/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-ext/19_time_var_mutex.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 15:15:52,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 15:15:52,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 15:15:52,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 15:15:52,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 15:15:52,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 15:15:52,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 15:15:52,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 15:15:52,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 15:15:52,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 15:15:52,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 15:15:52,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 15:15:52,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 15:15:52,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 15:15:52,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 15:15:52,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 15:15:52,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 15:15:52,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 15:15:52,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 15:15:52,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 15:15:52,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 15:15:52,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 15:15:52,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 15:15:52,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 15:15:52,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 15:15:52,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 15:15:52,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 15:15:52,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 15:15:52,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 15:15:52,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 15:15:52,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 15:15:52,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 15:15:52,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 15:15:52,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 15:15:52,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 15:15:52,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 15:15:52,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 15:15:52,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 15:15:52,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 15:15:52,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 15:15:52,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 15:15:52,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 15:15:52,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 15:15:52,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 15:15:52,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 15:15:52,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 15:15:52,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 15:15:52,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 15:15:52,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 15:15:52,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 15:15:52,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 15:15:52,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 15:15:52,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 15:15:52,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 15:15:52,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 15:15:52,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 15:15:52,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 15:15:52,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 15:15:52,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 15:15:52,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 15:15:52,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 15:15:52,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 15:15:52,757 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 15:15:52,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 15:15:52,758 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 15:15:52,758 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 15:15:52,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 15:15:53,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 15:15:53,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 15:15:53,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 15:15:53,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 15:15:53,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 15:15:53,080 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/19_time_var_mutex.i [2020-10-09 15:15:53,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/390dceb10/276863393c0b419cab0ceaa1f68072bb/FLAGc2ab34945 [2020-10-09 15:15:53,661 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 15:15:53,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/19_time_var_mutex.i [2020-10-09 15:15:53,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/390dceb10/276863393c0b419cab0ceaa1f68072bb/FLAGc2ab34945 [2020-10-09 15:15:53,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/390dceb10/276863393c0b419cab0ceaa1f68072bb [2020-10-09 15:15:53,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 15:15:53,990 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 15:15:53,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 15:15:53,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 15:15:53,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 15:15:53,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 03:15:53" (1/1) ... [2020-10-09 15:15:53,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fcea1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:53, skipping insertion in model container [2020-10-09 15:15:53,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 03:15:53" (1/1) ... [2020-10-09 15:15:54,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 15:15:54,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 15:15:54,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 15:15:54,541 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 15:15:54,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 15:15:54,717 INFO L208 MainTranslator]: Completed translation [2020-10-09 15:15:54,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54 WrapperNode [2020-10-09 15:15:54,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 15:15:54,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 15:15:54,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 15:15:54,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 15:15:54,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 15:15:54,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 15:15:54,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 15:15:54,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 15:15:54,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... [2020-10-09 15:15:54,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 15:15:54,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 15:15:54,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 15:15:54,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 15:15:54,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 15:15:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 15:15:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-09 15:15:54,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-09 15:15:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 15:15:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 15:15:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 15:15:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-09 15:15:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 15:15:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 15:15:54,880 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 15:15:55,653 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 15:15:55,653 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 15:15:55,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 03:15:55 BoogieIcfgContainer [2020-10-09 15:15:55,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 15:15:55,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 15:15:55,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 15:15:55,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 15:15:55,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 03:15:53" (1/3) ... [2020-10-09 15:15:55,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7777a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 03:15:55, skipping insertion in model container [2020-10-09 15:15:55,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:54" (2/3) ... [2020-10-09 15:15:55,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7777a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 03:15:55, skipping insertion in model container [2020-10-09 15:15:55,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 03:15:55" (3/3) ... [2020-10-09 15:15:55,665 INFO L111 eAbstractionObserver]: Analyzing ICFG 19_time_var_mutex.i [2020-10-09 15:15:55,677 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 15:15:55,686 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-09 15:15:55,687 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 15:15:55,711 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,712 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,712 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,712 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,713 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,713 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,713 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#in~m.