/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:22:16,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:22:16,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:22:16,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 14:22:16,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 14:22:16,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 14:22:16,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 14:22:16,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 14:22:16,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 14:22:16,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 14:22:16,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 14:22:16,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 14:22:16,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 14:22:16,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 14:22:16,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 14:22:16,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 14:22:16,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 14:22:16,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 14:22:16,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 14:22:16,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 14:22:16,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 14:22:16,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 14:22:16,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 14:22:16,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 14:22:16,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 14:22:16,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 14:22:16,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 14:22:16,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 14:22:16,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 14:22:16,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 14:22:16,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 14:22:16,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 14:22:16,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 14:22:16,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 14:22:16,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 14:22:16,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 14:22:16,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 14:22:16,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:22:16,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:22:16,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:22:16,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:22:16,738 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:22:16,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:22:16,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:22:16,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:22:16,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:22:16,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:22:16,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:22:16,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:22:16,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:22:16,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:22:16,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:22:16,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:22:16,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:22:16,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-10 14:22:16,981 INFO L275 PluginConnector]: CDTParser initialized [2021-06-10 14:22:16,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c [2021-06-10 14:22:17,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d496a9b/44584a353ce748f3a1af63bb6bacd93a/FLAG3274fbc92 [2021-06-10 14:22:17,370 INFO L306 CDTParser]: Found 1 translation units. [2021-06-10 14:22:17,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c [2021-06-10 14:22:17,371 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-10 14:22:17,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d496a9b/44584a353ce748f3a1af63bb6bacd93a/FLAG3274fbc92 [2021-06-10 14:22:17,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d496a9b/44584a353ce748f3a1af63bb6bacd93a [2021-06-10 14:22:17,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:22:17,793 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-10 14:22:17,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-10 14:22:17,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-10 14:22:17,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-10 14:22:17,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c18cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17, skipping insertion in model container [2021-06-10 14:22:17,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-10 14:22:17,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-10 14:22:17,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-10 14:22:17,915 INFO L203 MainTranslator]: Completed pre-run [2021-06-10 14:22:17,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-10 14:22:17,939 INFO L208 MainTranslator]: Completed translation [2021-06-10 14:22:17,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17 WrapperNode [2021-06-10 14:22:17,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-10 14:22:17,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:22:17,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:22:17,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:22:17,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:22:17,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:22:17,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:22:17,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:22:17,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (1/1) ... [2021-06-10 14:22:17,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:22:17,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:22:17,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:22:17,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:22:17,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (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 [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-10 14:22:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:22:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-10 14:22:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-10 14:22:18,013 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 14:22:18,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:22:18,142 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-10 14:22:18,143 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: fooEXIT is neither atomic block end nor error location. [2021-06-10 14:22:18,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:22:18 BoogieIcfgContainer [2021-06-10 14:22:18,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:22:18,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:22:18,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:22:18,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:22:18,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.06 02:22:17" (1/3) ... [2021-06-10 14:22:18,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae82f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:22:18, skipping insertion in model container [2021-06-10 14:22:18,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:22:17" (2/3) ... [2021-06-10 14:22:18,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae82f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:22:18, skipping insertion in model container [2021-06-10 14:22:18,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:22:18" (3/3) ... [2021-06-10 14:22:18,149 INFO L111 eAbstractionObserver]: Analyzing ICFG 07-return-before-end.c [2021-06-10 14:22:18,152 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:22:18,154 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:22:18,155 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:22:18,179 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,179 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,179 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,179 