. First operand has 64 places, 47 transitions, 347 flow. Second operand 10 states and 1317 transitions. [2020-10-15 23:32:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 48 transitions, 409 flow [2020-10-15 23:32:13,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 48 transitions, 373 flow, removed 7 selfloop flow, removed 7 redundant places. [2020-10-15 23:32:13,149 INFO L241 Difference]: Finished difference. Result has 67 places, 48 transitions, 357 flow [2020-10-15 23:32:13,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=357, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2020-10-15 23:32:13,150 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 48 predicate places. [2020-10-15 23:32:13,150 INFO L481 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 357 flow [2020-10-15 23:32:13,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:32:13,150 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:13,151 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:13,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:13,366 INFO L429 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash -649297424, now seen corresponding path program 5 times [2020-10-15 23:32:13,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:13,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215687684] [2020-10-15 23:32:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:13,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215687684] [2020-10-15 23:32:13,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574377534] [2020-10-15 23:32:13,453 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:13,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 23:32:13,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:13,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:13,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:13,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 23:32:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486541595] [2020-10-15 23:32:13,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 23:32:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 23:32:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 23:32:13,543 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:13,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 357 flow. Second operand 12 states. [2020-10-15 23:32:13,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:13,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:13,544 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:13,621 INFO L129 PetriNetUnfolder]: 37/122 cut-off events. [2020-10-15 23:32:13,622 INFO L130 PetriNetUnfolder]: For 180/185 co-relation queries the response was YES. [2020-10-15 23:32:13,623 INFO L80 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 122 events. 37/122 cut-off events. For 180/185 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/106 useless extension candidates. Maximal degree in co-relation 288. Up to 27 conditions per place. [2020-10-15 23:32:13,623 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2020-10-15 23:32:13,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 49 transitions, 423 flow [2020-10-15 23:32:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:32:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:32:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1448 transitions. [2020-10-15 23:32:13,629 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6549072817729534 [2020-10-15 23:32:13,633 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1448 transitions. [2020-10-15 23:32:13,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1448 transitions. [2020-10-15 23:32:13,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:13,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1448 transitions. [2020-10-15 23:32:13,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:32:13,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:32:13,642 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:32:13,642 INFO L185 Difference]: Start difference. First operand has 67 places, 48 transitions, 357 flow. Second operand 11 states and 1448 transitions. [2020-10-15 23:32:13,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 49 transitions, 423 flow [2020-10-15 23:32:13,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 49 transitions, 383 flow, removed 8 selfloop flow, removed 8 redundant places. [2020-10-15 23:32:13,646 INFO L241 Difference]: Finished difference. Result has 70 places, 49 transitions, 367 flow [2020-10-15 23:32:13,647 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=367, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2020-10-15 23:32:13,647 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2020-10-15 23:32:13,647 INFO L481 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 367 flow [2020-10-15 23:32:13,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 23:32:13,647 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:13,647 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:13,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:13,862 INFO L429 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1173388581, now seen corresponding path program 6 times [2020-10-15 23:32:13,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:13,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291138220] [2020-10-15 23:32:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:13,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291138220] [2020-10-15 23:32:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529731755] [2020-10-15 23:32:13,955 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 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 [2020-10-15 23:32:14,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 23:32:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:32:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:14,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:14,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 23:32:14,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120761138] [2020-10-15 23:32:14,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:14,073 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:14,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 367 flow. Second operand 13 states. [2020-10-15 23:32:14,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:14,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:14,075 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:14,126 INFO L129 PetriNetUnfolder]: 39/129 cut-off events. [2020-10-15 23:32:14,126 INFO L130 PetriNetUnfolder]: For 197/201 co-relation queries the response was YES. [2020-10-15 23:32:14,127 INFO L80 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 129 events. 39/129 cut-off events. For 197/201 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/110 useless extension candidates. Maximal degree in co-relation 315. Up to 28 conditions per place. [2020-10-15 23:32:14,128 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-15 23:32:14,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 50 transitions, 437 flow [2020-10-15 23:32:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 23:32:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-15 23:32:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1579 transitions. [2020-10-15 23:32:14,133 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6546434494195689 [2020-10-15 23:32:14,133 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1579 transitions. [2020-10-15 23:32:14,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1579 transitions. [2020-10-15 23:32:14,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:14,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1579 transitions. [2020-10-15 23:32:14,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-15 23:32:14,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-15 23:32:14,141 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-15 23:32:14,141 INFO L185 Difference]: Start difference. First operand has 70 places, 49 transitions, 367 flow. Second operand 12 states and 1579 transitions. [2020-10-15 23:32:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 50 transitions, 437 flow [2020-10-15 23:32:14,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 50 transitions, 393 flow, removed 9 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:14,146 INFO L241 Difference]: Finished difference. Result has 73 places, 50 transitions, 377 flow [2020-10-15 23:32:14,146 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2020-10-15 23:32:14,147 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 54 predicate places. [2020-10-15 23:32:14,147 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 377 flow [2020-10-15 23:32:14,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:14,147 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:14,147 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:14,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-15 23:32:14,362 INFO L429 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:14,362 INFO L82 PathProgramCache]: Analyzing trace with hash -240345264, now seen corresponding path program 7 times [2020-10-15 23:32:14,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:14,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524282968] [2020-10-15 23:32:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:14,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524282968] [2020-10-15 23:32:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57690108] [2020-10-15 23:32:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 23:32:14,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:14,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:14,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 23:32:14,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259132335] [2020-10-15 23:32:14,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 23:32:14,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 23:32:14,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 23:32:14,552 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:14,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 377 flow. Second operand 14 states. [2020-10-15 23:32:14,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:14,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:14,554 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:14,626 INFO L129 PetriNetUnfolder]: 39/130 cut-off events. [2020-10-15 23:32:14,626 INFO L130 PetriNetUnfolder]: For 205/209 co-relation queries the response was YES. [2020-10-15 23:32:14,627 INFO L80 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 130 events. 39/130 cut-off events. For 205/209 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/111 useless extension candidates. Maximal degree in co-relation 322. Up to 28 conditions per place. [2020-10-15 23:32:14,628 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 16 changer transitions 0/51 dead transitions. [2020-10-15 23:32:14,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 51 transitions, 451 flow [2020-10-15 23:32:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:32:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:32:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1710 transitions. [2020-10-15 23:32:14,637 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6544202066590127 [2020-10-15 23:32:14,637 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1710 transitions. [2020-10-15 23:32:14,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1710 transitions. [2020-10-15 23:32:14,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:14,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1710 transitions. [2020-10-15 23:32:14,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:32:14,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:32:14,648 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:32:14,648 INFO L185 Difference]: Start difference. First operand has 73 places, 50 transitions, 377 flow. Second operand 13 states and 1710 transitions. [2020-10-15 23:32:14,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 51 transitions, 451 flow [2020-10-15 23:32:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 51 transitions, 403 flow, removed 10 selfloop flow, removed 10 redundant places. [2020-10-15 23:32:14,655 INFO L241 Difference]: Finished difference. Result has 76 places, 51 transitions, 387 flow [2020-10-15 23:32:14,656 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=387, PETRI_PLACES=76, PETRI_TRANSITIONS=51} [2020-10-15 23:32:14,656 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 57 predicate places. [2020-10-15 23:32:14,656 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 51 transitions, 387 flow [2020-10-15 23:32:14,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 23:32:14,656 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:14,656 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:14,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 23:32:14,870 INFO L429 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:14,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1380773509, now seen corresponding path program 8 times [2020-10-15 23:32:14,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:14,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550632221] [2020-10-15 23:32:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:14,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550632221] [2020-10-15 23:32:14,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215275356] [2020-10-15 23:32:14,984 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:15,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 23:32:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:15,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:15,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 23:32:15,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692774075] [2020-10-15 23:32:15,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:15,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:15,065 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:15,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 51 transitions, 387 flow. Second operand 15 states. [2020-10-15 23:32:15,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:15,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:15,066 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:15,120 INFO L129 PetriNetUnfolder]: 39/131 cut-off events. [2020-10-15 23:32:15,120 INFO L130 PetriNetUnfolder]: For 214/218 co-relation queries the response was YES. [2020-10-15 23:32:15,121 INFO L80 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 131 events. 39/131 cut-off events. For 214/218 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/112 useless extension candidates. Maximal degree in co-relation 329. Up to 28 conditions per place. [2020-10-15 23:32:15,122 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 17 changer transitions 0/52 dead transitions. [2020-10-15 23:32:15,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 52 transitions, 465 flow [2020-10-15 23:32:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 23:32:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 23:32:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1841 transitions. [2020-10-15 23:32:15,126 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.654228855721393 [2020-10-15 23:32:15,126 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1841 transitions. [2020-10-15 23:32:15,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1841 transitions. [2020-10-15 23:32:15,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:15,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1841 transitions. [2020-10-15 23:32:15,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-15 23:32:15,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-15 23:32:15,133 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-15 23:32:15,133 INFO L185 Difference]: Start difference. First operand has 76 places, 51 transitions, 387 flow. Second operand 14 states and 1841 transitions. [2020-10-15 23:32:15,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 52 transitions, 465 flow [2020-10-15 23:32:15,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 413 flow, removed 11 selfloop flow, removed 11 redundant places. [2020-10-15 23:32:15,138 INFO L241 Difference]: Finished difference. Result has 79 places, 52 transitions, 397 flow [2020-10-15 23:32:15,139 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=397, PETRI_PLACES=79, PETRI_TRANSITIONS=52} [2020-10-15 23:32:15,139 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 60 predicate places. [2020-10-15 23:32:15,139 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 52 transitions, 397 flow [2020-10-15 23:32:15,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:15,139 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:15,139 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:15,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-15 23:32:15,355 INFO L429 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1920656560, now seen corresponding path program 9 times [2020-10-15 23:32:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:15,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882888973] [2020-10-15 23:32:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:15,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882888973] [2020-10-15 23:32:15,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714608605] [2020-10-15 23:32:15,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 23:32:15,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 23:32:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 23:32:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:15,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:15,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 23:32:15,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093148627] [2020-10-15 23:32:15,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 23:32:15,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 23:32:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 23:32:15,772 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:15,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 52 transitions, 397 flow. Second operand 16 states. [2020-10-15 23:32:15,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:15,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:15,775 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:15,852 INFO L129 PetriNetUnfolder]: 37/126 cut-off events. [2020-10-15 23:32:15,852 INFO L130 PetriNetUnfolder]: For 214/219 co-relation queries the response was YES. [2020-10-15 23:32:15,854 INFO L80 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 126 events. 37/126 cut-off events. For 214/219 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/110 useless extension candidates. Maximal degree in co-relation 312. Up to 27 conditions per place. [2020-10-15 23:32:15,856 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 18 changer transitions 0/53 dead transitions. [2020-10-15 23:32:15,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 53 transitions, 479 flow [2020-10-15 23:32:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1972 transitions. [2020-10-15 23:32:15,863 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6540630182421228 [2020-10-15 23:32:15,863 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1972 transitions. [2020-10-15 23:32:15,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1972 transitions. [2020-10-15 23:32:15,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:15,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1972 transitions. [2020-10-15 23:32:15,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:15,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:15,875 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:15,875 INFO L185 Difference]: Start difference. First operand has 79 places, 52 transitions, 397 flow. Second operand 15 states and 1972 transitions. [2020-10-15 23:32:15,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 53 transitions, 479 flow [2020-10-15 23:32:15,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 53 transitions, 423 flow, removed 12 selfloop flow, removed 12 redundant places. [2020-10-15 23:32:15,884 INFO L241 Difference]: Finished difference. Result has 82 places, 53 transitions, 407 flow [2020-10-15 23:32:15,885 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=407, PETRI_PLACES=82, PETRI_TRANSITIONS=53} [2020-10-15 23:32:15,885 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 63 predicate places. [2020-10-15 23:32:15,885 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 53 transitions, 407 flow [2020-10-15 23:32:15,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 23:32:15,886 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:15,886 INFO L255 CegarLoopForPetriNet]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:16,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:16,102 INFO L429 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1185773595, now seen corresponding path program 10 times [2020-10-15 23:32:16,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:16,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773873311] [2020-10-15 23:32:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:16,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773873311] [2020-10-15 23:32:16,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369006294] [2020-10-15 23:32:16,318 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:16,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:16,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 23:32:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:16,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:16,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 23:32:16,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978541516] [2020-10-15 23:32:16,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:32:16,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:32:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:32:16,401 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:16,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 53 transitions, 407 flow. Second operand 17 states. [2020-10-15 23:32:16,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:16,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:16,403 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:16,457 INFO L129 PetriNetUnfolder]: 39/133 cut-off events. [2020-10-15 23:32:16,457 INFO L130 PetriNetUnfolder]: For 235/239 co-relation queries the response was YES. [2020-10-15 23:32:16,458 INFO L80 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 133 events. 