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,714 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,714 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,714 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,714 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#in~m.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,715 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,715 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,715 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#in~m.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,715 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,716 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,716 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,716 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#in~m.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,717 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#in~m.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,717 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_release_~m.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,717 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#in~m.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,717 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_release_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,717 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,718 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,720 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,721 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#in~m.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,721 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_release_~m.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,721 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#in~m.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,721 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_release_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,722 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,722 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,722 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,722 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,723 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,726 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#in~m.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#in~m.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#in~m.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,729 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_release_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,730 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_release_#in~m.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,730 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,730 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_release_~m.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,730 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:55,749 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 15:15:55,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 15:15:55,771 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 15:15:55,772 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 15:15:55,772 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 15:15:55,772 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 15:15:55,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 15:15:55,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 15:15:55,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 15:15:55,786 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 54 places, 54 transitions, 113 flow [2020-10-09 15:15:55,820 INFO L129 PetriNetUnfolder]: 4/53 cut-off events. [2020-10-09 15:15:55,820 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:55,825 INFO L80 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 53 events. 4/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2020-10-09 15:15:55,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 54 transitions, 113 flow [2020-10-09 15:15:55,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 53 transitions, 109 flow [2020-10-09 15:15:55,843 INFO L129 PetriNetUnfolder]: 2/33 cut-off events. [2020-10-09 15:15:55,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:55,843 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:55,844 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 15:15:55,845 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash -831141329, now seen corresponding path program 1 times [2020-10-09 15:15:55,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:55,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818577635] [2020-10-09 15:15:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 15:15:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 15:15:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:56,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:56,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818577635] [2020-10-09 15:15:56,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:56,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:56,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212319614] [2020-10-09 15:15:56,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:56,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:56,070 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 54 [2020-10-09 15:15:56,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 109 flow. Second operand 3 states. [2020-10-09 15:15:56,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:56,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 54 [2020-10-09 15:15:56,073 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:56,096 INFO L129 PetriNetUnfolder]: 1/50 cut-off events. [2020-10-09 15:15:56,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:56,097 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 50 events. 1/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 3/50 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2020-10-09 15:15:56,098 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 1 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2020-10-09 15:15:56,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 109 flow [2020-10-09 15:15:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2020-10-09 15:15:56,114 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9320987654320988 [2020-10-09 15:15:56,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2020-10-09 15:15:56,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2020-10-09 15:15:56,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:56,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2020-10-09 15:15:56,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:56,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:56,130 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:56,132 INFO L185 Difference]: Start difference. First operand has 53 places, 53 transitions, 109 flow. Second operand 3 states and 151 transitions. [2020-10-09 15:15:56,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 109 flow [2020-10-09 15:15:56,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 15:15:56,141 INFO L241 Difference]: Finished difference. Result has 54 places, 50 transitions, 106 flow [2020-10-09 15:15:56,144 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2020-10-09 15:15:56,145 INFO L341 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2020-10-09 15:15:56,146 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 106 flow [2020-10-09 15:15:56,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:56,146 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:56,146 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 15:15:56,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 15:15:56,360 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1987444989, now seen corresponding path program 1 times [2020-10-09 15:15:56,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:56,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867343429] [2020-10-09 15:15:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 15:15:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 15:15:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:56,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:56,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867343429] [2020-10-09 15:15:56,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:56,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:56,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861424963] [2020-10-09 15:15:56,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:56,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:56,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:56,511 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 54 [2020-10-09 15:15:56,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 106 flow. Second operand 3 states. [2020-10-09 15:15:56,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:56,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 54 [2020-10-09 15:15:56,512 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:56,553 INFO L129 PetriNetUnfolder]: 4/84 cut-off events. [2020-10-09 15:15:56,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:56,554 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 84 events. 