/usr/bin/java -Xmx8000000000 -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-POR-NewStatesSleepPersistentFixedOrder-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/forkForkSimple.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-14 15:22:30,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-14 15:22:30,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-14 15:22:30,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-14 15:22:30,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-14 15:22:30,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-14 15:22:30,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-14 15:22:30,351 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-POR-NewStatesSleepPersistentFixedOrder-NoLbe.epf [2021-06-14 15:22:30,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-14 15:22:30,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-14 15:22:30,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-14 15:22:30,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-14 15:22:30,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-14 15:22:30,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-14 15:22:30,389 INFO L138 SettingsManager]: * Use SBE=true [2021-06-14 15:22:30,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-14 15:22:30,390 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-14 15:22:30,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-14 15:22:30,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-14 15:22:30,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-14 15:22:30,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-14 15:22:30,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-14 15:22:30,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-14 15:22:30,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-14 15:22:30,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-14 15:22:30,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-14 15:22:30,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-14 15:22:30,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-14 15:22:30,394 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2021-06-14 15:22:30,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-14 15:22:30,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-14 15:22:30,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-14 15:22:30,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-14 15:22:30,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-14 15:22:30,706 INFO L275 PluginConnector]: CDTParser initialized [2021-06-14 15:22:30,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/forkForkSimple.c [2021-06-14 15:22:30,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f51a4d9a/f5df330792044b8d8d2b84a494a2b869/FLAG2c0d1c9b3 [2021-06-14 15:22:31,189 INFO L306 CDTParser]: Found 1 translation units. [2021-06-14 15:22:31,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/forkForkSimple.c [2021-06-14 15:22:31,191 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-14 15:22:31,191 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-14 15:22:31,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f51a4d9a/f5df330792044b8d8d2b84a494a2b869/FLAG2c0d1c9b3 [2021-06-14 15:22:31,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f51a4d9a/f5df330792044b8d8d2b84a494a2b869 [2021-06-14 15:22:31,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-14 15:22:31,605 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-14 15:22:31,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-14 15:22:31,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-14 15:22:31,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-14 15:22:31,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18fc88b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31, skipping insertion in model container [2021-06-14 15:22:31,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-14 15:22:31,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-14 15:22:31,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-14 15:22:31,798 INFO L203 MainTranslator]: Completed pre-run [2021-06-14 15:22:31,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-14 15:22:31,819 INFO L208 MainTranslator]: Completed translation [2021-06-14 15:22:31,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31 WrapperNode [2021-06-14 15:22:31,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-14 15:22:31,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-14 15:22:31,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-14 15:22:31,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-14 15:22:31,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-14 15:22:31,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-14 15:22:31,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-14 15:22:31,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-14 15:22:31,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (1/1) ... [2021-06-14 15:22:31,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-14 15:22:31,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-14 15:22:31,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-14 15:22:31,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-14 15:22:31,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (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 [2021-06-14 15:22:31,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-14 15:22:31,947 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-06-14 15:22:31,948 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-06-14 15:22:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-14 15:22:31,948 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-14 15:22:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-14 15:22:31,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-14 15:22:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-14 15:22:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-14 15:22:31,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-14 15:22:31,949 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-14 15:22:32,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-14 15:22:32,156 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-14 15:22:32,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 03:22:32 BoogieIcfgContainer [2021-06-14 15:22:32,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-14 15:22:32,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-14 15:22:32,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-14 15:22:32,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-14 15:22:32,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 03:22:31" (1/3) ... [2021-06-14 15:22:32,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e8aa5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 03:22:32, skipping insertion in model container [2021-06-14 15:22:32,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 03:22:31" (2/3) ... [2021-06-14 15:22:32,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e8aa5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 03:22:32, skipping insertion in model container [2021-06-14 15:22:32,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 03:22:32" (3/3) ... [2021-06-14 15:22:32,163 INFO L111 eAbstractionObserver]: Analyzing ICFG forkForkSimple.c [2021-06-14 15:22:32,168 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-14 15:22:32,168 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-14 15:22:32,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-14 15:22:32,169 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-14 15:22:32,192 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#in~b.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,193 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#in~b.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,193 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,193 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,193 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#in~b.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#in~b.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,194 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,195 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#in~a.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,195 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#in~a.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,195 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_~a.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,195 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_~a.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#in~a.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#in~a.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_~a.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_~a.