39/133 cut-off events. For 235/239 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/114 useless extension candidates. Maximal degree in co-relation 343. Up to 28 conditions per place. [2020-10-15 23:32:16,459 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 19 changer transitions 0/54 dead transitions. [2020-10-15 23:32:16,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 54 transitions, 493 flow [2020-10-15 23:32:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 23:32:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 23:32:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2103 transitions. [2020-10-15 23:32:16,463 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6539179104477612 [2020-10-15 23:32:16,463 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2103 transitions. [2020-10-15 23:32:16,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2103 transitions. [2020-10-15 23:32:16,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:16,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2103 transitions. [2020-10-15 23:32:16,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-15 23:32:16,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-15 23:32:16,471 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-15 23:32:16,471 INFO L185 Difference]: Start difference. First operand has 82 places, 53 transitions, 407 flow. Second operand 16 states and 2103 transitions. [2020-10-15 23:32:16,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 54 transitions, 493 flow [2020-10-15 23:32:16,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 54 transitions, 433 flow, removed 13 selfloop flow, removed 13 redundant places. [2020-10-15 23:32:16,478 INFO L241 Difference]: Finished difference. Result has 85 places, 54 transitions, 417 flow [2020-10-15 23:32:16,478 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=417, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2020-10-15 23:32:16,478 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 66 predicate places. [2020-10-15 23:32:16,478 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 417 flow [2020-10-15 23:32:16,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:32:16,479 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:16,479 INFO L255 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:16,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 23:32:16,692 INFO L429 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash -120761840, now seen corresponding path program 11 times [2020-10-15 23:32:16,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:16,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414792120] [2020-10-15 23:32:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414792120] [2020-10-15 23:32:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606621875] [2020-10-15 23:32:16,865 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:16,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 23:32:16,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 23:32:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:17,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:17,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 23:32:17,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987735322] [2020-10-15 23:32:17,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 23:32:17,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:17,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 23:32:17,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 23:32:17,015 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:17,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 417 flow. Second operand 18 states. [2020-10-15 23:32:17,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:17,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:17,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:17,075 INFO L129 PetriNetUnfolder]: 39/134 cut-off events. [2020-10-15 23:32:17,075 INFO L130 PetriNetUnfolder]: For 247/251 co-relation queries the response was YES. [2020-10-15 23:32:17,076 INFO L80 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 134 events. 39/134 cut-off events. For 247/251 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/115 useless extension candidates. Maximal degree in co-relation 350. Up to 28 conditions per place. [2020-10-15 23:32:17,077 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 20 changer transitions 0/55 dead transitions. [2020-10-15 23:32:17,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 55 transitions, 507 flow [2020-10-15 23:32:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:32:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:32:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2234 transitions. [2020-10-15 23:32:17,081 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6537898741586187 [2020-10-15 23:32:17,081 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2234 transitions. [2020-10-15 23:32:17,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2234 transitions. [2020-10-15 23:32:17,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:17,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2234 transitions. [2020-10-15 23:32:17,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:32:17,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:32:17,088 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:32:17,088 INFO L185 Difference]: Start difference. First operand has 85 places, 54 transitions, 417 flow. Second operand 17 states and 2234 transitions. [2020-10-15 23:32:17,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 55 transitions, 507 flow [2020-10-15 23:32:17,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 55 transitions, 443 flow, removed 14 selfloop flow, removed 14 redundant places. [2020-10-15 23:32:17,094 INFO L241 Difference]: Finished difference. Result has 88 places, 55 transitions, 427 flow [2020-10-15 23:32:17,094 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=427, PETRI_PLACES=88, PETRI_TRANSITIONS=55} [2020-10-15 23:32:17,094 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 69 predicate places. [2020-10-15 23:32:17,094 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 55 transitions, 427 flow [2020-10-15 23:32:17,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 23:32:17,095 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:17,095 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 23:32:17,309 INFO L429 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1968654661, now seen corresponding path program 12 times [2020-10-15 23:32:17,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:17,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193220114] [2020-10-15 23:32:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193220114] [2020-10-15 23:32:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441344899] [2020-10-15 23:32:17,485 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 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 [2020-10-15 23:32:17,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 23:32:17,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 23:32:17,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:17,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:17,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 23:32:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283233789] [2020-10-15 23:32:17,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 23:32:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 23:32:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 23:32:17,785 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:17,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 55 transitions, 427 flow. Second operand 19 states. [2020-10-15 23:32:17,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:17,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:17,787 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:17,841 INFO L129 PetriNetUnfolder]: 39/135 cut-off events. [2020-10-15 23:32:17,841 INFO L130 PetriNetUnfolder]: For 260/264 co-relation queries the response was YES. [2020-10-15 23:32:17,842 INFO L80 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 135 events. 39/135 cut-off events. For 260/264 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/116 useless extension candidates. Maximal degree in co-relation 357. Up to 28 conditions per place. [2020-10-15 23:32:17,843 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 21 changer transitions 0/56 dead transitions. [2020-10-15 23:32:17,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 56 transitions, 521 flow [2020-10-15 23:32:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 23:32:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 23:32:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2365 transitions. [2020-10-15 23:32:17,847 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6536760641238253 [2020-10-15 23:32:17,847 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2365 transitions. [2020-10-15 23:32:17,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2365 transitions. [2020-10-15 23:32:17,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:17,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2365 transitions. [2020-10-15 23:32:17,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-15 23:32:17,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-15 23:32:17,856 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-15 23:32:17,856 INFO L185 Difference]: Start difference. First operand has 88 places, 55 transitions, 427 flow. Second operand 18 states and 2365 transitions. [2020-10-15 23:32:17,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 56 transitions, 521 flow [2020-10-15 23:32:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 56 transitions, 453 flow, removed 15 selfloop flow, removed 15 redundant places. [2020-10-15 23:32:17,862 INFO L241 Difference]: Finished difference. Result has 91 places, 56 transitions, 437 flow [2020-10-15 23:32:17,862 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=437, PETRI_PLACES=91, PETRI_TRANSITIONS=56} [2020-10-15 23:32:17,863 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 72 predicate places. [2020-10-15 23:32:17,863 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 56 transitions, 437 flow [2020-10-15 23:32:17,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 23:32:17,863 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:17,863 INFO L255 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:18,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 23:32:18,076 INFO L429 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 876210032, now seen corresponding path program 13 times [2020-10-15 23:32:18,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:18,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198342112] [2020-10-15 23:32:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:18,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198342112] [2020-10-15 23:32:18,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303017573] [2020-10-15 23:32:18,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 23:32:18,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:18,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:18,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 23:32:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403277743] [2020-10-15 23:32:18,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 23:32:18,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:18,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 23:32:18,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 23:32:18,359 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:18,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 56 transitions, 437 flow. Second operand 20 states. [2020-10-15 23:32:18,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:18,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:18,361 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:18,445 INFO L129 PetriNetUnfolder]: 37/130 cut-off events. [2020-10-15 23:32:18,445 INFO L130 PetriNetUnfolder]: For 264/269 co-relation queries the response was YES. [2020-10-15 23:32:18,446 INFO L80 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 130 events. 37/130 cut-off events. For 264/269 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/114 useless extension candidates. Maximal degree in co-relation 340. Up to 27 conditions per place. [2020-10-15 23:32:18,447 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 22 changer transitions 0/57 dead transitions. [2020-10-15 23:32:18,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 57 transitions, 535 flow [2020-10-15 23:32:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 23:32:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 23:32:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2496 transitions. [2020-10-15 23:32:18,451 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6535742340926944 [2020-10-15 23:32:18,452 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2496 transitions. [2020-10-15 23:32:18,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2496 transitions. [2020-10-15 23:32:18,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:18,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2496 transitions. [2020-10-15 23:32:18,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-15 23:32:18,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-15 23:32:18,461 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-15 23:32:18,461 INFO L185 Difference]: Start difference. First operand has 91 places, 56 transitions, 437 flow. Second operand 19 states and 2496 transitions. [2020-10-15 23:32:18,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 57 transitions, 535 flow [2020-10-15 23:32:18,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 57 transitions, 463 flow, removed 16 selfloop flow, removed 16 redundant places. [2020-10-15 23:32:18,470 INFO L241 Difference]: Finished difference. Result has 94 places, 57 transitions, 447 flow [2020-10-15 23:32:18,470 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=447, PETRI_PLACES=94, PETRI_TRANSITIONS=57} [2020-10-15 23:32:18,470 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 75 predicate places. [2020-10-15 23:32:18,470 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 57 transitions, 447 flow [2020-10-15 23:32:18,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 23:32:18,471 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:18,471 INFO L255 CegarLoopForPetriNet]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:18,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:18,684 INFO L429 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1127297701, now seen corresponding path program 14 times [2020-10-15 23:32:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:18,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122004764] [2020-10-15 23:32:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:18,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122004764] [2020-10-15 23:32:18,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804509886] [2020-10-15 23:32:18,891 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:18,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 23:32:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:18,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:18,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 23:32:18,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598657100] [2020-10-15 23:32:18,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 23:32:18,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 23:32:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 23:32:18,981 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:18,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 57 transitions, 447 flow. Second operand 21 states. [2020-10-15 23:32:18,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:18,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:18,983 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:19,043 INFO L129 PetriNetUnfolder]: 39/137 cut-off events. [2020-10-15 23:32:19,043 INFO L130 PetriNetUnfolder]: For 289/293 co-relation queries the response was YES. [2020-10-15 23:32:19,044 INFO L80 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 137 events. 39/137 cut-off events. For 289/293 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/118 useless extension candidates. Maximal degree in co-relation 371. Up to 28 conditions per place. [2020-10-15 23:32:19,045 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 23 changer transitions 0/58 dead transitions. [2020-10-15 23:32:19,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 58 transitions, 549 flow [2020-10-15 23:32:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 23:32:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 23:32:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2627 transitions. [2020-10-15 23:32:19,049 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6534825870646767 [2020-10-15 23:32:19,049 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2627 transitions. [2020-10-15 23:32:19,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2627 transitions. [2020-10-15 23:32:19,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:19,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2627 transitions. [2020-10-15 23:32:19,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-15 23:32:19,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-15 23:32:19,057 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-15 23:32:19,057 INFO L185 Difference]: Start difference. First operand has 94 places, 57 transitions, 447 flow. Second operand 20 states and 2627 transitions. [2020-10-15 23:32:19,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 58 transitions, 549 flow [2020-10-15 23:32:19,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 58 transitions, 473 flow, removed 17 selfloop flow, removed 17 redundant places. [2020-10-15 23:32:19,065 INFO L241 Difference]: Finished difference. Result has 97 places, 58 transitions, 457 flow [2020-10-15 23:32:19,065 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=457, PETRI_PLACES=97, PETRI_TRANSITIONS=58} [2020-10-15 23:32:19,065 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 78 predicate places. [2020-10-15 23:32:19,065 INFO L481 AbstractCegarLoop]: Abstraction has has 97 places, 58 transitions, 457 flow [2020-10-15 23:32:19,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 23:32:19,066 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:19,066 INFO L255 CegarLoopForPetriNet]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:19,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:19,280 INFO L429 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1188472016, now seen corresponding path program 15 times [2020-10-15 23:32:19,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:19,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281524599] [2020-10-15 23:32:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281524599] [2020-10-15 23:32:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944018254] [2020-10-15 23:32:19,516 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:20,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 23:32:20,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 23:32:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:20,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:20,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 23:32:20,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720556688] [2020-10-15 23:32:20,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 23:32:20,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 23:32:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 23:32:20,517 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:20,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 58 transitions, 457 flow. Second operand 22 states. [2020-10-15 23:32:20,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:20,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:20,520 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:20,579 INFO L129 PetriNetUnfolder]: 39/138 cut-off events. [2020-10-15 23:32:20,579 INFO L130 PetriNetUnfolder]: For 305/309 co-relation queries the response was YES. [2020-10-15 23:32:20,580 INFO L80 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 138 events. 39/138 cut-off events. For 305/309 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/119 useless extension candidates. Maximal degree in co-relation 378. Up to 28 conditions per place. [2020-10-15 23:32:20,582 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 24 changer transitions 0/59 dead transitions. [2020-10-15 23:32:20,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 59 transitions, 563 flow [2020-10-15 23:32:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 23:32:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 23:32:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2758 transitions. [2020-10-15 23:32:20,588 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6533996683250415 [2020-10-15 23:32:20,588 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2758 transitions. [2020-10-15 23:32:20,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2758 transitions. [2020-10-15 23:32:20,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:20,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2758 transitions. [2020-10-15 23:32:20,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-15 23:32:20,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-15 23:32:20,598 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-15 23:32:20,599 INFO L185 Difference]: Start difference. First operand has 97 places, 58 transitions, 457 flow. Second operand 21 states and 2758 transitions. [2020-10-15 23:32:20,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 59 transitions, 563 flow [2020-10-15 23:32:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 59 transitions, 483 flow, removed 18 selfloop flow, removed 18 redundant places. [2020-10-15 23:32:20,605 INFO L241 Difference]: Finished difference. Result has 100 places, 59 transitions, 467 flow [2020-10-15 23:32:20,606 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=467, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2020-10-15 23:32:20,606 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 81 predicate places. [2020-10-15 23:32:20,606 INFO L481 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 467 flow [2020-10-15 23:32:20,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 23:32:20,606 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:20,606 INFO L255 CegarLoopForPetriNet]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:20,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 23:32:20,821 INFO L429 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -37110789, now seen corresponding path program 16 times [2020-10-15 23:32:20,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:20,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036005285] [2020-10-15 23:32:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:21,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036005285] [2020-10-15 23:32:21,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934663250] [2020-10-15 23:32:21,114 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:21,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:21,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 23:32:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:21,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:21,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 23:32:21,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65204361] [2020-10-15 23:32:21,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 23:32:21,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 23:32:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 23:32:21,238 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:21,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 467 flow. Second operand 23 states. [2020-10-15 23:32:21,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:21,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:21,241 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:21,330 INFO L129 PetriNetUnfolder]: 39/139 cut-off events. [2020-10-15 23:32:21,331 INFO L130 PetriNetUnfolder]: For 322/326 co-relation queries the response was YES. [2020-10-15 23:32:21,332 INFO L80 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 139 events. 