4/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 1 based on Foata normal form. 2/83 useless extension candidates. Maximal degree in co-relation 85. Up to 9 conditions per place. [2020-10-09 15:15:56,555 INFO L132 encePairwiseOnDemand]: 48/54 looper letters, 4 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2020-10-09 15:15:56,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 126 flow [2020-10-09 15:15:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2020-10-09 15:15:56,563 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9135802469135802 [2020-10-09 15:15:56,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2020-10-09 15:15:56,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2020-10-09 15:15:56,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:56,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2020-10-09 15:15:56,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:56,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:56,572 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:56,572 INFO L185 Difference]: Start difference. First operand has 54 places, 50 transitions, 106 flow. Second operand 3 states and 148 transitions. [2020-10-09 15:15:56,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 126 flow [2020-10-09 15:15:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 15:15:56,579 INFO L241 Difference]: Finished difference. Result has 56 places, 52 transitions, 130 flow [2020-10-09 15:15:56,579 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2020-10-09 15:15:56,580 INFO L341 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2020-10-09 15:15:56,580 INFO L481 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 130 flow [2020-10-09 15:15:56,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:56,581 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:56,581 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 15:15:56,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 15:15:56,802 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 254872362, now seen corresponding path program 1 times [2020-10-09 15:15:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:56,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910339119] [2020-10-09 15:15:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 15:15:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 15:15:56,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:56,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910339119] [2020-10-09 15:15:56,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:56,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:56,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125194892] [2020-10-09 15:15:56,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:56,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:56,897 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 54 [2020-10-09 15:15:56,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 130 flow. Second operand 3 states. [2020-10-09 15:15:56,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:56,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 54 [2020-10-09 15:15:56,897 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:56,920 INFO L129 PetriNetUnfolder]: 3/83 cut-off events. [2020-10-09 15:15:56,921 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-10-09 15:15:56,921 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 83 events. 3/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 2 based on Foata normal form. 4/86 useless extension candidates. Maximal degree in co-relation 100. Up to 11 conditions per place. [2020-10-09 15:15:56,922 INFO L132 encePairwiseOnDemand]: 50/54 looper letters, 5 selfloop transitions, 2 changer transitions 1/51 dead transitions. [2020-10-09 15:15:56,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 138 flow [2020-10-09 15:15:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2020-10-09 15:15:56,923 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9074074074074074 [2020-10-09 15:15:56,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2020-10-09 15:15:56,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2020-10-09 15:15:56,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:56,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2020-10-09 15:15:56,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:56,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:56,925 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:56,926 INFO L185 Difference]: Start difference. First operand has 56 places, 52 transitions, 130 flow. Second operand 3 states and 147 transitions. [2020-10-09 15:15:56,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 138 flow [2020-10-09 15:15:56,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 15:15:56,928 INFO L241 Difference]: Finished difference. Result has 57 places, 50 transitions, 124 flow [2020-10-09 15:15:56,929 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2020-10-09 15:15:56,929 INFO L341 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2020-10-09 15:15:56,929 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 124 flow [2020-10-09 15:15:56,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:56,929 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:56,929 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 15:15:57,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 15:15:57,141 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:57,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1067565549, now seen corresponding path program 1 times [2020-10-09 15:15:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:57,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714781622] [2020-10-09 15:15:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 15:15:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 15:15:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:57,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:57,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714781622] [2020-10-09 15:15:57,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:57,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:57,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137857679] [2020-10-09 15:15:57,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:57,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:57,274 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 54 [2020-10-09 15:15:57,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 124 flow. Second operand 3 states. [2020-10-09 15:15:57,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:57,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 54 [2020-10-09 15:15:57,275 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:57,292 INFO L129 PetriNetUnfolder]: 1/92 cut-off events. [2020-10-09 15:15:57,293 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2020-10-09 15:15:57,293 INFO L80 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 92 events. 1/92 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 1 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 106. Up to 12 conditions per place. [2020-10-09 15:15:57,294 INFO L132 encePairwiseOnDemand]: 52/54 looper letters, 2 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2020-10-09 15:15:57,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 130 flow [2020-10-09 15:15:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2020-10-09 15:15:57,295 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9320987654320988 [2020-10-09 15:15:57,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2020-10-09 15:15:57,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2020-10-09 15:15:57,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:57,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2020-10-09 15:15:57,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:57,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:57,297 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:57,297 INFO L185 Difference]: Start difference. First operand has 57 places, 50 transitions, 124 flow. Second operand 3 states and 151 transitions. [2020-10-09 15:15:57,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 130 flow [2020-10-09 15:15:57,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 15:15:57,300 INFO L241 Difference]: Finished difference. Result has 59 places, 50 transitions, 127 flow [2020-10-09 15:15:57,300 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2020-10-09 15:15:57,301 INFO L341 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2020-10-09 15:15:57,301 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 127 flow [2020-10-09 15:15:57,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:57,301 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:57,301 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 