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,179 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,180 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,181 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,181 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,181 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,182 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,182 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,182 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,182 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 14:22:18,190 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:22:18,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:22:18,242 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:22:18,243 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:22:18,243 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:22:18,243 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:22:18,243 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:22:18,243 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:22:18,243 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:22:18,243 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:22:18,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 51 flow [2021-06-10 14:22:18,274 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-06-10 14:22:18,275 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:22:18,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 1/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2021-06-10 14:22:18,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 51 flow [2021-06-10 14:22:18,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 22 transitions, 47 flow [2021-06-10 14:22:18,289 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-06-10 14:22:18,289 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:22:18,289 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:22:18,290 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:22:18,290 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:22:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:22:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1918863577, now seen corresponding path program 1 times [2021-06-10 14:22:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:22:18,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47763275] [2021-06-10 14:22:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:22:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:22:18,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:22:18,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:22:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:22:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47763275] [2021-06-10 14:22:18,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:22:18,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-10 14:22:18,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30854299] [2021-06-10 14:22:18,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:22:18,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:22:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:22:18,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:22:18,471 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 23 [2021-06-10 14:22:18,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:22:18,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 23 [2021-06-10 14:22:18,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:22:18,516 INFO L129 PetriNetUnfolder]: 2/27 cut-off events. [2021-06-10 14:22:18,517 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:22:18,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 27 events. 2/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 33 event pairs, 1 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 25. Up to 5 conditions per place. [2021-06-10 14:22:18,518 INFO L132 encePairwiseOnDemand]: 20/23 looper letters, 1 selfloop transitions, 2 changer transitions 8/23 dead transitions. [2021-06-10 14:22:18,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 61 flow [2021-06-10 14:22:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:22:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:22:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2021-06-10 14:22:18,526 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8840579710144928 [2021-06-10 14:22:18,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2021-06-10 14:22:18,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2021-06-10 14:22:18,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:22:18,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2021-06-10 14:22:18,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,534 INFO L185 Difference]: Start difference. First operand has 25 places, 22 transitions, 47 flow. Second operand 3 states and 61 transitions. [2021-06-10 14:22:18,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 61 flow [2021-06-10 14:22:18,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 60 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:22:18,538 INFO L241 Difference]: Finished difference. Result has 27 places, 15 transitions, 40 flow [2021-06-10 14:22:18,539 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=27, PETRI_TRANSITIONS=15} [2021-06-10 14:22:18,540 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2021-06-10 14:22:18,540 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 15 transitions, 40 flow [2021-06-10 14:22:18,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,540 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:22:18,541 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:22:18,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:22:18,541 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:22:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:22:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1498181559, now seen corresponding path program 1 times [2021-06-10 14:22:18,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:22:18,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681824298] [2021-06-10 14:22:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:22:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:22:18,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:22:18,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:22:18,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:22:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:22:18,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681824298] [2021-06-10 14:22:18,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:22:18,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:22:18,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669630719] [2021-06-10 14:22:18,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 14:22:18,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:22:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 14:22:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 14:22:18,606 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 23 [2021-06-10 14:22:18,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 15 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:22:18,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 23 [2021-06-10 14:22:18,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:22:18,633 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-06-10 14:22:18,633 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-10 14:22:18,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 17 events. 