39/139 cut-off events. For 322/326 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/120 useless extension candidates. Maximal degree in co-relation 385. Up to 28 conditions per place. [2020-10-15 23:32:21,334 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 25 changer transitions 0/60 dead transitions. [2020-10-15 23:32:21,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 60 transitions, 577 flow [2020-10-15 23:32:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 23:32:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-15 23:32:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2889 transitions. [2020-10-15 23:32:21,353 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6533242876526458 [2020-10-15 23:32:21,353 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2889 transitions. [2020-10-15 23:32:21,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2889 transitions. [2020-10-15 23:32:21,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:21,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2889 transitions. [2020-10-15 23:32:21,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-15 23:32:21,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-15 23:32:21,371 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-15 23:32:21,371 INFO L185 Difference]: Start difference. First operand has 100 places, 59 transitions, 467 flow. Second operand 22 states and 2889 transitions. [2020-10-15 23:32:21,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 60 transitions, 577 flow [2020-10-15 23:32:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 60 transitions, 493 flow, removed 19 selfloop flow, removed 19 redundant places. [2020-10-15 23:32:21,382 INFO L241 Difference]: Finished difference. Result has 103 places, 60 transitions, 477 flow [2020-10-15 23:32:21,382 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=477, PETRI_PLACES=103, PETRI_TRANSITIONS=60} [2020-10-15 23:32:21,383 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 84 predicate places. [2020-10-15 23:32:21,383 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 60 transitions, 477 flow [2020-10-15 23:32:21,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 23:32:21,383 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:21,384 INFO L255 CegarLoopForPetriNet]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:21,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 23:32:21,598 INFO L429 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash 624527920, now seen corresponding path program 17 times [2020-10-15 23:32:21,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:21,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432306195] [2020-10-15 23:32:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:21,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432306195] [2020-10-15 23:32:21,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274344846] [2020-10-15 23:32:21,936 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:22,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 23:32:22,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:22,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 23:32:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:22,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:22,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 23:32:22,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990230113] [2020-10-15 23:32:22,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 23:32:22,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:22,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 23:32:22,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 23:32:22,237 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:22,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 60 transitions, 477 flow. Second operand 24 states. [2020-10-15 23:32:22,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:22,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:22,239 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:22,295 INFO L129 PetriNetUnfolder]: 37/134 cut-off events. [2020-10-15 23:32:22,295 INFO L130 PetriNetUnfolder]: For 330/335 co-relation queries the response was YES. [2020-10-15 23:32:22,296 INFO L80 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 134 events. 37/134 cut-off events. For 330/335 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 368. Up to 27 conditions per place. [2020-10-15 23:32:22,297 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 26 changer transitions 0/61 dead transitions. [2020-10-15 23:32:22,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 61 transitions, 591 flow [2020-10-15 23:32:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:32:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:32:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3020 transitions. [2020-10-15 23:32:22,301 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6532554618213281 [2020-10-15 23:32:22,301 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3020 transitions. [2020-10-15 23:32:22,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3020 transitions. [2020-10-15 23:32:22,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:22,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3020 transitions. [2020-10-15 23:32:22,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:32:22,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:32:22,309 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:32:22,310 INFO L185 Difference]: Start difference. First operand has 103 places, 60 transitions, 477 flow. Second operand 23 states and 3020 transitions. [2020-10-15 23:32:22,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 61 transitions, 591 flow [2020-10-15 23:32:22,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 61 transitions, 503 flow, removed 20 selfloop flow, removed 20 redundant places. [2020-10-15 23:32:22,317 INFO L241 Difference]: Finished difference. Result has 106 places, 61 transitions, 487 flow [2020-10-15 23:32:22,317 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=487, PETRI_PLACES=106, PETRI_TRANSITIONS=61} [2020-10-15 23:32:22,317 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 87 predicate places. [2020-10-15 23:32:22,317 INFO L481 AbstractCegarLoop]: Abstraction has has 106 places, 61 transitions, 487 flow [2020-10-15 23:32:22,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 23:32:22,317 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:22,317 INFO L255 CegarLoopForPetriNet]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:22,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:22,533 INFO L429 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash -339508581, now seen corresponding path program 18 times [2020-10-15 23:32:22,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:22,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489934484] [2020-10-15 23:32:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:22,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489934484] [2020-10-15 23:32:22,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145459889] [2020-10-15 23:32:22,840 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:24,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 23:32:24,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 23:32:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:24,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:24,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 23:32:24,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561145235] [2020-10-15 23:32:24,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 23:32:24,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:24,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 23:32:24,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 23:32:24,179 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:24,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 61 transitions, 487 flow. Second operand 25 states. [2020-10-15 23:32:24,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:24,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:24,180 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:24,247 INFO L129 PetriNetUnfolder]: 39/141 cut-off events. [2020-10-15 23:32:24,248 INFO L130 PetriNetUnfolder]: For 359/363 co-relation queries the response was YES. [2020-10-15 23:32:24,249 INFO L80 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 141 events. 39/141 cut-off events. For 359/363 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/122 useless extension candidates. Maximal degree in co-relation 399. Up to 28 conditions per place. [2020-10-15 23:32:24,250 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 27 changer transitions 0/62 dead transitions. [2020-10-15 23:32:24,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 62 transitions, 605 flow [2020-10-15 23:32:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 23:32:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 23:32:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3151 transitions. [2020-10-15 23:32:24,254 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6531923714759535 [2020-10-15 23:32:24,254 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3151 transitions. [2020-10-15 23:32:24,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3151 transitions. [2020-10-15 23:32:24,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:24,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3151 transitions. [2020-10-15 23:32:24,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-15 23:32:24,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-15 23:32:24,263 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-15 23:32:24,263 INFO L185 Difference]: Start difference. First operand has 106 places, 61 transitions, 487 flow. Second operand 24 states and 3151 transitions. [2020-10-15 23:32:24,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 62 transitions, 605 flow [2020-10-15 23:32:24,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 62 transitions, 513 flow, removed 21 selfloop flow, removed 21 redundant places. [2020-10-15 23:32:24,271 INFO L241 Difference]: Finished difference. Result has 109 places, 62 transitions, 497 flow [2020-10-15 23:32:24,272 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=497, PETRI_PLACES=109, PETRI_TRANSITIONS=62} [2020-10-15 23:32:24,272 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 90 predicate places. [2020-10-15 23:32:24,272 INFO L481 AbstractCegarLoop]: Abstraction has has 109 places, 62 transitions, 497 flow [2020-10-15 23:32:24,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 23:32:24,272 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:24,272 INFO L255 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:24,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 23:32:24,485 INFO L429 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:24,486 INFO L82 PathProgramCache]: Analyzing trace with hash -159869040, now seen corresponding path program 19 times [2020-10-15 23:32:24,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:24,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807921811] [2020-10-15 23:32:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:24,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807921811] [2020-10-15 23:32:24,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558309988] [2020-10-15 23:32:24,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 23:32:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:25,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:25,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 23:32:25,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395644554] [2020-10-15 23:32:25,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 23:32:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 23:32:25,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 23:32:25,052 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:25,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 62 transitions, 497 flow. Second operand 26 states. [2020-10-15 23:32:25,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:25,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:25,055 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:25,149 INFO L129 PetriNetUnfolder]: 39/142 cut-off events. [2020-10-15 23:32:25,149 INFO L130 PetriNetUnfolder]: For 379/383 co-relation queries the response was YES. [2020-10-15 23:32:25,151 INFO L80 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 142 events. 39/142 cut-off events. For 379/383 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/123 useless extension candidates. Maximal degree in co-relation 406. Up to 28 conditions per place. [2020-10-15 23:32:25,152 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 28 changer transitions 0/63 dead transitions. [2020-10-15 23:32:25,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 63 transitions, 619 flow [2020-10-15 23:32:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:32:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:32:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3282 transitions. [2020-10-15 23:32:25,160 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.653134328358209 [2020-10-15 23:32:25,160 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3282 transitions. [2020-10-15 23:32:25,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3282 transitions. [2020-10-15 23:32:25,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:25,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3282 transitions. [2020-10-15 23:32:25,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:32:25,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:32:25,174 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:32:25,174 INFO L185 Difference]: Start difference. First operand has 109 places, 62 transitions, 497 flow. Second operand 25 states and 3282 transitions. [2020-10-15 23:32:25,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 63 transitions, 619 flow [2020-10-15 23:32:25,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 63 transitions, 523 flow, removed 22 selfloop flow, removed 22 redundant places. [2020-10-15 23:32:25,185 INFO L241 Difference]: Finished difference. Result has 112 places, 63 transitions, 507 flow [2020-10-15 23:32:25,185 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=507, PETRI_PLACES=112, PETRI_TRANSITIONS=63} [2020-10-15 23:32:25,186 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 93 predicate places. [2020-10-15 23:32:25,186 INFO L481 AbstractCegarLoop]: Abstraction has has 112 places, 63 transitions, 507 flow [2020-10-15 23:32:25,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 23:32:25,186 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:25,186 INFO L255 CegarLoopForPetriNet]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:25,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:25,399 INFO L429 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:25,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1113989435, now seen corresponding path program 20 times [2020-10-15 23:32:25,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:25,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514731959] [2020-10-15 23:32:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:25,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514731959] [2020-10-15 23:32:25,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395246486] [2020-10-15 23:32:25,788 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:25,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:25,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:25,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 23:32:25,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:25,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:25,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 23:32:25,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973751655] [2020-10-15 23:32:25,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 23:32:25,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 23:32:25,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 23:32:25,870 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:25,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 63 transitions, 507 flow. Second operand 27 states. [2020-10-15 23:32:25,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:25,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:25,872 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:25,944 INFO L129 PetriNetUnfolder]: 39/143 cut-off events. [2020-10-15 23:32:25,944 INFO L130 PetriNetUnfolder]: For 400/404 co-relation queries the response was YES. [2020-10-15 23:32:25,945 INFO L80 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 143 events. 39/143 cut-off events. For 400/404 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/124 useless extension candidates. Maximal degree in co-relation 413. Up to 28 conditions per place. [2020-10-15 23:32:25,946 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 29 changer transitions 0/64 dead transitions. [2020-10-15 23:32:25,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 64 transitions, 633 flow [2020-10-15 23:32:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 23:32:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 23:32:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3413 transitions. [2020-10-15 23:32:25,951 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6530807500956755 [2020-10-15 23:32:25,951 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3413 transitions. [2020-10-15 23:32:25,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3413 transitions. [2020-10-15 23:32:25,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:25,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3413 transitions. [2020-10-15 23:32:25,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-15 23:32:25,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-15 23:32:25,959 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-15 23:32:25,959 INFO L185 Difference]: Start difference. First operand has 112 places, 63 transitions, 507 flow. Second operand 26 states and 3413 transitions. [2020-10-15 23:32:25,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 64 transitions, 633 flow [2020-10-15 23:32:25,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 64 transitions, 533 flow, removed 23 selfloop flow, removed 23 redundant places. [2020-10-15 23:32:25,966 INFO L241 Difference]: Finished difference. Result has 115 places, 64 transitions, 517 flow [2020-10-15 23:32:25,967 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=517, PETRI_PLACES=115, PETRI_TRANSITIONS=64} [2020-10-15 23:32:25,967 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 96 predicate places. [2020-10-15 23:32:25,967 INFO L481 AbstractCegarLoop]: Abstraction has has 115 places, 64 transitions, 517 flow [2020-10-15 23:32:25,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 23:32:25,968 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:25,968 INFO L255 CegarLoopForPetriNet]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:26,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 23:32:26,177 INFO L429 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:26,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1948896496, now seen corresponding path program 21 times [2020-10-15 23:32:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:26,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894308986] [2020-10-15 23:32:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:26,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894308986] [2020-10-15 23:32:26,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272119988] [2020-10-15 23:32:26,547 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:28,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 23:32:28,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:28,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 23:32:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:28,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:28,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 23:32:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037428714] [2020-10-15 23:32:28,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 23:32:28,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 23:32:28,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 23:32:28,859 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:28,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 64 transitions, 517 flow. Second operand 28 states. [2020-10-15 23:32:28,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:28,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:28,861 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:28,928 INFO L129 PetriNetUnfolder]: 37/138 cut-off events. [2020-10-15 23:32:28,928 INFO L130 PetriNetUnfolder]: For 412/417 co-relation queries the response was YES. [2020-10-15 23:32:28,929 INFO L80 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 138 events. 