15:15:57,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 15:15:57,512 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:57,513 INFO L82 PathProgramCache]: Analyzing trace with hash 598011937, now seen corresponding path program 2 times [2020-10-09 15:15:57,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:57,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886757287] [2020-10-09 15:15:57,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 15:15:57,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 15:15:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 15:15:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-09 15:15:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:57,630 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-10-09 15:15:57,630 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,637 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 15:15:57,637 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-09 15:15:57,660 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 15:15:57,661 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-09 15:15:57,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 15:15:57,669 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,674 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 15:15:57,674 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2020-10-09 15:15:57,693 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 [2020-10-09 15:15:57,694 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,700 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 15:15:57,701 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,701 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-09 15:15:57,732 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-09 15:15:57,733 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 15:15:57,741 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 15:15:57,745 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. [2020-10-09 15:15:57,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-10-09 15:15:57,776 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:57,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:57,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-09 15:15:57,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 15:15:58,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.offset_9 Int)) (not (= (select (select (store |c_#memory_int| |c_~#m_inode~0.base| (store (select |c_#memory_int| |c_~#m_inode~0.base|) v_thr1Thread1of1ForFork0___VERIFIER_atomic_acquire_~m.offset_9 1)) |c_~#m_busy~0.base|) |c_~#m_busy~0.offset|) 0))) is different from false [2020-10-09 15:15:58,869 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 15:15:58,870 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 15:15:58,870 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 15:15:58,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:1 [2020-10-09 15:15:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 15:15:58,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886757287] [2020-10-09 15:15:58,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:58,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2020-10-09 15:15:58,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146018823] [2020-10-09 15:15:58,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 15:15:58,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 15:15:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2020-10-09 15:15:58,999 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2020-10-09 15:15:59,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 127 flow. Second operand 8 states. [2020-10-09 15:15:59,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:59,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2020-10-09 15:15:59,000 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:59,689 INFO L129 PetriNetUnfolder]: 7/87 cut-off events. [2020-10-09 15:15:59,689 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 15:15:59,690 INFO L80 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 87 events. 7/87 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 193 event pairs, 1 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 112. Up to 13 conditions per place. [2020-10-09 15:15:59,690 INFO L132 encePairwiseOnDemand]: 46/54 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2020-10-09 15:15:59,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 169 flow [2020-10-09 15:15:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 15:15:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 15:15:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 329 transitions. [2020-10-09 15:15:59,692 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7615740740740741 [2020-10-09 15:15:59,693 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 329 transitions. [2020-10-09 15:15:59,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 329 transitions. [2020-10-09 15:15:59,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:59,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 329 transitions. [2020-10-09 15:15:59,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 15:15:59,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 15:15:59,695 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 15:15:59,696 INFO L185 Difference]: Start difference. First operand has 59 places, 50 transitions, 127 flow. Second operand 8 states and 329 transitions. [2020-10-09 15:15:59,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 169 flow [2020-10-09 15:15:59,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 157 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-09 15:15:59,698 INFO L241 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2020-10-09 15:15:59,698 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2020-10-09 15:15:59,698 INFO L341 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2020-10-09 15:15:59,698 INFO L481 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2020-10-09 15:15:59,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 15:15:59,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 15:15:59,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 03:15:59 BasicIcfg [2020-10-09 15:15:59,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 15:15:59,921 INFO L168 Benchmark]: Toolchain (without parser) took 5932.21 ms. Allocated memory was 250.6 MB in the beginning and 370.7 MB in the end (delta: 120.1 MB). Free memory was 202.8 MB in the beginning and 317.2 MB in the end (delta: -114.4 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:59,922 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 250.6 MB. Free memory is still 224.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 15:15:59,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.74 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 202.8 MB in the beginning and 265.2 MB in the end (delta: -62.4 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:59,925 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.29 ms. Allocated memory is still 312.0 MB. Free memory was 265.2 MB in the beginning and 262.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:59,925 INFO L168 Benchmark]: Boogie Preprocessor took 28.49 ms. Allocated memory is still 312.0 MB. Free memory was 262.6 MB in the beginning and 260.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:59,926 INFO L168 Benchmark]: RCFGBuilder took 839.62 ms. Allocated memory is still 312.0 MB. Free memory was 260.1 MB in the beginning and 190.0 MB in the end (delta: 70.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:59,927 INFO L168 Benchmark]: TraceAbstraction took 4262.89 ms. Allocated memory was 312.0 MB in the beginning and 370.7 MB in the end (delta: 58.7 MB). Free memory was 190.0 MB in the beginning and 317.2 MB in the end (delta: -127.2 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 15:15:59,933 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 250.6 MB. Free memory is still 224.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 729.74 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 202.8 MB in the beginning and 265.2 MB in the end (delta: -62.4 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 66.29 ms. Allocated memory is still 312.0 MB. Free memory was 265.2 MB in the beginning and 262.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.49 ms. Allocated memory is still 312.0 MB. Free memory was 262.6 MB in the beginning and 260.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 839.62 ms. Allocated memory is still 312.0 MB. Free memory was 260.1 MB in the beginning and 190.0 MB in the end (delta: 70.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4262.89 ms. Allocated memory was 312.0 MB in the beginning and 370.7 MB in the end (delta: 58.7 MB). Free memory was 190.0 MB in the beginning and 317.2 MB in the end (delta: -127.2 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 702]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 711]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 51 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 32 SDslu, 12 SDs, 0 SdLazy, 75 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 264 ConstructedInterpolants, 6 QuantifiedInterpolants, 18208 SizeOfPredicates, 19 NumberOfNonLiveVariables, 535 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...