/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-atomic/peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 16:57:56,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 16:57:56,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 16:57:56,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 16:57:56,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 16:57:56,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 16:57:56,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 16:57:56,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 16:57:56,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 16:57:56,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 16:57:56,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 16:57:56,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 16:57:56,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 16:57:56,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 16:57:56,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 16:57:56,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 16:57:56,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 16:57:56,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 16:57:56,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 16:57:56,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 16:57:56,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 16:57:56,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 16:57:56,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 16:57:56,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 16:57:56,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 16:57:56,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 16:57:56,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 16:57:56,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 16:57:56,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 16:57:56,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 16:57:56,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 16:57:56,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 16:57:56,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 16:57:56,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 16:57:56,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 16:57:56,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 16:57:56,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 16:57:56,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 16:57:56,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 16:57:56,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 16:57:56,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 16:57:56,855 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 16:57:56,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 16:57:56,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 16:57:56,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 16:57:56,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 16:57:56,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 16:57:56,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 16:57:56,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 16:57:56,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 16:57:56,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 16:57:56,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 16:57:56,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 16:57:56,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 16:57:56,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 16:57:56,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 16:57:56,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 16:57:56,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 16:57:56,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:57:56,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 16:57:56,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 16:57:56,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 16:57:56,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 16:57:56,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 16:57:56,860 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 16:57:56,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 16:57:56,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 16:57:57,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 16:57:57,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 16:57:57,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 16:57:57,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 16:57:57,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 16:57:57,148 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2020-10-11 16:57:57,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a46c506/d5f70efcdb3c454d8def49f5afd06315/FLAGc54ec29b0 [2020-10-11 16:57:57,751 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 16:57:57,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2020-10-11 16:57:57,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a46c506/d5f70efcdb3c454d8def49f5afd06315/FLAGc54ec29b0 [2020-10-11 16:57:58,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a46c506/d5f70efcdb3c454d8def49f5afd06315 [2020-10-11 16:57:58,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 16:57:58,050 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 16:57:58,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 16:57:58,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 16:57:58,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 16:57:58,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20075267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58, skipping insertion in model container [2020-10-11 16:57:58,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 16:57:58,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 16:57:58,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:57:58,554 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 16:57:58,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:57:58,724 INFO L208 MainTranslator]: Completed translation [2020-10-11 16:57:58,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58 WrapperNode [2020-10-11 16:57:58,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 16:57:58,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 16:57:58,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 16:57:58,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 16:57:58,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 16:57:58,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 16:57:58,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 16:57:58,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 16:57:58,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... [2020-10-11 16:57:58,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 16:57:58,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 16:57:58,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 16:57:58,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 16:57:58,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:57:58,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 16:57:58,879 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-10-11 16:57:58,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-10-11 16:57:58,880 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-11 16:57:58,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-11 16:57:58,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 16:57:58,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 16:57:58,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 16:57:58,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 16:57:58,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 16:57:58,885 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 16:57:59,295 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 16:57:59,295 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 16:57:59,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:57:59 BoogieIcfgContainer [2020-10-11 16:57:59,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 16:57:59,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 16:57:59,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 