37/138 cut-off events. For 412/417 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/122 useless extension candidates. Maximal degree in co-relation 396. Up to 27 conditions per place. [2020-10-15 23:32:28,930 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 30 changer transitions 0/65 dead transitions. [2020-10-15 23:32:28,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 65 transitions, 647 flow [2020-10-15 23:32:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:32:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:32:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3544 transitions. [2020-10-15 23:32:28,936 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6530311405933297 [2020-10-15 23:32:28,937 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3544 transitions. [2020-10-15 23:32:28,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3544 transitions. [2020-10-15 23:32:28,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:28,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3544 transitions. [2020-10-15 23:32:28,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:32:28,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:32:28,946 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:32:28,946 INFO L185 Difference]: Start difference. First operand has 115 places, 64 transitions, 517 flow. Second operand 27 states and 3544 transitions. [2020-10-15 23:32:28,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 65 transitions, 647 flow [2020-10-15 23:32:28,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 65 transitions, 543 flow, removed 24 selfloop flow, removed 24 redundant places. [2020-10-15 23:32:28,954 INFO L241 Difference]: Finished difference. Result has 118 places, 65 transitions, 527 flow [2020-10-15 23:32:28,954 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=527, PETRI_PLACES=118, PETRI_TRANSITIONS=65} [2020-10-15 23:32:28,954 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 99 predicate places. [2020-10-15 23:32:28,954 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 65 transitions, 527 flow [2020-10-15 23:32:28,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 23:32:28,955 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:28,955 INFO L255 CegarLoopForPetriNet]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:29,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 23:32:29,169 INFO L429 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2061211611, now seen corresponding path program 22 times [2020-10-15 23:32:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771863464] [2020-10-15 23:32:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:29,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771863464] [2020-10-15 23:32:29,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894659916] [2020-10-15 23:32:29,595 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:29,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:29,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 23:32:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:29,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:29,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 23:32:29,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628334385] [2020-10-15 23:32:29,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 23:32:29,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 23:32:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 23:32:29,689 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:29,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 65 transitions, 527 flow. Second operand 29 states. [2020-10-15 23:32:29,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:29,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:29,692 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:29,811 INFO L129 PetriNetUnfolder]: 39/145 cut-off events. [2020-10-15 23:32:29,811 INFO L130 PetriNetUnfolder]: For 445/449 co-relation queries the response was YES. [2020-10-15 23:32:29,812 INFO L80 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 145 events. 39/145 cut-off events. For 445/449 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 427. Up to 28 conditions per place. [2020-10-15 23:32:29,813 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 31 changer transitions 0/66 dead transitions. [2020-10-15 23:32:29,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 66 transitions, 661 flow [2020-10-15 23:32:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 23:32:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 23:32:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3675 transitions. [2020-10-15 23:32:29,817 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6529850746268657 [2020-10-15 23:32:29,818 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3675 transitions. [2020-10-15 23:32:29,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3675 transitions. [2020-10-15 23:32:29,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:29,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3675 transitions. [2020-10-15 23:32:29,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-15 23:32:29,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-15 23:32:29,831 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-15 23:32:29,831 INFO L185 Difference]: Start difference. First operand has 118 places, 65 transitions, 527 flow. Second operand 28 states and 3675 transitions. [2020-10-15 23:32:29,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 66 transitions, 661 flow [2020-10-15 23:32:29,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 66 transitions, 553 flow, removed 25 selfloop flow, removed 25 redundant places. [2020-10-15 23:32:29,839 INFO L241 Difference]: Finished difference. Result has 121 places, 66 transitions, 537 flow [2020-10-15 23:32:29,839 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=537, PETRI_PLACES=121, PETRI_TRANSITIONS=66} [2020-10-15 23:32:29,840 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 102 predicate places. [2020-10-15 23:32:29,840 INFO L481 AbstractCegarLoop]: Abstraction has has 121 places, 66 transitions, 537 flow [2020-10-15 23:32:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 23:32:29,840 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:29,840 INFO L255 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:30,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 23:32:30,054 INFO L429 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1248012880, now seen corresponding path program 23 times [2020-10-15 23:32:30,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:30,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955973639] [2020-10-15 23:32:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:30,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955973639] [2020-10-15 23:32:30,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172018945] [2020-10-15 23:32:30,478 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:30,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 23:32:30,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 23:32:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:30,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:30,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 23:32:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833185674] [2020-10-15 23:32:30,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 23:32:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:30,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 23:32:30,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 23:32:30,971 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:30,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 66 transitions, 537 flow. Second operand 30 states. [2020-10-15 23:32:30,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:30,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:30,973 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:31,066 INFO L129 PetriNetUnfolder]: 39/146 cut-off events. [2020-10-15 23:32:31,066 INFO L130 PetriNetUnfolder]: For 469/473 co-relation queries the response was YES. [2020-10-15 23:32:31,068 INFO L80 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 146 events. 39/146 cut-off events. For 469/473 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/127 useless extension candidates. Maximal degree in co-relation 434. Up to 28 conditions per place. [2020-10-15 23:32:31,069 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 32 changer transitions 0/67 dead transitions. [2020-10-15 23:32:31,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 67 transitions, 675 flow [2020-10-15 23:32:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:32:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:32:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3806 transitions. [2020-10-15 23:32:31,074 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6529421856236061 [2020-10-15 23:32:31,074 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3806 transitions. [2020-10-15 23:32:31,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3806 transitions. [2020-10-15 23:32:31,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:31,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3806 transitions. [2020-10-15 23:32:31,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:32:31,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:32:31,085 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:32:31,085 INFO L185 Difference]: Start difference. First operand has 121 places, 66 transitions, 537 flow. Second operand 29 states and 3806 transitions. [2020-10-15 23:32:31,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 67 transitions, 675 flow [2020-10-15 23:32:31,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 67 transitions, 563 flow, removed 26 selfloop flow, removed 26 redundant places. [2020-10-15 23:32:31,093 INFO L241 Difference]: Finished difference. Result has 124 places, 67 transitions, 547 flow [2020-10-15 23:32:31,093 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=547, PETRI_PLACES=124, PETRI_TRANSITIONS=67} [2020-10-15 23:32:31,095 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 105 predicate places. [2020-10-15 23:32:31,096 INFO L481 AbstractCegarLoop]: Abstraction has has 124 places, 67 transitions, 547 flow [2020-10-15 23:32:31,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 23:32:31,096 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:31,096 INFO L255 CegarLoopForPetriNet]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:31,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 23:32:31,309 INFO L429 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1808655995, now seen corresponding path program 24 times [2020-10-15 23:32:31,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:31,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260553627] [2020-10-15 23:32:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:31,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260553627] [2020-10-15 23:32:31,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377974701] [2020-10-15 23:32:31,839 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:40,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-15 23:32:40,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 23:32:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:40,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:40,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 23:32:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827250168] [2020-10-15 23:32:40,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 23:32:40,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 23:32:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 23:32:40,853 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:40,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 67 transitions, 547 flow. Second operand 31 states. [2020-10-15 23:32:40,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:40,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:40,863 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:40,937 INFO L129 PetriNetUnfolder]: 39/147 cut-off events. [2020-10-15 23:32:40,937 INFO L130 PetriNetUnfolder]: For 494/498 co-relation queries the response was YES. [2020-10-15 23:32:40,939 INFO L80 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 147 events. 39/147 cut-off events. For 494/498 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/128 useless extension candidates. Maximal degree in co-relation 441. Up to 28 conditions per place. [2020-10-15 23:32:40,940 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 33 changer transitions 0/68 dead transitions. [2020-10-15 23:32:40,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 68 transitions, 689 flow [2020-10-15 23:32:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 23:32:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 23:32:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3937 transitions. [2020-10-15 23:32:40,946 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6529021558872306 [2020-10-15 23:32:40,947 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3937 transitions. [2020-10-15 23:32:40,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3937 transitions. [2020-10-15 23:32:40,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:40,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3937 transitions. [2020-10-15 23:32:40,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-15 23:32:40,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-15 23:32:40,966 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-15 23:32:40,966 INFO L185 Difference]: Start difference. First operand has 124 places, 67 transitions, 547 flow. Second operand 30 states and 3937 transitions. [2020-10-15 23:32:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 68 transitions, 689 flow [2020-10-15 23:32:40,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 68 transitions, 573 flow, removed 27 selfloop flow, removed 27 redundant places. [2020-10-15 23:32:40,974 INFO L241 Difference]: Finished difference. Result has 127 places, 68 transitions, 557 flow [2020-10-15 23:32:40,974 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=557, PETRI_PLACES=127, PETRI_TRANSITIONS=68} [2020-10-15 23:32:40,975 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 108 predicate places. [2020-10-15 23:32:40,975 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 68 transitions, 557 flow [2020-10-15 23:32:40,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 23:32:40,975 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:40,975 INFO L255 CegarLoopForPetriNet]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:41,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:41,191 INFO L429 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2008723376, now seen corresponding path program 25 times [2020-10-15 23:32:41,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:41,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246551492] [2020-10-15 23:32:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246551492] [2020-10-15 23:32:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822647270] [2020-10-15 23:32:41,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 23:32:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:41,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:41,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-15 23:32:41,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727370099] [2020-10-15 23:32:41,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 23:32:41,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:41,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 23:32:41,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 23:32:41,949 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:41,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 68 transitions, 557 flow. Second operand 32 states. [2020-10-15 23:32:41,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:41,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:41,952 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:42,041 INFO L129 PetriNetUnfolder]: 37/142 cut-off events. [2020-10-15 23:32:42,041 INFO L130 PetriNetUnfolder]: For 510/515 co-relation queries the response was YES. [2020-10-15 23:32:42,042 INFO L80 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 142 events. 37/142 cut-off events. For 510/515 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 424. Up to 27 conditions per place. [2020-10-15 23:32:42,044 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 34 changer transitions 0/69 dead transitions. [2020-10-15 23:32:42,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 69 transitions, 703 flow [2020-10-15 23:32:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:32:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:32:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4068 transitions. [2020-10-15 23:32:42,049 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6528647087144921 [2020-10-15 23:32:42,049 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4068 transitions. [2020-10-15 23:32:42,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4068 transitions. [2020-10-15 23:32:42,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:42,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4068 transitions. [2020-10-15 23:32:42,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:32:42,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:32:42,060 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:32:42,060 INFO L185 Difference]: Start difference. First operand has 127 places, 68 transitions, 557 flow. Second operand 31 states and 4068 transitions. [2020-10-15 23:32:42,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 69 transitions, 703 flow [2020-10-15 23:32:42,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 69 transitions, 583 flow, removed 28 selfloop flow, removed 28 redundant places. [2020-10-15 23:32:42,071 INFO L241 Difference]: Finished difference. Result has 130 places, 69 transitions, 567 flow [2020-10-15 23:32:42,071 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=567, PETRI_PLACES=130, PETRI_TRANSITIONS=69} [2020-10-15 23:32:42,071 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 111 predicate places. [2020-10-15 23:32:42,071 INFO L481 AbstractCegarLoop]: Abstraction has has 130 places, 69 transitions, 567 flow [2020-10-15 23:32:42,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 23:32:42,072 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:42,072 INFO L255 CegarLoopForPetriNet]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:42,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:42,286 INFO L429 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -379122405, now seen corresponding path program 26 times [2020-10-15 23:32:42,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:42,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741732814] [2020-10-15 23:32:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:42,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741732814] [2020-10-15 23:32:42,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18142813] [2020-10-15 23:32:42,819 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:42,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 23:32:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:42,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:42,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-15 23:32:42,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990677427] [2020-10-15 23:32:42,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 23:32:42,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 23:32:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 23:32:42,924 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:42,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 69 transitions, 567 flow. Second operand 33 states. [2020-10-15 23:32:42,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:42,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:42,926 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:42,989 INFO L129 PetriNetUnfolder]: 39/149 cut-off events. [2020-10-15 23:32:42,990 INFO L130 PetriNetUnfolder]: For 547/551 co-relation queries the response was YES. [2020-10-15 23:32:42,991 INFO L80 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 149 events. 39/149 cut-off events. For 547/551 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/130 useless extension candidates. Maximal degree in co-relation 455. Up to 28 conditions per place. [2020-10-15 23:32:42,993 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 35 changer transitions 0/70 dead transitions. [2020-10-15 23:32:42,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 70 transitions, 717 flow [2020-10-15 23:32:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 23:32:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 23:32:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4199 transitions. [2020-10-15 23:32:42,998 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6528296019900498 [2020-10-15 23:32:42,998 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4199 transitions. [2020-10-15 23:32:42,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4199 transitions. [2020-10-15 23:32:42,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:42,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4199 transitions. [2020-10-15 23:32:43,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-15 23:32:43,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-15 23:32:43,009 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-15 23:32:43,009 INFO L185 Difference]: Start difference. First operand has 130 places, 69 transitions, 567 flow. Second operand 32 states and 4199 transitions. [2020-10-15 23:32:43,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 70 transitions, 717 flow [2020-10-15 23:32:43,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 70 transitions, 593 flow, removed 29 selfloop flow, removed 29 redundant places. [2020-10-15 23:32:43,018 INFO L241 Difference]: Finished difference. Result has 133 places, 70 transitions, 577 flow [2020-10-15 23:32:43,018 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=577, PETRI_PLACES=133, PETRI_TRANSITIONS=70} [2020-10-15 23:32:43,018 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 114 predicate places. [2020-10-15 23:32:43,018 INFO L481 AbstractCegarLoop]: Abstraction has has 133 places, 70 transitions, 577 flow [2020-10-15 23:32:43,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 23:32:43,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:43,018 INFO L255 CegarLoopForPetriNet]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:43,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:43,234 INFO L429 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1387897584, now seen corresponding path program 27 times [2020-10-15 23:32:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:43,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824095183] [2020-10-15 23:32:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824095183] [2020-10-15 23:32:43,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853812512] [2020-10-15 23:32:43,769 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:44,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-15 23:32:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-15 23:32:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:44,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:44,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-15 23:32:44,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989946102] [2020-10-15 23:32:44,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 23:32:44,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 23:32:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 23:32:44,586 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:44,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 70 transitions, 577 flow. Second operand 34 states. [2020-10-15 23:32:44,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:44,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:44,587 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:44,689 INFO L129 PetriNetUnfolder]: 39/150 cut-off events. [2020-10-15 23:32:44,689 INFO L130 PetriNetUnfolder]: For 575/579 co-relation queries the response was YES. [2020-10-15 23:32:44,690 INFO L80 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 150 events. 