0/17 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 14:22:18,633 INFO L132 encePairwiseOnDemand]: 18/23 looper letters, 1 selfloop transitions, 4 changer transitions 1/16 dead transitions. [2021-06-10 14:22:18,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 57 flow [2021-06-10 14:22:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 14:22:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 14:22:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2021-06-10 14:22:18,636 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2021-06-10 14:22:18,636 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 71 transitions. [2021-06-10 14:22:18,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 71 transitions. [2021-06-10 14:22:18,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:22:18,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 71 transitions. [2021-06-10 14:22:18,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,641 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,641 INFO L185 Difference]: Start difference. First operand has 27 places, 15 transitions, 40 flow. Second operand 4 states and 71 transitions. [2021-06-10 14:22:18,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 57 flow [2021-06-10 14:22:18,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 51 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 14:22:18,642 INFO L241 Difference]: Finished difference. Result has 23 places, 15 transitions, 50 flow [2021-06-10 14:22:18,642 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2021-06-10 14:22:18,643 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2021-06-10 14:22:18,643 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 50 flow [2021-06-10 14:22:18,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,643 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:22:18,643 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:22:18,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:22:18,644 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:22:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:22:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1486932279, now seen corresponding path program 2 times [2021-06-10 14:22:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:22:18,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883050091] [2021-06-10 14:22:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:22:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:22:18,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:22:18,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:22:18,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:22:18,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:22:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:22:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883050091] [2021-06-10 14:22:18,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:22:18,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:22:18,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749513243] [2021-06-10 14:22:18,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:22:18,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:22:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:22:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:22:18,669 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 23 [2021-06-10 14:22:18,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:22:18,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 23 [2021-06-10 14:22:18,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:22:18,673 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-10 14:22:18,673 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-10 14:22:18,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 13 events. 0/13 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:22:18,673 INFO L132 encePairwiseOnDemand]: 21/23 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-10 14:22:18,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 42 flow [2021-06-10 14:22:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:22:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:22:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2021-06-10 14:22:18,674 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8695652173913043 [2021-06-10 14:22:18,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2021-06-10 14:22:18,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2021-06-10 14:22:18,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:22:18,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2021-06-10 14:22:18,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,676 INFO L185 Difference]: Start difference. First operand has 23 places, 15 transitions, 50 flow. Second operand 3 states and 60 transitions. [2021-06-10 14:22:18,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 42 flow [2021-06-10 14:22:18,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 32 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-10 14:22:18,677 INFO L241 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2021-06-10 14:22:18,677 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2021-06-10 14:22:18,677 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, -7 predicate places. [2021-06-10 14:22:18,677 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2021-06-10 14:22:18,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:22:18,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 14:22:18,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:22:18 BasicIcfg [2021-06-10 14:22:18,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:22:18,682 INFO L168 Benchmark]: Toolchain (without parser) took 888.11 ms. Allocated memory is still 373.3 MB. Free memory was 335.2 MB in the beginning and 298.8 MB in the end (delta: 36.4 MB). Peak memory consumption was 36.3 MB. Max. memory is 16.0 GB. [2021-06-10 14:22:18,683 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 373.3 MB. Free memory was 353.6 MB in the beginning and 353.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:22:18,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.87 ms. Allocated memory is still 373.3 MB. Free memory was 334.9 MB in the beginning and 356.4 MB in the end (delta: -21.5 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:22:18,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.28 ms. Allocated memory is still 373.3 MB. Free memory was 356.4 MB in the beginning and 355.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:22:18,685 INFO L168 Benchmark]: Boogie Preprocessor took 8.98 ms. Allocated memory is still 373.3 MB. Free memory was 355.4 MB in the beginning and 354.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:22:18,687 INFO L168 Benchmark]: RCFGBuilder took 176.99 ms. Allocated memory is still 373.3 MB. Free memory was 354.3 MB in the beginning and 338.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-10 14:22:18,690 INFO L168 Benchmark]: TraceAbstraction took 535.98 ms. Allocated memory is still 373.3 MB. Free memory was 338.6 MB in the beginning and 298.8 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.0 GB. [2021-06-10 14:22:18,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 373.3 MB. Free memory was 353.6 MB in the beginning and 353.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 145.87 ms. Allocated memory is still 373.3 MB. Free memory was 334.9 MB in the beginning and 356.4 MB in the end (delta: -21.5 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.28 ms. Allocated memory is still 373.3 MB. Free memory was 356.4 MB in the beginning and 355.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.98 ms. Allocated memory is still 373.3 MB. Free memory was 355.4 MB in the beginning and 354.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 176.99 ms. Allocated memory is still 373.3 MB. Free memory was 354.3 MB in the beginning and 338.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 535.98 ms. Allocated memory is still 373.3 MB. Free memory was 338.6 MB in the beginning and 298.8 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 438.4ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 119.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 2 SDslu, 2 SDs, 0 SdLazy, 10 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=2, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.2ms SsaConstructionTime, 39.2ms SatisfiabilityAnalysisTime, 108.3ms InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 82 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...