16:57:59,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 16:57:59,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 04:57:58" (1/3) ... [2020-10-11 16:57:59,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3173db52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:57:59, skipping insertion in model container [2020-10-11 16:57:59,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:57:58" (2/3) ... [2020-10-11 16:57:59,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3173db52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:57:59, skipping insertion in model container [2020-10-11 16:57:59,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:57:59" (3/3) ... [2020-10-11 16:57:59,306 INFO L111 eAbstractionObserver]: Analyzing ICFG peterson.i [2020-10-11 16:57:59,318 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 16:57:59,325 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-11 16:57:59,326 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 16:57:59,350 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,350 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,351 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,351 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,352 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,352 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,353 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,353 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,353 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,353 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,354 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,354 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,358 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,358 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,359 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,359 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,365 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,365 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,366 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,366 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:57:59,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-11 16:57:59,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:57:59,411 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:57:59,411 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:57:59,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:57:59,411 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:57:59,412 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:57:59,412 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:57:59,412 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:57:59,425 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 62 transitions, 146 flow [2020-10-11 16:57:59,464 INFO L129 PetriNetUnfolder]: 7/62 cut-off events. [2020-10-11 16:57:59,464 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-11 16:57:59,469 INFO L80 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 62 events. 7/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 39. Up to 3 conditions per place. [2020-10-11 16:57:59,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 62 transitions, 146 flow [2020-10-11 16:57:59,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 50 transitions, 112 flow [2020-10-11 16:57:59,487 INFO L129 PetriNetUnfolder]: 5/33 cut-off events. [2020-10-11 16:57:59,487 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:57:59,487 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:59,488 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] [2020-10-11 16:57:59,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1574270369, now seen corresponding path program 1 times [2020-10-11 16:57:59,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:59,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143929232] [2020-10-11 16:57:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143929232] [2020-10-11 16:57:59,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:57:59,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:57:59,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466375722] [2020-10-11 16:57:59,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:57:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:57:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:57:59,720 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 62 [2020-10-11 16:57:59,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 112 flow. Second operand 2 states. [2020-10-11 16:57:59,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:59,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 62 [2020-10-11 16:57:59,724 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:59,746 INFO L129 PetriNetUnfolder]: 2/48 cut-off events. [2020-10-11 16:57:59,746 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-11 16:57:59,747 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 48 events. 2/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 4/48 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-11 16:57:59,749 INFO L132 encePairwiseOnDemand]: 58/62 looper letters, 0 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2020-10-11 16:57:59,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 104 flow [2020-10-11 16:57:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:57:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:57:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 120 transitions. [2020-10-11 16:57:59,763 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.967741935483871 [2020-10-11 16:57:59,763 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 120 transitions. [2020-10-11 16:57:59,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 120 transitions. [2020-10-11 16:57:59,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:59,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 120 transitions. [2020-10-11 16:57:59,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:57:59,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:57:59,777 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:57:59,779 INFO L185 Difference]: Start difference. First operand has 50 places, 50 transitions, 112 flow. Second operand 2 states and 120 transitions. [2020-10-11 16:57:59,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 104 flow [2020-10-11 16:57:59,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-11 16:57:59,789 INFO L241 Difference]: Finished difference. Result has 47 places, 46 transitions, 96 flow [2020-10-11 16:57:59,791 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2020-10-11 16:57:59,792 INFO L341 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2020-10-11 16:57:59,793 INFO L481 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 96 flow [2020-10-11 16:57:59,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:57:59,793 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:59,793 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] [2020-10-11 16:57:59,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 16:57:59,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1574240578, now seen corresponding path program 1 times [2020-10-11 16:57:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:59,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301252710] [2020-10-11 16:57:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301252710] [2020-10-11 16:57:59,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:57:59,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 16:57:59,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43714551] [2020-10-11 16:57:59,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 16:57:59,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:59,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 16:57:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 16:57:59,959 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 62 [2020-10-11 16:57:59,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 96 flow. Second operand 3 states. [2020-10-11 16:57:59,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:59,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 62 [2020-10-11 16:57:59,960 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:59,991 INFO L129 PetriNetUnfolder]: 3/77 cut-off events. [2020-10-11 16:57:59,991 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:57:59,992 INFO L80 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 77 events. 