39/150 cut-off events. For 575/579 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/131 useless extension candidates. Maximal degree in co-relation 462. Up to 28 conditions per place. [2020-10-15 23:32:44,691 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 36 changer transitions 0/71 dead transitions. [2020-10-15 23:32:44,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 71 transitions, 731 flow [2020-10-15 23:32:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 23:32:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 23:32:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4330 transitions. [2020-10-15 23:32:44,696 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6527966229458767 [2020-10-15 23:32:44,696 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4330 transitions. [2020-10-15 23:32:44,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4330 transitions. [2020-10-15 23:32:44,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:44,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4330 transitions. [2020-10-15 23:32:44,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-15 23:32:44,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-15 23:32:44,704 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-15 23:32:44,704 INFO L185 Difference]: Start difference. First operand has 133 places, 70 transitions, 577 flow. Second operand 33 states and 4330 transitions. [2020-10-15 23:32:44,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 71 transitions, 731 flow [2020-10-15 23:32:44,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 71 transitions, 603 flow, removed 30 selfloop flow, removed 30 redundant places. [2020-10-15 23:32:44,714 INFO L241 Difference]: Finished difference. Result has 136 places, 71 transitions, 587 flow [2020-10-15 23:32:44,714 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=587, PETRI_PLACES=136, PETRI_TRANSITIONS=71} [2020-10-15 23:32:44,715 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 117 predicate places. [2020-10-15 23:32:44,715 INFO L481 AbstractCegarLoop]: Abstraction has has 136 places, 71 transitions, 587 flow [2020-10-15 23:32:44,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 23:32:44,715 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:44,715 INFO L255 CegarLoopForPetriNet]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:44,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 23:32:44,930 INFO L429 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1699810235, now seen corresponding path program 28 times [2020-10-15 23:32:44,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:44,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832119137] [2020-10-15 23:32:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:45,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832119137] [2020-10-15 23:32:45,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763743564] [2020-10-15 23:32:45,515 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:45,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-15 23:32:45,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:45,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:45,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-15 23:32:45,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420680312] [2020-10-15 23:32:45,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 23:32:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 23:32:45,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 23:32:45,600 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:45,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 71 transitions, 587 flow. Second operand 35 states. [2020-10-15 23:32:45,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:45,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:45,602 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:45,668 INFO L129 PetriNetUnfolder]: 39/151 cut-off events. [2020-10-15 23:32:45,668 INFO L130 PetriNetUnfolder]: For 604/608 co-relation queries the response was YES. [2020-10-15 23:32:45,669 INFO L80 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 151 events. 39/151 cut-off events. For 604/608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/132 useless extension candidates. Maximal degree in co-relation 469. Up to 28 conditions per place. [2020-10-15 23:32:45,670 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 37 changer transitions 0/72 dead transitions. [2020-10-15 23:32:45,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 72 transitions, 745 flow [2020-10-15 23:32:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 23:32:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 23:32:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4461 transitions. [2020-10-15 23:32:45,675 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6527655838454784 [2020-10-15 23:32:45,675 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4461 transitions. [2020-10-15 23:32:45,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4461 transitions. [2020-10-15 23:32:45,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:45,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4461 transitions. [2020-10-15 23:32:45,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-15 23:32:45,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-15 23:32:45,684 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-15 23:32:45,684 INFO L185 Difference]: Start difference. First operand has 136 places, 71 transitions, 587 flow. Second operand 34 states and 4461 transitions. [2020-10-15 23:32:45,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 72 transitions, 745 flow [2020-10-15 23:32:45,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 72 transitions, 613 flow, removed 31 selfloop flow, removed 31 redundant places. [2020-10-15 23:32:45,695 INFO L241 Difference]: Finished difference. Result has 139 places, 72 transitions, 597 flow [2020-10-15 23:32:45,695 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=597, PETRI_PLACES=139, PETRI_TRANSITIONS=72} [2020-10-15 23:32:45,695 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 120 predicate places. [2020-10-15 23:32:45,695 INFO L481 AbstractCegarLoop]: Abstraction has has 139 places, 72 transitions, 597 flow [2020-10-15 23:32:45,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 23:32:45,696 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:45,696 INFO L255 CegarLoopForPetriNet]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:45,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:45,910 INFO L429 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1365495184, now seen corresponding path program 29 times [2020-10-15 23:32:45,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:45,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255803375] [2020-10-15 23:32:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:46,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255803375] [2020-10-15 23:32:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625753849] [2020-10-15 23:32:46,491 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:48,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-15 23:32:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:48,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-15 23:32:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:48,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:48,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-15 23:32:48,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96669357] [2020-10-15 23:32:48,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 23:32:48,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 23:32:48,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 23:32:48,374 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:32:48,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 72 transitions, 597 flow. Second operand 36 states. [2020-10-15 23:32:48,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:48,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:32:48,376 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:48,443 INFO L129 PetriNetUnfolder]: 37/146 cut-off events. [2020-10-15 23:32:48,444 INFO L130 PetriNetUnfolder]: For 624/629 co-relation queries the response was YES. [2020-10-15 23:32:48,445 INFO L80 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 146 events. 37/146 cut-off events. For 624/629 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/130 useless extension candidates. Maximal degree in co-relation 452. Up to 27 conditions per place. [2020-10-15 23:32:48,446 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 38 changer transitions 0/73 dead transitions. [2020-10-15 23:32:48,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 73 transitions, 759 flow [2020-10-15 23:32:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 23:32:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 23:32:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4592 transitions. [2020-10-15 23:32:48,450 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6527363184079602 [2020-10-15 23:32:48,450 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4592 transitions. [2020-10-15 23:32:48,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4592 transitions. [2020-10-15 23:32:48,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:48,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4592 transitions. [2020-10-15 23:32:48,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-15 23:32:48,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-15 23:32:48,458 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-15 23:32:48,458 INFO L185 Difference]: Start difference. First operand has 139 places, 72 transitions, 597 flow. Second operand 35 states and 4592 transitions. [2020-10-15 23:32:48,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 73 transitions, 759 flow [2020-10-15 23:32:48,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 73 transitions, 623 flow, removed 32 selfloop flow, removed 32 redundant places. [2020-10-15 23:32:48,468 INFO L241 Difference]: Finished difference. Result has 142 places, 73 transitions, 607 flow [2020-10-15 23:32:48,469 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=607, PETRI_PLACES=142, PETRI_TRANSITIONS=73} [2020-10-15 23:32:48,469 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 123 predicate places. [2020-10-15 23:32:48,469 INFO L481 AbstractCegarLoop]: Abstraction has has 142 places, 73 transitions, 607 flow [2020-10-15 23:32:48,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 23:32:48,469 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:48,469 INFO L255 CegarLoopForPetriNet]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:32:48,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 23:32:48,685 INFO L429 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:32:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1900682661, now seen corresponding path program 30 times [2020-10-15 23:32:48,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:48,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820648801] [2020-10-15 23:32:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:32:49,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820648801] [2020-10-15 23:32:49,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19263433] [2020-10-15 23:32:49,328 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-15 23:33:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:03,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-15 23:33:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:03,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:03,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-15 23:33:03,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976889668] [2020-10-15 23:33:03,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 23:33:03,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 23:33:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 23:33:03,286 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:33:03,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 73 transitions, 607 flow. Second operand 37 states. [2020-10-15 23:33:03,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:03,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:33:03,288 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:03,359 INFO L129 PetriNetUnfolder]: 39/153 cut-off events. [2020-10-15 23:33:03,359 INFO L130 PetriNetUnfolder]: For 665/669 co-relation queries the response was YES. [2020-10-15 23:33:03,360 INFO L80 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 153 events. 39/153 cut-off events. For 665/669 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/134 useless extension candidates. Maximal degree in co-relation 483. Up to 28 conditions per place. [2020-10-15 23:33:03,361 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 39 changer transitions 0/74 dead transitions. [2020-10-15 23:33:03,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 74 transitions, 773 flow [2020-10-15 23:33:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 23:33:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 23:33:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4723 transitions. [2020-10-15 23:33:03,367 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6527086788280818 [2020-10-15 23:33:03,367 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4723 transitions. [2020-10-15 23:33:03,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4723 transitions. [2020-10-15 23:33:03,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:03,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4723 transitions. [2020-10-15 23:33:03,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-15 23:33:03,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-15 23:33:03,375 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-15 23:33:03,375 INFO L185 Difference]: Start difference. First operand has 142 places, 73 transitions, 607 flow. Second operand 36 states and 4723 transitions. [2020-10-15 23:33:03,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 74 transitions, 773 flow [2020-10-15 23:33:03,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 74 transitions, 633 flow, removed 33 selfloop flow, removed 33 redundant places. [2020-10-15 23:33:03,386 INFO L241 Difference]: Finished difference. Result has 145 places, 74 transitions, 617 flow [2020-10-15 23:33:03,386 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=617, PETRI_PLACES=145, PETRI_TRANSITIONS=74} [2020-10-15 23:33:03,386 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 126 predicate places. [2020-10-15 23:33:03,387 INFO L481 AbstractCegarLoop]: Abstraction has has 145 places, 74 transitions, 617 flow [2020-10-15 23:33:03,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 23:33:03,387 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:03,387 INFO L255 CegarLoopForPetriNet]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:33:03,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:03,603 INFO L429 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:33:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:03,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1311625264, now seen corresponding path program 31 times [2020-10-15 23:33:03,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:03,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102736674] [2020-10-15 23:33:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102736674] [2020-10-15 23:33:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793073816] [2020-10-15 23:33:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-15 23:33:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:04,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:04,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-15 23:33:04,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372890606] [2020-10-15 23:33:04,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 23:33:04,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 23:33:04,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 23:33:04,394 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:33:04,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 74 transitions, 617 flow. Second operand 38 states. [2020-10-15 23:33:04,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:04,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:33:04,396 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:04,487 INFO L129 PetriNetUnfolder]: 39/154 cut-off events. [2020-10-15 23:33:04,487 INFO L130 PetriNetUnfolder]: For 697/701 co-relation queries the response was YES. [2020-10-15 23:33:04,488 INFO L80 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 154 events. 39/154 cut-off events. For 697/701 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/135 useless extension candidates. Maximal degree in co-relation 490. Up to 28 conditions per place. [2020-10-15 23:33:04,490 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 40 changer transitions 0/75 dead transitions. [2020-10-15 23:33:04,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 75 transitions, 787 flow [2020-10-15 23:33:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 23:33:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 23:33:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4854 transitions. [2020-10-15 23:33:04,495 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6526825332795482 [2020-10-15 23:33:04,495 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4854 transitions. [2020-10-15 23:33:04,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4854 transitions. [2020-10-15 23:33:04,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:04,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4854 transitions. [2020-10-15 23:33:04,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-15 23:33:04,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-15 23:33:04,504 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-15 23:33:04,505 INFO L185 Difference]: Start difference. First operand has 145 places, 74 transitions, 617 flow. Second operand 37 states and 4854 transitions. [2020-10-15 23:33:04,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 75 transitions, 787 flow [2020-10-15 23:33:04,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 75 transitions, 643 flow, removed 34 selfloop flow, removed 34 redundant places. [2020-10-15 23:33:04,516 INFO L241 Difference]: Finished difference. Result has 148 places, 75 transitions, 627 flow [2020-10-15 23:33:04,516 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=627, PETRI_PLACES=148, PETRI_TRANSITIONS=75} [2020-10-15 23:33:04,517 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 129 predicate places. [2020-10-15 23:33:04,517 INFO L481 AbstractCegarLoop]: Abstraction has has 148 places, 75 transitions, 627 flow [2020-10-15 23:33:04,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 23:33:04,517 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:04,517 INFO L255 CegarLoopForPetriNet]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:33:04,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 23:33:04,731 INFO L429 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:33:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:04,731 INFO L82 PathProgramCache]: Analyzing trace with hash -230715141, now seen corresponding path program 32 times [2020-10-15 23:33:04,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:04,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878025149] [2020-10-15 23:33:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878025149] [2020-10-15 23:33:05,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848217567] [2020-10-15 23:33:05,563 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:05,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:33:05,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:05,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-15 23:33:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:05,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:05,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-15 23:33:05,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076652644] [2020-10-15 23:33:05,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 23:33:05,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 23:33:05,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 23:33:05,663 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:33:05,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 75 transitions, 627 flow. Second operand 39 states. [2020-10-15 23:33:05,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:05,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:33:05,665 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:05,755 INFO L129 PetriNetUnfolder]: 39/155 cut-off events. [2020-10-15 23:33:05,755 INFO L130 PetriNetUnfolder]: For 730/734 co-relation queries the response was YES. [2020-10-15 23:33:05,756 INFO L80 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 155 events. 