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,196 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,197 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,197 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,197 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,197 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,197 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,198 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,198 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,198 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,198 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,198 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,198 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,199 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,199 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,199 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,199 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,199 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,199 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,200 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,200 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,200 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,201 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,201 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,201 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,201 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,201 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,201 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,202 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,202 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,202 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,202 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,202 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,204 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,204 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,205 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,205 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,209 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_~a.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_~a.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#t~pre0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,210 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,211 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork1_~#second_thread~0.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,213 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,214 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,214 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_~b.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,214 WARN L313 ript$VariableManager]: TermVariabe |barThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:22:32,239 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-14 15:22:32,273 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:22:32,316 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:22:32,316 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:22:32,316 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:22:32,316 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:22:32,316 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:22:32,317 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:22:32,317 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:22:32,317 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork1======== [2021-06-14 15:22:32,545 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork1 was SAFE (1/3) [2021-06-14 15:22:32,547 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:22:32,565 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:22:32,565 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:22:32,565 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:22:32,565 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:22:32,565 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:22:32,566 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:22:32,566 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:22:32,566 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 15:22:32,629 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/3) [2021-06-14 15:22:32,629 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:22:32,641 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:22:32,641 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:22:32,641 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:22:32,641 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:22:32,642 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:22:32,642 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:22:32,642 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:22:32,642 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:22:32,648 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:22:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:22:32,653 INFO L82 PathProgramCache]: Analyzing trace with hash 148192278, now seen corresponding path program 1 times Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:22:32,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:22:32,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609065103] [2021-06-14 15:22:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:22:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:22:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:22:32,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:22:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609065103] [2021-06-14 15:22:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609065103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:22:32,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:22:32,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-14 15:22:32,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295553311] [2021-06-14 15:22:32,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-14 15:22:32,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:22:32,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-14 15:22:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-14 15:22:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:22:32,848 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:22:32,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-06-14 15:22:32,849 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:22:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-14 15:22:32,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-14 15:22:32,923 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (3/3) [2021-06-14 15:22:32,924 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-14 15:22:32,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 03:22:32 BasicIcfg [2021-06-14 15:22:32,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-14 15:22:32,927 INFO L168 Benchmark]: Toolchain (without parser) took 1322.15 ms. Allocated memory is still 179.3 MB. Free memory was 141.9 MB in the beginning and 104.0 MB in the end (delta: 37.9 MB). Peak memory consumption was 36.3 MB. Max. memory is 8.0 GB. [2021-06-14 15:22:32,927 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory is still 159.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-14 15:22:32,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.76 ms. Allocated memory is still 179.3 MB. Free memory was 141.6 MB in the beginning and 160.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-14 15:22:32,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.77 ms. Allocated memory is still 179.3 MB. Free memory was 160.7 MB in the beginning and 159.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-14 15:22:32,929 INFO L168 Benchmark]: Boogie Preprocessor took 14.14 ms. Allocated memory is still 179.3 MB. Free memory was 159.5 MB in the beginning and 158.6 MB in the end (delta: 957.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-14 15:22:32,929 INFO L168 Benchmark]: RCFGBuilder took 298.80 ms. Allocated memory is still 179.3 MB. Free memory was 158.6 MB in the beginning and 144.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-14 15:22:32,929 INFO L168 Benchmark]: TraceAbstraction took 767.23 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 104.0 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-06-14 15:22:32,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory is still 159.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 212.76 ms. Allocated memory is still 179.3 MB. Free memory was 141.6 MB in the beginning and 160.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.77 ms. Allocated memory is still 179.3 MB. Free memory was 160.7 MB in the beginning and 159.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.14 ms. Allocated memory is still 179.3 MB. Free memory was 159.5 MB in the beginning and 158.6 MB in the end (delta: 957.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.80 ms. Allocated memory is still 179.3 MB. Free memory was 158.6 MB in the beginning and 144.