3/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 189 event pairs, 1 based on Foata normal form. 4/78 useless extension candidates. Maximal degree in co-relation 90. Up to 8 conditions per place. [2020-10-11 16:57:59,993 INFO L132 encePairwiseOnDemand]: 57/62 looper letters, 3 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2020-10-11 16:57:59,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 110 flow [2020-10-11 16:57:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 16:57:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 16:57:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2020-10-11 16:57:59,996 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8978494623655914 [2020-10-11 16:57:59,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2020-10-11 16:57:59,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2020-10-11 16:57:59,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:59,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2020-10-11 16:57:59,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 16:58:00,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 16:58:00,001 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 16:58:00,001 INFO L185 Difference]: Start difference. First operand has 47 places, 46 transitions, 96 flow. Second operand 3 states and 167 transitions. [2020-10-11 16:58:00,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 110 flow [2020-10-11 16:58:00,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:58:00,006 INFO L241 Difference]: Finished difference. Result has 51 places, 47 transitions, 116 flow [2020-10-11 16:58:00,007 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2020-10-11 16:58:00,008 INFO L341 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2020-10-11 16:58:00,008 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 116 flow [2020-10-11 16:58:00,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 16:58:00,008 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:00,008 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] [2020-10-11 16:58:00,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 16:58:00,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -145909775, now seen corresponding path program 1 times [2020-10-11 16:58:00,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:00,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696292397] [2020-10-11 16:58:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:00,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696292397] [2020-10-11 16:58:00,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:58:00,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 16:58:00,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565057452] [2020-10-11 16:58:00,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 16:58:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 16:58:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 16:58:00,126 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 62 [2020-10-11 16:58:00,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 116 flow. Second operand 3 states. [2020-10-11 16:58:00,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:00,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 62 [2020-10-11 16:58:00,127 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:00,156 INFO L129 PetriNetUnfolder]: 4/86 cut-off events. [2020-10-11 16:58:00,157 INFO L130 PetriNetUnfolder]: For 16/19 co-relation queries the response was YES. [2020-10-11 16:58:00,158 INFO L80 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 86 events. 4/86 cut-off events. For 16/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 252 event pairs, 2 based on Foata normal form. 4/86 useless extension candidates. Maximal degree in co-relation 120. Up to 11 conditions per place. [2020-10-11 16:58:00,159 INFO L132 encePairwiseOnDemand]: 58/62 looper letters, 4 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2020-10-11 16:58:00,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 128 flow [2020-10-11 16:58:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 16:58:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 16:58:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2020-10-11 16:58:00,163 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8978494623655914 [2020-10-11 16:58:00,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2020-10-11 16:58:00,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2020-10-11 16:58:00,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:00,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2020-10-11 16:58:00,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 16:58:00,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 16:58:00,168 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 16:58:00,169 INFO L185 Difference]: Start difference. First operand has 51 places, 47 transitions, 116 flow. Second operand 3 states and 167 transitions. [2020-10-11 16:58:00,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 128 flow [2020-10-11 16:58:00,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:58:00,174 INFO L241 Difference]: Finished difference. Result has 52 places, 47 transitions, 120 flow [2020-10-11 16:58:00,175 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2020-10-11 16:58:00,175 INFO L341 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2020-10-11 16:58:00,175 INFO L481 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 120 flow [2020-10-11 16:58:00,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 16:58:00,175 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:00,176 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] [2020-10-11 16:58:00,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 16:58:00,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:00,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1952726074, now seen corresponding path program 1 times [2020-10-11 16:58:00,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:00,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17408282] [2020-10-11 16:58:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17408282] [2020-10-11 16:58:00,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:58:00,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:58:00,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607526554] [2020-10-11 16:58:00,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:58:00,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:58:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:58:00,354 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 62 [2020-10-11 16:58:00,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 120 flow. Second operand 4 states. [2020-10-11 16:58:00,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:00,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 62 [2020-10-11 16:58:00,355 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:00,477 INFO L129 PetriNetUnfolder]: 18/129 cut-off events. [2020-10-11 16:58:00,477 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-10-11 16:58:00,478 INFO L80 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 129 events. 