39/155 cut-off events. For 730/734 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/136 useless extension candidates. Maximal degree in co-relation 497. Up to 28 conditions per place. [2020-10-15 23:33:05,757 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 41 changer transitions 0/76 dead transitions. [2020-10-15 23:33:05,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 76 transitions, 801 flow [2020-10-15 23:33:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 23:33:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 23:33:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4985 transitions. [2020-10-15 23:33:05,763 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6526577638125164 [2020-10-15 23:33:05,763 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4985 transitions. [2020-10-15 23:33:05,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4985 transitions. [2020-10-15 23:33:05,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:05,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4985 transitions. [2020-10-15 23:33:05,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-15 23:33:05,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-15 23:33:05,772 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-15 23:33:05,773 INFO L185 Difference]: Start difference. First operand has 148 places, 75 transitions, 627 flow. Second operand 38 states and 4985 transitions. [2020-10-15 23:33:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 76 transitions, 801 flow [2020-10-15 23:33:05,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 76 transitions, 653 flow, removed 35 selfloop flow, removed 35 redundant places. [2020-10-15 23:33:05,784 INFO L241 Difference]: Finished difference. Result has 151 places, 76 transitions, 637 flow [2020-10-15 23:33:05,785 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=637, PETRI_PLACES=151, PETRI_TRANSITIONS=76} [2020-10-15 23:33:05,785 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 132 predicate places. [2020-10-15 23:33:05,785 INFO L481 AbstractCegarLoop]: Abstraction has has 151 places, 76 transitions, 637 flow [2020-10-15 23:33:05,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 23:33:05,785 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:05,785 INFO L255 CegarLoopForPetriNet]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:33:06,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 23:33:06,001 INFO L429 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:33:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1082239696, now seen corresponding path program 33 times [2020-10-15 23:33:06,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:06,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542676447] [2020-10-15 23:33:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542676447] [2020-10-15 23:33:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963154658] [2020-10-15 23:33:06,752 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-15 23:33:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-15 23:33:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:39,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:39,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-15 23:33:39,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802413032] [2020-10-15 23:33:39,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 23:33:39,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 23:33:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 23:33:39,103 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:33:39,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 76 transitions, 637 flow. Second operand 40 states. [2020-10-15 23:33:39,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:39,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:33:39,106 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:39,208 INFO L129 PetriNetUnfolder]: 37/150 cut-off events. [2020-10-15 23:33:39,209 INFO L130 PetriNetUnfolder]: For 754/759 co-relation queries the response was YES. [2020-10-15 23:33:39,210 INFO L80 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 150 events. 37/150 cut-off events. For 754/759 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/134 useless extension candidates. Maximal degree in co-relation 480. Up to 27 conditions per place. [2020-10-15 23:33:39,211 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 42 changer transitions 0/77 dead transitions. [2020-10-15 23:33:39,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 77 transitions, 815 flow [2020-10-15 23:33:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 23:33:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 23:33:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5116 transitions. [2020-10-15 23:33:39,216 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6526342645745631 [2020-10-15 23:33:39,217 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5116 transitions. [2020-10-15 23:33:39,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5116 transitions. [2020-10-15 23:33:39,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:39,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5116 transitions. [2020-10-15 23:33:39,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-15 23:33:39,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-15 23:33:39,228 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-15 23:33:39,228 INFO L185 Difference]: Start difference. First operand has 151 places, 76 transitions, 637 flow. Second operand 39 states and 5116 transitions. [2020-10-15 23:33:39,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 77 transitions, 815 flow [2020-10-15 23:33:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 77 transitions, 663 flow, removed 36 selfloop flow, removed 36 redundant places. [2020-10-15 23:33:39,257 INFO L241 Difference]: Finished difference. Result has 154 places, 77 transitions, 647 flow [2020-10-15 23:33:39,257 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=647, PETRI_PLACES=154, PETRI_TRANSITIONS=77} [2020-10-15 23:33:39,258 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 135 predicate places. [2020-10-15 23:33:39,258 INFO L481 AbstractCegarLoop]: Abstraction has has 154 places, 77 transitions, 647 flow [2020-10-15 23:33:39,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 23:33:39,258 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:39,258 INFO L255 CegarLoopForPetriNet]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:33:39,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 23:33:39,474 INFO L429 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:33:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1709697125, now seen corresponding path program 34 times [2020-10-15 23:33:39,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:39,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285883771] [2020-10-15 23:33:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285883771] [2020-10-15 23:33:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468946990] [2020-10-15 23:33:40,302 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:40,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:33:40,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-15 23:33:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:40,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:40,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-15 23:33:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079236671] [2020-10-15 23:33:40,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 23:33:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 23:33:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 23:33:40,403 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:33:40,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 77 transitions, 647 flow. Second operand 41 states. [2020-10-15 23:33:40,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:40,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:33:40,406 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:40,509 INFO L129 PetriNetUnfolder]: 39/157 cut-off events. [2020-10-15 23:33:40,509 INFO L130 PetriNetUnfolder]: For 799/803 co-relation queries the response was YES. [2020-10-15 23:33:40,510 INFO L80 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 157 events. 39/157 cut-off events. For 799/803 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 511. Up to 28 conditions per place. [2020-10-15 23:33:40,512 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 43 changer transitions 0/78 dead transitions. [2020-10-15 23:33:40,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 78 transitions, 829 flow [2020-10-15 23:33:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 23:33:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 23:33:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5247 transitions. [2020-10-15 23:33:40,517 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6526119402985074 [2020-10-15 23:33:40,517 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5247 transitions. [2020-10-15 23:33:40,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5247 transitions. [2020-10-15 23:33:40,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:40,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5247 transitions. [2020-10-15 23:33:40,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-15 23:33:40,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-15 23:33:40,526 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-15 23:33:40,527 INFO L185 Difference]: Start difference. First operand has 154 places, 77 transitions, 647 flow. Second operand 40 states and 5247 transitions. [2020-10-15 23:33:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 78 transitions, 829 flow [2020-10-15 23:33:40,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 78 transitions, 673 flow, removed 37 selfloop flow, removed 37 redundant places. [2020-10-15 23:33:40,541 INFO L241 Difference]: Finished difference. Result has 157 places, 78 transitions, 657 flow [2020-10-15 23:33:40,541 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=657, PETRI_PLACES=157, PETRI_TRANSITIONS=78} [2020-10-15 23:33:40,542 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 138 predicate places. [2020-10-15 23:33:40,542 INFO L481 AbstractCegarLoop]: Abstraction has has 157 places, 78 transitions, 657 flow [2020-10-15 23:33:40,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 23:33:40,542 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:40,542 INFO L255 CegarLoopForPetriNet]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:33:40,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 23:33:40,757 INFO L429 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:33:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash 313959056, now seen corresponding path program 35 times [2020-10-15 23:33:40,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:40,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073828808] [2020-10-15 23:33:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073828808] [2020-10-15 23:33:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860246954] [2020-10-15 23:33:41,886 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:56,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-15 23:33:56,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:56,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-15 23:33:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:56,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:56,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-15 23:33:56,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738743179] [2020-10-15 23:33:56,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 23:33:56,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 23:33:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 23:33:56,193 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:33:56,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 78 transitions, 657 flow. Second operand 42 states. [2020-10-15 23:33:56,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:56,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:33:56,196 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:56,307 INFO L129 PetriNetUnfolder]: 39/158 cut-off events. [2020-10-15 23:33:56,307 INFO L130 PetriNetUnfolder]: For 835/839 co-relation queries the response was YES. [2020-10-15 23:33:56,308 INFO L80 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 158 events. 39/158 cut-off events. For 835/839 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/139 useless extension candidates. Maximal degree in co-relation 518. Up to 28 conditions per place. [2020-10-15 23:33:56,310 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 44 changer transitions 0/79 dead transitions. [2020-10-15 23:33:56,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 79 transitions, 843 flow [2020-10-15 23:33:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 23:33:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 23:33:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5378 transitions. [2020-10-15 23:33:56,314 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6525907050115277 [2020-10-15 23:33:56,315 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5378 transitions. [2020-10-15 23:33:56,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5378 transitions. [2020-10-15 23:33:56,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:56,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5378 transitions. [2020-10-15 23:33:56,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-15 23:33:56,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-15 23:33:56,326 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-15 23:33:56,326 INFO L185 Difference]: Start difference. First operand has 157 places, 78 transitions, 657 flow. Second operand 41 states and 5378 transitions. [2020-10-15 23:33:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 79 transitions, 843 flow [2020-10-15 23:33:56,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 79 transitions, 683 flow, removed 38 selfloop flow, removed 38 redundant places. [2020-10-15 23:33:56,340 INFO L241 Difference]: Finished difference. Result has 160 places, 79 transitions, 667 flow [2020-10-15 23:33:56,341 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=667, PETRI_PLACES=160, PETRI_TRANSITIONS=79} [2020-10-15 23:33:56,341 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 141 predicate places. [2020-10-15 23:33:56,341 INFO L481 AbstractCegarLoop]: Abstraction has has 160 places, 79 transitions, 667 flow [2020-10-15 23:33:56,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 23:33:56,341 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:56,341 INFO L255 CegarLoopForPetriNet]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:33:56,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:56,555 INFO L429 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:33:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1377208773, now seen corresponding path program 36 times [2020-10-15 23:33:56,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:56,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137569839] [2020-10-15 23:33:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:33:57,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137569839] [2020-10-15 23:33:57,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209842882] [2020-10-15 23:33:57,508 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:35:35,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-10-15 23:35:35,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:35:37,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-15 23:35:37,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:35:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:35:37,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:35:37,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-15 23:35:37,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101575429] [2020-10-15 23:35:37,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 23:35:37,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:35:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 23:35:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 23:35:37,744 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:35:37,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 79 transitions, 667 flow. Second operand 43 states. [2020-10-15 23:35:37,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:35:37,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:35:37,747 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:35:37,846 INFO L129 PetriNetUnfolder]: 39/159 cut-off events. [2020-10-15 23:35:37,847 INFO L130 PetriNetUnfolder]: For 872/876 co-relation queries the response was YES. [2020-10-15 23:35:37,847 INFO L80 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 159 events. 39/159 cut-off events. For 872/876 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/140 useless extension candidates. Maximal degree in co-relation 525. Up to 28 conditions per place. [2020-10-15 23:35:37,849 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 45 changer transitions 0/80 dead transitions. [2020-10-15 23:35:37,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 80 transitions, 857 flow [2020-10-15 23:35:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 23:35:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 23:35:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5509 transitions. [2020-10-15 23:35:37,854 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6525704809286899 [2020-10-15 23:35:37,854 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5509 transitions. [2020-10-15 23:35:37,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5509 transitions. [2020-10-15 23:35:37,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:35:37,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5509 transitions. [2020-10-15 23:35:37,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-15 23:35:37,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-15 23:35:37,864 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-15 23:35:37,864 INFO L185 Difference]: Start difference. First operand has 160 places, 79 transitions, 667 flow. Second operand 42 states and 5509 transitions. [2020-10-15 23:35:37,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 80 transitions, 857 flow [2020-10-15 23:35:37,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 80 transitions, 693 flow, removed 39 selfloop flow, removed 39 redundant places. [2020-10-15 23:35:37,880 INFO L241 Difference]: Finished difference. Result has 163 places, 80 transitions, 677 flow [2020-10-15 23:35:37,880 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=677, PETRI_PLACES=163, PETRI_TRANSITIONS=80} [2020-10-15 23:35:37,880 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 144 predicate places. [2020-10-15 23:35:37,881 INFO L481 AbstractCegarLoop]: Abstraction has has 163 places, 80 transitions, 677 flow [2020-10-15 23:35:37,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 23:35:37,881 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:35:37,881 INFO L255 CegarLoopForPetriNet]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:35:38,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 23:35:38,095 INFO L429 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:35:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:35:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2031163376, now seen corresponding path program 37 times [2020-10-15 23:35:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:35:38,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509541286] [2020-10-15 23:35:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:35:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:35:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:35:39,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509541286] [2020-10-15 23:35:39,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300688526] [2020-10-15 23:35:39,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:35:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:35:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-15 23:35:39,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:35:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:35:39,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:35:39,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-10-15 23:35:39,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695657047] [2020-10-15 23:35:39,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 23:35:39,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:35:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 23:35:39,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 23:35:39,221 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:35:39,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 80 transitions, 677 flow. Second operand 44 states. [2020-10-15 23:35:39,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:35:39,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:35:39,223 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:35:39,314 INFO L129 PetriNetUnfolder]: 37/154 cut-off events. [2020-10-15 23:35:39,314 INFO L130 PetriNetUnfolder]: For 900/905 co-relation queries the response was YES. [2020-10-15 23:35:39,315 INFO L80 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 154 events. 