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 767.23 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 104.0 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 997, positive: 992, positive conditional: 84, positive unconditional: 908, negative: 5, negative conditional: 2, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 996, positive: 992, positive conditional: 84, positive unconditional: 908, negative: 4, negative conditional: 1, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 996, positive: 992, positive conditional: 0, positive unconditional: 992, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 223, positive: 221, positive conditional: 0, positive unconditional: 221, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 223, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 72, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 996, positive: 771, positive conditional: 0, positive unconditional: 771, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 223, unknown conditional: 0, unknown unconditional: 223] , Statistics on independence cache: Total cache size (in pairs): 223, Positive cache size: 221, Positive conditional cache size: 0, Positive unconditional cache size: 221, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 ], Maximal queried relation: 0, Independence queries for same thread: 1 - StatisticsResult: Persistent set benchmarks Persistent set computation time[ms]: 164, Number of persistent set computation: 171, Number of trivial persistent sets: 161, Underlying independence relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 997, positive: 992, positive conditional: 84, positive unconditional: 908, negative: 5, negative conditional: 2, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 996, positive: 992, positive conditional: 84, positive unconditional: 908, negative: 4, negative conditional: 1, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 996, positive: 992, positive conditional: 0, positive unconditional: 992, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 223, positive: 221, positive conditional: 0, positive unconditional: 221, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 223, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 72, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 996, positive: 771, positive conditional: 0, positive unconditional: 771, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 223, unknown conditional: 0, unknown unconditional: 223] , Statistics on independence cache: Total cache size (in pairs): 223, Positive cache size: 221, Positive conditional cache size: 0, Positive unconditional cache size: 221, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 ], Maximal queried relation: 0, Independence queries for same thread: 1 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 315, positive: 311, positive conditional: 15, positive unconditional: 296, negative: 4, negative conditional: 2, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 314, positive: 311, positive conditional: 15, positive unconditional: 296, negative: 3, negative conditional: 1, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 314, positive: 311, positive conditional: 0, positive unconditional: 311, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 205, positive: 204, positive conditional: 0, positive unconditional: 204, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 205, positive: 203, positive conditional: 0, positive unconditional: 203, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 43, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 314, positive: 107, positive conditional: 0, positive unconditional: 107, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 205, unknown conditional: 0, unknown unconditional: 205] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 204, Positive conditional cache size: 0, Positive unconditional cache size: 204, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 ], Maximal queried relation: 0, Independence queries for same thread: 1 - StatisticsResult: Persistent set benchmarks Persistent set computation time[ms]: 53, Number of persistent set computation: 64, Number of trivial persistent sets: 51, Underlying independence relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 315, positive: 311, positive conditional: 15, positive unconditional: 296, negative: 4, negative conditional: 2, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 314, positive: 311, positive conditional: 15, positive unconditional: 296, negative: 3, negative conditional: 1, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 314, positive: 311, positive conditional: 0, positive unconditional: 311, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 205, positive: 204, positive conditional: 0, positive unconditional: 204, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 205, positive: 203, positive conditional: 0, positive unconditional: 203, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 43, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 314, positive: 107, positive conditional: 0, positive unconditional: 107, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 205, unknown conditional: 0, unknown unconditional: 205] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 204, Positive conditional cache size: 0, Positive unconditional cache size: 204, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 ], Maximal queried relation: 0, Independence queries for same thread: 1 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 316, positive: 312, positive conditional: 16, positive unconditional: 296, negative: 4, negative conditional: 2, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 315, positive: 312, positive conditional: 16, positive unconditional: 296, negative: 3, negative conditional: 1, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 315, positive: 312, positive conditional: 0, positive unconditional: 312, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 205, positive: 204, positive conditional: 0, positive unconditional: 204, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 205, positive: 203, positive conditional: 0, positive unconditional: 203, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 37, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 315, positive: 108, positive conditional: 0, positive unconditional: 108, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 205, unknown conditional: 0, unknown unconditional: 205] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 204, Positive conditional cache size: 0, Positive unconditional cache size: 204, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, SemanticConditionEliminator.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 37, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 204, Positive conditional cache size: 0, Positive unconditional cache size: 204, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Eliminated conditions: 1 ], Maximal queried relation: 1, Independence queries for same thread: 1 - StatisticsResult: Persistent set benchmarks Persistent set computation time[ms]: 43, Number of persistent set computation: 76, Number of trivial persistent sets: 61, Underlying independence relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 316, positive: 312, positive conditional: 16, positive unconditional: 296, negative: 4, negative conditional: 2, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 315, positive: 312, positive conditional: 16, positive unconditional: 296, negative: 3, negative conditional: 1, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 315, positive: 312, positive conditional: 0, positive unconditional: 312, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 205, positive: 204, positive conditional: 0, positive unconditional: 204, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 205, positive: 203, positive conditional: 0, positive unconditional: 203, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 37, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 315, positive: 108, positive conditional: 0, positive unconditional: 108, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 205, unknown conditional: 0, unknown unconditional: 205] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 204, Positive conditional cache size: 0, Positive unconditional cache size: 204, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, SemanticConditionEliminator.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 37, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 204, Positive conditional cache size: 0, Positive unconditional cache size: 204, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Eliminated conditions: 1 ], Maximal queried relation: 1, Independence queries for same thread: 1 - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: fooThread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 64 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 258.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 205.5ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, 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: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: foo with 1 thread instances CFG has 5 procedures, 64 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 70.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.5ms, PartialOrderReductionTime: 59.4ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, 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: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 64 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 292.8ms, OverallIterations: 1, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.3ms, PartialOrderReductionTime: 72.7ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 3, 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: 3.6ms SsaConstructionTime, 19.3ms SatisfiabilityAnalysisTime, 74.9ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 27 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...