18/129 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 449 event pairs, 2 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 199. Up to 13 conditions per place. [2020-10-11 16:58:00,479 INFO L132 encePairwiseOnDemand]: 55/62 looper letters, 9 selfloop transitions, 6 changer transitions 1/54 dead transitions. [2020-10-11 16:58:00,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 166 flow [2020-10-11 16:58:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:58:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:58:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2020-10-11 16:58:00,485 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8629032258064516 [2020-10-11 16:58:00,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 214 transitions. [2020-10-11 16:58:00,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 214 transitions. [2020-10-11 16:58:00,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:00,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 214 transitions. [2020-10-11 16:58:00,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:58:00,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:58:00,491 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:58:00,491 INFO L185 Difference]: Start difference. First operand has 52 places, 47 transitions, 120 flow. Second operand 4 states and 214 transitions. [2020-10-11 16:58:00,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 166 flow [2020-10-11 16:58:00,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 16:58:00,496 INFO L241 Difference]: Finished difference. Result has 57 places, 52 transitions, 164 flow [2020-10-11 16:58:00,497 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2020-10-11 16:58:00,497 INFO L341 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2020-10-11 16:58:00,497 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 164 flow [2020-10-11 16:58:00,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:58:00,497 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:00,498 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] [2020-10-11 16:58:00,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 16:58:00,498 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:00,499 INFO L82 PathProgramCache]: Analyzing trace with hash -749029440, now seen corresponding path program 2 times [2020-10-11 16:58:00,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:00,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692584744] [2020-10-11 16:58:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692584744] [2020-10-11 16:58:00,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:58:00,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:58:00,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878647391] [2020-10-11 16:58:00,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:58:00,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:58:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:58:00,640 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 62 [2020-10-11 16:58:00,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 164 flow. Second operand 4 states. [2020-10-11 16:58:00,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:00,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 62 [2020-10-11 16:58:00,641 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:00,673 INFO L129 PetriNetUnfolder]: 20/97 cut-off events. [2020-10-11 16:58:00,673 INFO L130 PetriNetUnfolder]: For 26/27 co-relation queries the response was YES. [2020-10-11 16:58:00,674 INFO L80 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 97 events. 20/97 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 226 event pairs, 1 based on Foata normal form. 5/99 useless extension candidates. Maximal degree in co-relation 203. Up to 19 conditions per place. [2020-10-11 16:58:00,675 INFO L132 encePairwiseOnDemand]: 55/62 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2020-10-11 16:58:00,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 216 flow [2020-10-11 16:58:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:58:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:58:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2020-10-11 16:58:00,678 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8629032258064516 [2020-10-11 16:58:00,678 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 214 transitions. [2020-10-11 16:58:00,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 214 transitions. [2020-10-11 16:58:00,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:00,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 214 transitions. [2020-10-11 16:58:00,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:58:00,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:58:00,681 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:58:00,681 INFO L185 Difference]: Start difference. First operand has 57 places, 52 transitions, 164 flow. Second operand 4 states and 214 transitions. [2020-10-11 16:58:00,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 216 flow [2020-10-11 16:58:00,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 208 flow, removed 3 selfloop flow, removed 1 redundant places. [2020-10-11 16:58:00,684 INFO L241 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2020-10-11 16:58:00,685 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2020-10-11 16:58:00,685 INFO L341 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2020-10-11 16:58:00,685 INFO L481 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2020-10-11 16:58:00,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:58:00,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 16:58:00,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 04:58:00 BasicIcfg [2020-10-11 16:58:00,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 16:58:00,695 INFO L168 Benchmark]: Toolchain (without parser) took 2643.93 ms. Allocated memory was 251.1 MB in the beginning and 358.6 MB in the end (delta: 107.5 MB). Free memory was 206.1 MB in the beginning and 295.6 MB in the end (delta: -89.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 14.2 GB. [2020-10-11 16:58:00,695 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:58:00,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.50 ms. Allocated memory was 251.1 MB in the beginning and 313.0 MB in the end (delta: 61.9 MB). Free memory was 206.1 MB in the beginning and 270.8 MB in the end (delta: -64.7 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. [2020-10-11 16:58:00,697 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.01 ms. Allocated memory is still 313.0 MB. Free memory was 270.8 MB in the beginning and 268.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 16:58:00,698 INFO L168 Benchmark]: Boogie Preprocessor took 27.28 ms. Allocated memory is still 313.0 MB. Free memory was 268.2 MB in the beginning and 265.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 16:58:00,699 INFO L168 Benchmark]: RCFGBuilder took 494.14 ms. Allocated memory is still 313.0 MB. Free memory was 265.7 MB in the beginning and 246.4 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-11 16:58:00,700 INFO L168 Benchmark]: TraceAbstraction took 1393.14 ms. Allocated memory was 313.0 MB in the beginning and 358.6 MB in the end (delta: 45.6 MB). Free memory was 246.4 MB in the beginning and 295.6 MB in the end (delta: -49.2 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:58:00,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 671.50 ms. Allocated memory was 251.1 MB in the beginning and 313.0 MB in the end (delta: 61.9 MB). Free memory was 206.1 MB in the beginning and 270.8 MB in the end (delta: -64.7 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 50.01 ms. Allocated memory is still 313.0 MB. Free memory was 270.8 MB in the beginning and 268.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.28 ms. Allocated memory is still 313.0 MB. Free memory was 268.2 MB in the beginning and 265.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 494.14 ms. Allocated memory is still 313.0 MB. Free memory was 265.7 MB in the beginning and 246.4 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1393.14 ms. Allocated memory was 313.0 MB in the beginning and 358.6 MB in the end (delta: 45.6 MB). Free memory was 246.4 MB in the beginning and 295.6 MB in the end (delta: -49.2 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 690]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 681]: 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 3 procedures, 55 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: 1.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 27 SDslu, 8 SDs, 0 SdLazy, 47 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=4, 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 3826 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...