37/154 cut-off events. For 900/905 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 508. Up to 27 conditions per place. [2020-10-15 23:35:39,316 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 46 changer transitions 0/81 dead transitions. [2020-10-15 23:35:39,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 81 transitions, 871 flow [2020-10-15 23:35:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 23:35:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 23:35:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5640 transitions. [2020-10-15 23:35:39,322 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6525511975008678 [2020-10-15 23:35:39,322 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5640 transitions. [2020-10-15 23:35:39,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5640 transitions. [2020-10-15 23:35:39,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:35:39,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5640 transitions. [2020-10-15 23:35:39,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 44 states. [2020-10-15 23:35:39,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 44 states. [2020-10-15 23:35:39,332 INFO L81 ComplementDD]: Finished complementDD. Result 44 states. [2020-10-15 23:35:39,332 INFO L185 Difference]: Start difference. First operand has 163 places, 80 transitions, 677 flow. Second operand 43 states and 5640 transitions. [2020-10-15 23:35:39,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 81 transitions, 871 flow [2020-10-15 23:35:39,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 81 transitions, 703 flow, removed 40 selfloop flow, removed 40 redundant places. [2020-10-15 23:35:39,346 INFO L241 Difference]: Finished difference. Result has 166 places, 81 transitions, 687 flow [2020-10-15 23:35:39,347 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=687, PETRI_PLACES=166, PETRI_TRANSITIONS=81} [2020-10-15 23:35:39,347 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 147 predicate places. [2020-10-15 23:35:39,347 INFO L481 AbstractCegarLoop]: Abstraction has has 166 places, 81 transitions, 687 flow [2020-10-15 23:35:39,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 23:35:39,347 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:35:39,347 INFO L255 CegarLoopForPetriNet]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:35:39,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:35:39,562 INFO L429 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:35:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:35:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash 316517595, now seen corresponding path program 38 times [2020-10-15 23:35:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:35:39,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427884965] [2020-10-15 23:35:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:35:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:35:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:35:40,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427884965] [2020-10-15 23:35:40,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394809982] [2020-10-15 23:35:40,663 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:35:40,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:35:40,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:35:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-15 23:35:40,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:35:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:35:40,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:35:40,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-10-15 23:35:40,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532800969] [2020-10-15 23:35:40,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 23:35:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:35:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 23:35:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 23:35:40,834 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:35:40,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 81 transitions, 687 flow. Second operand 45 states. [2020-10-15 23:35:40,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:35:40,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:35:40,839 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:35:40,987 INFO L129 PetriNetUnfolder]: 39/161 cut-off events. [2020-10-15 23:35:40,987 INFO L130 PetriNetUnfolder]: For 949/953 co-relation queries the response was YES. [2020-10-15 23:35:40,989 INFO L80 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 161 events. 39/161 cut-off events. For 949/953 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 539. Up to 28 conditions per place. [2020-10-15 23:35:40,991 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 47 changer transitions 0/82 dead transitions. [2020-10-15 23:35:40,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 82 transitions, 885 flow [2020-10-15 23:35:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 23:35:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 23:35:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5771 transitions. [2020-10-15 23:35:41,000 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6525327905924921 [2020-10-15 23:35:41,001 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5771 transitions. [2020-10-15 23:35:41,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5771 transitions. [2020-10-15 23:35:41,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:35:41,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5771 transitions. [2020-10-15 23:35:41,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-15 23:35:41,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-15 23:35:41,020 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-15 23:35:41,020 INFO L185 Difference]: Start difference. First operand has 166 places, 81 transitions, 687 flow. Second operand 44 states and 5771 transitions. [2020-10-15 23:35:41,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 82 transitions, 885 flow [2020-10-15 23:35:41,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 82 transitions, 713 flow, removed 41 selfloop flow, removed 41 redundant places. [2020-10-15 23:35:41,049 INFO L241 Difference]: Finished difference. Result has 169 places, 82 transitions, 697 flow [2020-10-15 23:35:41,049 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=697, PETRI_PLACES=169, PETRI_TRANSITIONS=82} [2020-10-15 23:35:41,050 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 150 predicate places. [2020-10-15 23:35:41,050 INFO L481 AbstractCegarLoop]: Abstraction has has 169 places, 82 transitions, 697 flow [2020-10-15 23:35:41,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 23:35:41,050 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:35:41,050 INFO L255 CegarLoopForPetriNet]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:35:41,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:35:41,264 INFO L429 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:35:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:35:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1297894064, now seen corresponding path program 39 times [2020-10-15 23:35:41,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:35:41,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102626479] [2020-10-15 23:35:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:35:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:35:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:35:42,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102626479] [2020-10-15 23:35:42,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969441059] [2020-10-15 23:35:42,317 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:04,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-15 23:36:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:36:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-15 23:36:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:36:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:36:04,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:36:04,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-10-15 23:36:04,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188253943] [2020-10-15 23:36:04,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 23:36:04,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:36:04,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 23:36:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 23:36:04,632 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:36:04,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 82 transitions, 697 flow. Second operand 46 states. [2020-10-15 23:36:04,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:36:04,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:36:04,634 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:36:04,730 INFO L129 PetriNetUnfolder]: 39/162 cut-off events. [2020-10-15 23:36:04,730 INFO L130 PetriNetUnfolder]: For 989/993 co-relation queries the response was YES. [2020-10-15 23:36:04,731 INFO L80 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 162 events. 39/162 cut-off events. For 989/993 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/143 useless extension candidates. Maximal degree in co-relation 546. Up to 28 conditions per place. [2020-10-15 23:36:04,732 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 48 changer transitions 0/83 dead transitions. [2020-10-15 23:36:04,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 83 transitions, 899 flow [2020-10-15 23:36:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 23:36:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 23:36:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5902 transitions. [2020-10-15 23:36:04,738 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6525152017689331 [2020-10-15 23:36:04,738 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5902 transitions. [2020-10-15 23:36:04,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5902 transitions. [2020-10-15 23:36:04,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:36:04,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5902 transitions. [2020-10-15 23:36:04,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-15 23:36:04,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-15 23:36:04,749 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-15 23:36:04,749 INFO L185 Difference]: Start difference. First operand has 169 places, 82 transitions, 697 flow. Second operand 45 states and 5902 transitions. [2020-10-15 23:36:04,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 83 transitions, 899 flow [2020-10-15 23:36:04,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 83 transitions, 723 flow, removed 42 selfloop flow, removed 42 redundant places. [2020-10-15 23:36:04,766 INFO L241 Difference]: Finished difference. Result has 172 places, 83 transitions, 707 flow [2020-10-15 23:36:04,766 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=707, PETRI_PLACES=172, PETRI_TRANSITIONS=83} [2020-10-15 23:36:04,766 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 153 predicate places. [2020-10-15 23:36:04,766 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 83 transitions, 707 flow [2020-10-15 23:36:04,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 23:36:04,767 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:36:04,767 INFO L255 CegarLoopForPetriNet]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:36:04,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 23:36:04,982 INFO L429 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:36:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:36:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash 194952059, now seen corresponding path program 40 times [2020-10-15 23:36:04,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:36:04,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381875558] [2020-10-15 23:36:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:36:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:36:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:36:06,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381875558] [2020-10-15 23:36:06,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936115938] [2020-10-15 23:36:06,077 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:06,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:36:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:36:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-15 23:36:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:36:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:36:06,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:36:06,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-10-15 23:36:06,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431245392] [2020-10-15 23:36:06,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 23:36:06,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:36:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 23:36:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 23:36:06,188 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:36:06,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 83 transitions, 707 flow. Second operand 47 states. [2020-10-15 23:36:06,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:36:06,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:36:06,190 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:36:06,286 INFO L129 PetriNetUnfolder]: 39/163 cut-off events. [2020-10-15 23:36:06,286 INFO L130 PetriNetUnfolder]: For 1030/1034 co-relation queries the response was YES. [2020-10-15 23:36:06,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 163 events. 39/163 cut-off events. For 1030/1034 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/144 useless extension candidates. Maximal degree in co-relation 553. Up to 28 conditions per place. [2020-10-15 23:36:06,288 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 49 changer transitions 0/84 dead transitions. [2020-10-15 23:36:06,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 84 transitions, 913 flow [2020-10-15 23:36:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 23:36:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 23:36:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6033 transitions. [2020-10-15 23:36:06,292 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6524983776768333 [2020-10-15 23:36:06,292 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6033 transitions. [2020-10-15 23:36:06,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6033 transitions. [2020-10-15 23:36:06,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:36:06,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6033 transitions. [2020-10-15 23:36:06,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-15 23:36:06,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-15 23:36:06,302 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-15 23:36:06,302 INFO L185 Difference]: Start difference. First operand has 172 places, 83 transitions, 707 flow. Second operand 46 states and 6033 transitions. [2020-10-15 23:36:06,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 84 transitions, 913 flow [2020-10-15 23:36:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 84 transitions, 733 flow, removed 43 selfloop flow, removed 43 redundant places. [2020-10-15 23:36:06,318 INFO L241 Difference]: Finished difference. Result has 175 places, 84 transitions, 717 flow [2020-10-15 23:36:06,319 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=717, PETRI_PLACES=175, PETRI_TRANSITIONS=84} [2020-10-15 23:36:06,319 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 156 predicate places. [2020-10-15 23:36:06,319 INFO L481 AbstractCegarLoop]: Abstraction has has 175 places, 84 transitions, 717 flow [2020-10-15 23:36:06,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 23:36:06,319 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:36:06,319 INFO L255 CegarLoopForPetriNet]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:36:06,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 23:36:06,532 INFO L429 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:36:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:36:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash -771458384, now seen corresponding path program 41 times [2020-10-15 23:36:06,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:36:06,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767785383] [2020-10-15 23:36:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:36:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:36:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:36:07,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767785383] [2020-10-15 23:36:07,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034231437] [2020-10-15 23:36:07,623 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:21,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-10-15 23:36:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:36:21,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-15 23:36:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:36:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:36:21,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:36:21,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-10-15 23:36:21,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805451906] [2020-10-15 23:36:21,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 23:36:21,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:36:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 23:36:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 23:36:21,338 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:36:21,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 84 transitions, 717 flow. Second operand 48 states. [2020-10-15 23:36:21,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:36:21,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:36:21,340 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:36:21,478 INFO L129 PetriNetUnfolder]: 37/158 cut-off events. [2020-10-15 23:36:21,478 INFO L130 PetriNetUnfolder]: For 1062/1067 co-relation queries the response was YES. [2020-10-15 23:36:21,479 INFO L80 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 158 events. 37/158 cut-off events. For 1062/1067 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/142 useless extension candidates. Maximal degree in co-relation 536. Up to 27 conditions per place. [2020-10-15 23:36:21,480 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 50 changer transitions 0/85 dead transitions. [2020-10-15 23:36:21,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 85 transitions, 927 flow [2020-10-15 23:36:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 23:36:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 23:36:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6164 transitions. [2020-10-15 23:36:21,486 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2020-10-15 23:36:21,487 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6164 transitions. [2020-10-15 23:36:21,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6164 transitions. [2020-10-15 23:36:21,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:36:21,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6164 transitions. [2020-10-15 23:36:21,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-15 23:36:21,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-15 23:36:21,501 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-15 23:36:21,502 INFO L185 Difference]: Start difference. First operand has 175 places, 84 transitions, 717 flow. Second operand 47 states and 6164 transitions. [2020-10-15 23:36:21,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 85 transitions, 927 flow [2020-10-15 23:36:21,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 85 transitions, 743 flow, removed 44 selfloop flow, removed 44 redundant places. [2020-10-15 23:36:21,525 INFO L241 Difference]: Finished difference. Result has 178 places, 85 transitions, 727 flow [2020-10-15 23:36:21,525 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=727, PETRI_PLACES=178, PETRI_TRANSITIONS=85} [2020-10-15 23:36:21,526 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 159 predicate places. [2020-10-15 23:36:21,526 INFO L481 AbstractCegarLoop]: Abstraction has has 178 places, 85 transitions, 727 flow [2020-10-15 23:36:21,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 23:36:21,526 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:36:21,526 INFO L255 CegarLoopForPetriNet]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:36:21,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 23:36:21,741 INFO L429 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:36:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:36:21,742 INFO L82 PathProgramCache]: Analyzing trace with hash -665411045, now seen corresponding path program 42 times [2020-10-15 23:36:21,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:36:21,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856157593] [2020-10-15 23:36:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:36:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:36:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:36:22,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856157593] [2020-10-15 23:36:22,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060950949] [2020-10-15 23:36:22,938 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:34,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-15 23:39:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-15 23:39:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:39:38,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:38,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-10-15 23:39:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894881772] [2020-10-15 23:39:38,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 23:39:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 23:39:38,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 23:39:38,882 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:39:38,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 85 transitions, 727 flow. Second operand 49 states. [2020-10-15 23:39:38,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:38,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:39:38,885 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:38,991 INFO L129 PetriNetUnfolder]: 39/165 cut-off events. [2020-10-15 23:39:38,991 INFO L130 PetriNetUnfolder]: For 1115/1119 co-relation queries the response was YES. [2020-10-15 23:39:38,992 INFO L80 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 165 events. 39/165 cut-off events. For 1115/1119 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/146 useless extension candidates. Maximal degree in co-relation 567. Up to 28 conditions per place. [2020-10-15 23:39:38,993 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 51 changer transitions 0/86 dead transitions. [2020-10-15 23:39:38,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 86 transitions, 941 flow [2020-10-15 23:39:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 23:39:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 23:39:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6295 transitions. [2020-10-15 23:39:38,998 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6524668325041459 [2020-10-15 23:39:38,998 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6295 transitions. [2020-10-15 23:39:38,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6295 transitions. [2020-10-15 23:39:38,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:38,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6295 transitions. [2020-10-15 23:39:39,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-15 23:39:39,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-15 23:39:39,005 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-15 23:39:39,005 INFO L185 Difference]: Start difference. First operand has 178 places, 85 transitions, 727 flow. Second operand 48 states and 6295 transitions. [2020-10-15 23:39:39,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 86 transitions, 941 flow [2020-10-15 23:39:39,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 86 transitions, 753 flow, removed 45 selfloop flow, removed 45 redundant places. [2020-10-15 23:39:39,017 INFO L241 Difference]: Finished difference. Result has 181 places, 86 transitions, 737 flow [2020-10-15 23:39:39,018 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=737, PETRI_PLACES=181, PETRI_TRANSITIONS=86} [2020-10-15 23:39:39,018 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 162 predicate places. [2020-10-15 23:39:39,018 INFO L481 AbstractCegarLoop]: Abstraction has has 181 places, 86 transitions, 737 flow [2020-10-15 23:39:39,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 23:39:39,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:39,018 INFO L255 CegarLoopForPetriNet]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:39:39,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:39,234 INFO L429 AbstractCegarLoop]: === Iteration 49 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:39:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1672910832, now seen corresponding path program 43 times [2020-10-15 23:39:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367736406] [2020-10-15 23:39:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:39:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367736406] [2020-10-15 23:39:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610608083] [2020-10-15 23:39:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-15 23:39:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:39:40,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:40,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-10-15 23:39:40,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177001011] [2020-10-15 23:39:40,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 23:39:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 23:39:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 23:39:40,586 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:39:40,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 86 transitions, 737 flow. Second operand 50 states. [2020-10-15 23:39:40,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:40,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:39:40,588 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:40,692 INFO L129 PetriNetUnfolder]: 39/166 cut-off events. [2020-10-15 23:39:40,693 INFO L130 PetriNetUnfolder]: For 1159/1163 co-relation queries the response was YES. [2020-10-15 23:39:40,693 INFO L80 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 166 events. 39/166 cut-off events. For 1159/1163 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/147 useless extension candidates. Maximal degree in co-relation 574. Up to 28 conditions per place. [2020-10-15 23:39:40,694 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 52 changer transitions 0/87 dead transitions. [2020-10-15 23:39:40,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 87 transitions, 955 flow [2020-10-15 23:39:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 23:39:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 23:39:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6426 transitions. [2020-10-15 23:39:40,698 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.652452025586354 [2020-10-15 23:39:40,698 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6426 transitions. [2020-10-15 23:39:40,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6426 transitions. [2020-10-15 23:39:40,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:40,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6426 transitions. [2020-10-15 23:39:40,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 50 states. [2020-10-15 23:39:40,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 50 states. [2020-10-15 23:39:40,706 INFO L81 ComplementDD]: Finished complementDD. Result 50 states. [2020-10-15 23:39:40,706 INFO L185 Difference]: Start difference. First operand has 181 places, 86 transitions, 737 flow. Second operand 49 states and 6426 transitions. [2020-10-15 23:39:40,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 87 transitions, 955 flow [2020-10-15 23:39:40,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 87 transitions, 763 flow, removed 46 selfloop flow, removed 46 redundant places. [2020-10-15 23:39:40,723 INFO L241 Difference]: Finished difference. Result has 184 places, 87 transitions, 747 flow [2020-10-15 23:39:40,723 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=747, PETRI_PLACES=184, PETRI_TRANSITIONS=87} [2020-10-15 23:39:40,723 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 165 predicate places. [2020-10-15 23:39:40,723 INFO L481 AbstractCegarLoop]: Abstraction has has 184 places, 87 transitions, 747 flow [2020-10-15 23:39:40,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 23:39:40,723 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:40,724 INFO L255 CegarLoopForPetriNet]: trace histogram [47, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:39:40,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 23:39:40,938 INFO L429 AbstractCegarLoop]: === Iteration 50 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:39:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1454334139, now seen corresponding path program 44 times [2020-10-15 23:39:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:40,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712094682] [2020-10-15 23:39:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:39:42,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712094682] [2020-10-15 23:39:42,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086246275] [2020-10-15 23:39:42,267 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:42,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:39:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2020-10-15 23:39:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:39:42,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:42,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-10-15 23:39:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960688499] [2020-10-15 23:39:42,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 23:39:42,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 23:39:42,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 23:39:42,370 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:39:42,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 87 transitions, 747 flow. Second operand 51 states. [2020-10-15 23:39:42,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:42,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:39:42,372 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:42,493 INFO L129 PetriNetUnfolder]: 39/167 cut-off events. [2020-10-15 23:39:42,493 INFO L130 PetriNetUnfolder]: For 1204/1208 co-relation queries the response was YES. [2020-10-15 23:39:42,494 INFO L80 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 167 events. 39/167 cut-off events. For 1204/1208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/148 useless extension candidates. Maximal degree in co-relation 581. Up to 28 conditions per place. [2020-10-15 23:39:42,495 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 53 changer transitions 0/88 dead transitions. [2020-10-15 23:39:42,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 88 transitions, 969 flow [2020-10-15 23:39:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 23:39:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 23:39:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 6557 transitions. [2020-10-15 23:39:42,501 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6524378109452736 [2020-10-15 23:39:42,502 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 6557 transitions. [2020-10-15 23:39:42,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 6557 transitions. [2020-10-15 23:39:42,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:42,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 6557 transitions. [2020-10-15 23:39:42,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-15 23:39:42,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-15 23:39:42,513 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-15 23:39:42,513 INFO L185 Difference]: Start difference. First operand has 184 places, 87 transitions, 747 flow. Second operand 50 states and 6557 transitions. [2020-10-15 23:39:42,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 88 transitions, 969 flow [2020-10-15 23:39:42,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 88 transitions, 773 flow, removed 47 selfloop flow, removed 47 redundant places. [2020-10-15 23:39:42,532 INFO L241 Difference]: Finished difference. Result has 187 places, 88 transitions, 757 flow [2020-10-15 23:39:42,532 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=757, PETRI_PLACES=187, PETRI_TRANSITIONS=88} [2020-10-15 23:39:42,532 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 168 predicate places. [2020-10-15 23:39:42,532 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 88 transitions, 757 flow [2020-10-15 23:39:42,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 23:39:42,533 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:42,533 INFO L255 CegarLoopForPetriNet]: trace histogram [48, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:39:42,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 23:39:42,745 INFO L429 AbstractCegarLoop]: === Iteration 51 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:39:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash -385319568, now seen corresponding path program 45 times [2020-10-15 23:39:42,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:42,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347156849] [2020-10-15 23:39:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:39:44,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347156849] [2020-10-15 23:39:44,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911450611] [2020-10-15 23:39:44,121 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:09,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-10-15 23:40:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-15 23:40:09,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:40:09,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:09,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-10-15 23:40:09,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659122705] [2020-10-15 23:40:09,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 23:40:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 23:40:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 23:40:09,356 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:40:09,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 88 transitions, 757 flow. Second operand 52 states. [2020-10-15 23:40:09,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:09,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:40:09,358 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:09,461 INFO L129 PetriNetUnfolder]: 37/162 cut-off events. [2020-10-15 23:40:09,461 INFO L130 PetriNetUnfolder]: For 1240/1245 co-relation queries the response was YES. [2020-10-15 23:40:09,462 INFO L80 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 162 events. 37/162 cut-off events. For 1240/1245 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 426 event pairs, 0 based on Foata normal form. 4/146 useless extension candidates. Maximal degree in co-relation 564. Up to 27 conditions per place. [2020-10-15 23:40:09,463 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 54 changer transitions 0/89 dead transitions. [2020-10-15 23:40:09,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 89 transitions, 983 flow [2020-10-15 23:40:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 23:40:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 23:40:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6688 transitions. [2020-10-15 23:40:09,469 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6524241537410984 [2020-10-15 23:40:09,470 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6688 transitions. [2020-10-15 23:40:09,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6688 transitions. [2020-10-15 23:40:09,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:09,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6688 transitions. [2020-10-15 23:40:09,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-15 23:40:09,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-15 23:40:09,482 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-15 23:40:09,482 INFO L185 Difference]: Start difference. First operand has 187 places, 88 transitions, 757 flow. Second operand 51 states and 6688 transitions. [2020-10-15 23:40:09,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 89 transitions, 983 flow [2020-10-15 23:40:09,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 89 transitions, 783 flow, removed 48 selfloop flow, removed 48 redundant places. [2020-10-15 23:40:09,508 INFO L241 Difference]: Finished difference. Result has 190 places, 89 transitions, 767 flow [2020-10-15 23:40:09,508 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=767, PETRI_PLACES=190, PETRI_TRANSITIONS=89} [2020-10-15 23:40:09,508 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 171 predicate places. [2020-10-15 23:40:09,508 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 89 transitions, 767 flow [2020-10-15 23:40:09,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 23:40:09,508 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:09,509 INFO L255 CegarLoopForPetriNet]: trace histogram [49, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:40:09,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:09,722 INFO L429 AbstractCegarLoop]: === Iteration 52 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:40:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:09,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1580009637, now seen corresponding path program 46 times [2020-10-15 23:40:09,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:09,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505555505] [2020-10-15 23:40:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:40:11,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505555505] [2020-10-15 23:40:11,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112266744] [2020-10-15 23:40:11,146 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:11,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:40:11,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:11,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2020-10-15 23:40:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:40:11,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:11,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-10-15 23:40:11,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484723940] [2020-10-15 23:40:11,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 23:40:11,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 23:40:11,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 23:40:11,284 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:40:11,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 89 transitions, 767 flow. Second operand 53 states. [2020-10-15 23:40:11,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:11,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:40:11,289 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:11,397 INFO L129 PetriNetUnfolder]: 39/169 cut-off events. [2020-10-15 23:40:11,397 INFO L130 PetriNetUnfolder]: For 1297/1301 co-relation queries the response was YES. [2020-10-15 23:40:11,398 INFO L80 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 169 events. 39/169 cut-off events. For 1297/1301 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/150 useless extension candidates. Maximal degree in co-relation 595. Up to 28 conditions per place. [2020-10-15 23:40:11,398 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 55 changer transitions 0/90 dead transitions. [2020-10-15 23:40:11,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 90 transitions, 997 flow [2020-10-15 23:40:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 23:40:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 23:40:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6819 transitions. [2020-10-15 23:40:11,404 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6524110218140069 [2020-10-15 23:40:11,404 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6819 transitions. [2020-10-15 23:40:11,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6819 transitions. [2020-10-15 23:40:11,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:11,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6819 transitions. [2020-10-15 23:40:11,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 53 states. [2020-10-15 23:40:11,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 53 states. [2020-10-15 23:40:11,413 INFO L81 ComplementDD]: Finished complementDD. Result 53 states. [2020-10-15 23:40:11,413 INFO L185 Difference]: Start difference. First operand has 190 places, 89 transitions, 767 flow. Second operand 52 states and 6819 transitions. [2020-10-15 23:40:11,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 90 transitions, 997 flow [2020-10-15 23:40:11,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 90 transitions, 793 flow, removed 49 selfloop flow, removed 49 redundant places. [2020-10-15 23:40:11,463 INFO L241 Difference]: Finished difference. Result has 193 places, 90 transitions, 777 flow [2020-10-15 23:40:11,464 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=777, PETRI_PLACES=193, PETRI_TRANSITIONS=90} [2020-10-15 23:40:11,464 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 174 predicate places. [2020-10-15 23:40:11,464 INFO L481 AbstractCegarLoop]: Abstraction has has 193 places, 90 transitions, 777 flow [2020-10-15 23:40:11,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 23:40:11,464 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:11,464 INFO L255 CegarLoopForPetriNet]: trace histogram [50, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:40:11,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 23:40:11,665 INFO L429 AbstractCegarLoop]: === Iteration 53 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:40:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash 39303888, now seen corresponding path program 47 times [2020-10-15 23:40:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:11,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293246733] [2020-10-15 23:40:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:40:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293246733] [2020-10-15 23:40:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654979585] [2020-10-15 23:40:13,188 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:42:17,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-10-15 23:42:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:42:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2020-10-15 23:42:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:42:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:42:19,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:42:19,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-10-15 23:42:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948782370] [2020-10-15 23:42:19,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 23:42:19,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:42:19,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 23:42:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 23:42:19,932 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 201 [2020-10-15 23:42:19,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 90 transitions, 777 flow. Second operand 54 states. [2020-10-15 23:42:19,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:42:19,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 201 [2020-10-15 23:42:19,934 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:42:20,057 INFO L129 PetriNetUnfolder]: 39/170 cut-off events. [2020-10-15 23:42:20,058 INFO L130 PetriNetUnfolder]: For 1345/1349 co-relation queries the response was YES. [2020-10-15 23:42:20,059 INFO L80 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 170 events. 39/170 cut-off events. For 1345/1349 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 449 event pairs, 0 based on Foata normal form. 3/151 useless extension candidates. Maximal degree in co-relation 602. Up to 28 conditions per place. [2020-10-15 23:42:20,060 INFO L132 encePairwiseOnDemand]: 197/201 looper letters, 10 selfloop transitions, 56 changer transitions 0/91 dead transitions. [2020-10-15 23:42:20,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 91 transitions, 1011 flow [2020-10-15 23:42:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 23:42:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 23:42:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 6950 transitions. [2020-10-15 23:42:20,065 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6523983854313339 [2020-10-15 23:42:20,066 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 6950 transitions. [2020-10-15 23:42:20,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 6950 transitions. [2020-10-15 23:42:20,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:42:20,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 6950 transitions. [2020-10-15 23:42:20,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 54 states. [2020-10-15 23:42:20,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 54 states. [2020-10-15 23:42:20,077 INFO L81 ComplementDD]: Finished complementDD. Result 54 states. [2020-10-15 23:42:20,077 INFO L185 Difference]: Start difference. First operand has 193 places, 90 transitions, 777 flow. Second operand 53 states and 6950 transitions. [2020-10-15 23:42:20,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 91 transitions, 1011 flow [2020-10-15 23:42:20,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 91 transitions, 803 flow, removed 50 selfloop flow, removed 50 redundant places. [2020-10-15 23:42:20,099 INFO L241 Difference]: Finished difference. Result has 196 places, 91 transitions, 787 flow [2020-10-15 23:42:20,100 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=787, PETRI_PLACES=196, PETRI_TRANSITIONS=91} [2020-10-15 23:42:20,100 INFO L342 CegarLoopForPetriNet]: 19 programPoint places, 177 predicate places. [2020-10-15 23:42:20,100 INFO L481 AbstractCegarLoop]: Abstraction has has 196 places, 91 transitions, 787 flow [2020-10-15 23:42:20,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 23:42:20,100 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:42:20,100 INFO L255 CegarLoopForPetriNet]: trace histogram [51, 2, 2, 1, 1, 1, 1, 1] [2020-10-15 23:42:20,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:42:20,301 INFO L429 AbstractCegarLoop]: === Iteration 54 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-15 23:42:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:42:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1301584389, now seen corresponding path program 48 times [2020-10-15 23:42:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:42:20,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271127762] [2020-10-15 23:42:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:42:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:42:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 23:42:21,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271127762] [2020-10-15 23:42:21,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113399467] [2020-10-15 23:42:21,820 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown