/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:12:01,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:12:01,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:12:01,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:12:01,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:12:01,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:12:01,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:12:01,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:12:01,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:12:01,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:12:01,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:12:01,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:12:01,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:12:01,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:12:01,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:12:01,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:12:01,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:12:01,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:12:01,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:12:01,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:12:01,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:12:01,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:12:01,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:12:01,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:12:01,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:12:01,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:12:01,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:12:01,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:12:01,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:12:01,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:12:01,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:12:01,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:12:01,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:12:01,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:12:01,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:12:01,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:12:01,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:12:01,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:12:01,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:12:01,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:12:01,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:12:01,991 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-FA-SemanticLbe.epf [2020-04-17 22:12:02,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:12:02,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:12:02,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:12:02,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:12:02,024 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:12:02,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:12:02,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:12:02,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:12:02,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:12:02,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:12:02,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:12:02,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:12:02,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:12:02,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:12:02,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:12:02,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:12:02,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:12:02,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:12:02,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:12:02,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:12:02,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:12:02,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:12:02,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:12:02,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:12:02,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:12:02,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:12:02,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:12:02,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:12:02,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:12:02,353 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:12:02,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:12:02,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:12:02,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:12:02,371 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:12:02,372 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i [2020-04-17 22:12:02,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3a63878/7d35a13864814a6e972674f3408f723c/FLAG8fddc0358 [2020-04-17 22:12:03,020 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:12:03,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i [2020-04-17 22:12:03,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3a63878/7d35a13864814a6e972674f3408f723c/FLAG8fddc0358 [2020-04-17 22:12:03,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3a63878/7d35a13864814a6e972674f3408f723c [2020-04-17 22:12:03,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:12:03,381 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:12:03,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:12:03,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:12:03,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:12:03,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:12:03" (1/1) ... [2020-04-17 22:12:03,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd6520b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:03, skipping insertion in model container [2020-04-17 22:12:03,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:12:03" (1/1) ... [2020-04-17 22:12:03,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:12:03,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:12:03,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:12:03,999 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:12:04,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:12:04,134 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:12:04,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04 WrapperNode [2020-04-17 22:12:04,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:12:04,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:12:04,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:12:04,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:12:04,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:12:04,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:12:04,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:12:04,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:12:04,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... [2020-04-17 22:12:04,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:12:04,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:12:04,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:12:04,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:12:04,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:12:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:12:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 22:12:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:12:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:12:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-04-17 22:12:04,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-04-17 22:12:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-04-17 22:12:04,294 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-04-17 22:12:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-04-17 22:12:04,294 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-04-17 22:12:04,294 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-04-17 22:12:04,294 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-04-17 22:12:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 22:12:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:12:04,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:12:04,297 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 22:12:04,762 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:12:04,762 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-04-17 22:12:04,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:12:04 BoogieIcfgContainer [2020-04-17 22:12:04,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:12:04,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:12:04,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:12:04,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:12:04,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:12:03" (1/3) ... [2020-04-17 22:12:04,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2331cf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:12:04, skipping insertion in model container [2020-04-17 22:12:04,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:12:04" (2/3) ... [2020-04-17 22:12:04,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2331cf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:12:04, skipping insertion in model container [2020-04-17 22:12:04,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:12:04" (3/3) ... [2020-04-17 22:12:04,776 INFO L109 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc.i [2020-04-17 22:12:04,787 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:12:04,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:12:04,795 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:12:04,796 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:12:04,825 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,825 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,826 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,827 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,828 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,828 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,829 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,829 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,829 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,829 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,830 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,830 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,830 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,831 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,831 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,831 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,832 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,832 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,833 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,833 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,833 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,833 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,834 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,834 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,838 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,839 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,839 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,839 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,845 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,845 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,845 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,846 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,849 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,849 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,849 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,849 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,853 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,853 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,853 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,854 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:12:04,870 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-04-17 22:12:04,892 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:12:04,892 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:12:04,892 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:12:04,892 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:12:04,893 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:12:04,893 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:12:04,893 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:12:04,893 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:12:04,910 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 81 transitions, 182 flow [2020-04-17 22:12:04,912 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 92 places, 81 transitions, 182 flow [2020-04-17 22:12:04,959 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-04-17 22:12:04,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:12:04,966 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-04-17 22:12:04,969 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 92 places, 81 transitions, 182 flow [2020-04-17 22:12:05,001 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-04-17 22:12:05,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:12:05,006 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-04-17 22:12:05,011 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1822 [2020-04-17 22:12:05,014 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 22:12:07,417 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-04-17 22:12:07,507 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3093 [2020-04-17 22:12:07,507 INFO L214 etLargeBlockEncoding]: Total number of compositions: 65 [2020-04-17 22:12:07,514 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 25 transitions, 70 flow [2020-04-17 22:12:07,580 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 706 states. [2020-04-17 22:12:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states. [2020-04-17 22:12:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:12:07,599 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:07,600 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:07,601 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2005095105, now seen corresponding path program 1 times [2020-04-17 22:12:07,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:07,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972107352] [2020-04-17 22:12:07,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:07,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972107352] [2020-04-17 22:12:07,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:07,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:12:07,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706679685] [2020-04-17 22:12:07,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:12:07,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:12:07,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:12:07,902 INFO L87 Difference]: Start difference. First operand 706 states. Second operand 3 states. [2020-04-17 22:12:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:07,984 INFO L93 Difference]: Finished difference Result 670 states and 2295 transitions. [2020-04-17 22:12:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:12:07,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-04-17 22:12:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:08,017 INFO L225 Difference]: With dead ends: 670 [2020-04-17 22:12:08,018 INFO L226 Difference]: Without dead ends: 526 [2020-04-17 22:12:08,020 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:12:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-04-17 22:12:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-04-17 22:12:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-04-17 22:12:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1743 transitions. [2020-04-17 22:12:08,161 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1743 transitions. Word has length 10 [2020-04-17 22:12:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:08,163 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 1743 transitions. [2020-04-17 22:12:08,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:12:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1743 transitions. [2020-04-17 22:12:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:12:08,168 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:08,175 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:08,176 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2027599793, now seen corresponding path program 1 times [2020-04-17 22:12:08,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:08,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538766751] [2020-04-17 22:12:08,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:08,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538766751] [2020-04-17 22:12:08,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:08,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:12:08,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577503849] [2020-04-17 22:12:08,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:12:08,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:12:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:12:08,307 INFO L87 Difference]: Start difference. First operand 526 states and 1743 transitions. Second operand 4 states. [2020-04-17 22:12:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:08,344 INFO L93 Difference]: Finished difference Result 682 states and 2180 transitions. [2020-04-17 22:12:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:12:08,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-04-17 22:12:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:08,348 INFO L225 Difference]: With dead ends: 682 [2020-04-17 22:12:08,348 INFO L226 Difference]: Without dead ends: 394 [2020-04-17 22:12:08,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:12:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-04-17 22:12:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2020-04-17 22:12:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-04-17 22:12:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1224 transitions. [2020-04-17 22:12:08,364 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1224 transitions. Word has length 11 [2020-04-17 22:12:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:08,365 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 1224 transitions. [2020-04-17 22:12:08,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:12:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1224 transitions. [2020-04-17 22:12:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:12:08,367 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:08,367 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:08,367 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1004375926, now seen corresponding path program 1 times [2020-04-17 22:12:08,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:08,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117851660] [2020-04-17 22:12:08,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:08,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117851660] [2020-04-17 22:12:08,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:08,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-17 22:12:08,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626030599] [2020-04-17 22:12:08,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:12:08,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:12:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:12:08,428 INFO L87 Difference]: Start difference. First operand 394 states and 1224 transitions. Second operand 3 states. [2020-04-17 22:12:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:08,445 INFO L93 Difference]: Finished difference Result 376 states and 1155 transitions. [2020-04-17 22:12:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:12:08,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-04-17 22:12:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:08,449 INFO L225 Difference]: With dead ends: 376 [2020-04-17 22:12:08,449 INFO L226 Difference]: Without dead ends: 376 [2020-04-17 22:12:08,449 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:12:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-04-17 22:12:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-04-17 22:12:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-04-17 22:12:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1155 transitions. [2020-04-17 22:12:08,465 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1155 transitions. Word has length 12 [2020-04-17 22:12:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:08,466 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 1155 transitions. [2020-04-17 22:12:08,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:12:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1155 transitions. [2020-04-17 22:12:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:12:08,473 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:08,474 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:08,474 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:08,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1070016734, now seen corresponding path program 1 times [2020-04-17 22:12:08,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:08,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085244069] [2020-04-17 22:12:08,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:08,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085244069] [2020-04-17 22:12:08,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:08,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:12:08,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214945515] [2020-04-17 22:12:08,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:12:08,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:08,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:12:08,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:12:08,568 INFO L87 Difference]: Start difference. First operand 376 states and 1155 transitions. Second operand 4 states. [2020-04-17 22:12:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:08,602 INFO L93 Difference]: Finished difference Result 526 states and 1582 transitions. [2020-04-17 22:12:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:12:08,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-04-17 22:12:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:08,606 INFO L225 Difference]: With dead ends: 526 [2020-04-17 22:12:08,606 INFO L226 Difference]: Without dead ends: 286 [2020-04-17 22:12:08,606 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:12:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-04-17 22:12:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-04-17 22:12:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-04-17 22:12:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 851 transitions. [2020-04-17 22:12:08,617 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 851 transitions. Word has length 13 [2020-04-17 22:12:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:08,618 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 851 transitions. [2020-04-17 22:12:08,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:12:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 851 transitions. [2020-04-17 22:12:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:12:08,619 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:08,619 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:08,619 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:08,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1152221153, now seen corresponding path program 1 times [2020-04-17 22:12:08,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:08,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396307904] [2020-04-17 22:12:08,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:08,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396307904] [2020-04-17 22:12:08,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:08,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:12:08,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682471090] [2020-04-17 22:12:08,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:12:08,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:12:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:12:08,722 INFO L87 Difference]: Start difference. First operand 286 states and 851 transitions. Second operand 4 states. [2020-04-17 22:12:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:08,754 INFO L93 Difference]: Finished difference Result 458 states and 1291 transitions. [2020-04-17 22:12:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:12:08,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-04-17 22:12:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:08,757 INFO L225 Difference]: With dead ends: 458 [2020-04-17 22:12:08,757 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 22:12:08,758 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:12:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 22:12:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2020-04-17 22:12:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-04-17 22:12:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 619 transitions. [2020-04-17 22:12:08,765 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 619 transitions. Word has length 14 [2020-04-17 22:12:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:08,766 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 619 transitions. [2020-04-17 22:12:08,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:12:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 619 transitions. [2020-04-17 22:12:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:12:08,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:08,767 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:08,767 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:08,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1162350155, now seen corresponding path program 1 times [2020-04-17 22:12:08,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:08,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32492935] [2020-04-17 22:12:08,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:08,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32492935] [2020-04-17 22:12:08,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:08,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:12:08,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236072991] [2020-04-17 22:12:08,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:12:08,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:12:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:12:08,874 INFO L87 Difference]: Start difference. First operand 226 states and 619 transitions. Second operand 4 states. [2020-04-17 22:12:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:08,938 INFO L93 Difference]: Finished difference Result 287 states and 728 transitions. [2020-04-17 22:12:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:12:08,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-04-17 22:12:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:08,941 INFO L225 Difference]: With dead ends: 287 [2020-04-17 22:12:08,941 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:12:08,942 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:12:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:12:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-04-17 22:12:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-04-17 22:12:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 530 transitions. [2020-04-17 22:12:08,948 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 530 transitions. Word has length 14 [2020-04-17 22:12:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:08,949 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 530 transitions. [2020-04-17 22:12:08,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:12:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 530 transitions. [2020-04-17 22:12:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 22:12:08,950 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:08,950 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:08,950 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1647463604, now seen corresponding path program 1 times [2020-04-17 22:12:08,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:08,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554181509] [2020-04-17 22:12:08,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:09,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554181509] [2020-04-17 22:12:09,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:09,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:12:09,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854003819] [2020-04-17 22:12:09,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:12:09,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:12:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:12:09,030 INFO L87 Difference]: Start difference. First operand 206 states and 530 transitions. Second operand 5 states. [2020-04-17 22:12:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:09,079 INFO L93 Difference]: Finished difference Result 227 states and 530 transitions. [2020-04-17 22:12:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:12:09,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-04-17 22:12:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:09,081 INFO L225 Difference]: With dead ends: 227 [2020-04-17 22:12:09,081 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 22:12:09,082 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:12:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 22:12:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-04-17 22:12:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 22:12:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 369 transitions. [2020-04-17 22:12:09,087 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 369 transitions. Word has length 15 [2020-04-17 22:12:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:09,087 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 369 transitions. [2020-04-17 22:12:09,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:12:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 369 transitions. [2020-04-17 22:12:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 22:12:09,088 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:09,088 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:09,089 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -469082430, now seen corresponding path program 1 times [2020-04-17 22:12:09,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:09,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847440078] [2020-04-17 22:12:09,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:09,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847440078] [2020-04-17 22:12:09,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:09,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:12:09,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132116441] [2020-04-17 22:12:09,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:12:09,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:12:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:12:09,190 INFO L87 Difference]: Start difference. First operand 162 states and 369 transitions. Second operand 6 states. [2020-04-17 22:12:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:09,260 INFO L93 Difference]: Finished difference Result 158 states and 337 transitions. [2020-04-17 22:12:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:12:09,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-04-17 22:12:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:09,264 INFO L225 Difference]: With dead ends: 158 [2020-04-17 22:12:09,264 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 22:12:09,265 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:12:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 22:12:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-04-17 22:12:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 22:12:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 265 transitions. [2020-04-17 22:12:09,270 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 265 transitions. Word has length 16 [2020-04-17 22:12:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:09,271 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 265 transitions. [2020-04-17 22:12:09,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:12:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 265 transitions. [2020-04-17 22:12:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 22:12:09,272 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:09,272 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:09,272 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 483879941, now seen corresponding path program 1 times [2020-04-17 22:12:09,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:09,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331578469] [2020-04-17 22:12:09,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:09,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331578469] [2020-04-17 22:12:09,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:09,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-17 22:12:09,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537241694] [2020-04-17 22:12:09,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 22:12:09,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 22:12:09,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:12:09,405 INFO L87 Difference]: Start difference. First operand 125 states and 265 transitions. Second operand 7 states. [2020-04-17 22:12:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:09,486 INFO L93 Difference]: Finished difference Result 120 states and 253 transitions. [2020-04-17 22:12:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:12:09,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-04-17 22:12:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:09,488 INFO L225 Difference]: With dead ends: 120 [2020-04-17 22:12:09,488 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 22:12:09,488 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-04-17 22:12:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 22:12:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-04-17 22:12:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 22:12:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 143 transitions. [2020-04-17 22:12:09,491 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 143 transitions. Word has length 18 [2020-04-17 22:12:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:09,492 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 143 transitions. [2020-04-17 22:12:09,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 22:12:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 143 transitions. [2020-04-17 22:12:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 22:12:09,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:12:09,493 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:12:09,493 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:12:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:12:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1087350585, now seen corresponding path program 1 times [2020-04-17 22:12:09,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:12:09,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834094145] [2020-04-17 22:12:09,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:12:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:12:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:12:09,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834094145] [2020-04-17 22:12:09,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:12:09,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:12:09,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704633415] [2020-04-17 22:12:09,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:12:09,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:12:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:12:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:12:09,537 INFO L87 Difference]: Start difference. First operand 71 states and 143 transitions. Second operand 4 states. [2020-04-17 22:12:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:12:09,549 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2020-04-17 22:12:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:12:09,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-04-17 22:12:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:12:09,550 INFO L225 Difference]: With dead ends: 70 [2020-04-17 22:12:09,550 INFO L226 Difference]: Without dead ends: 0 [2020-04-17 22:12:09,550 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:12:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-17 22:12:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-17 22:12:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-17 22:12:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-17 22:12:09,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-04-17 22:12:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:12:09,552 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-17 22:12:09,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:12:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-17 22:12:09,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-17 22:12:09,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 10:12:09 BasicIcfg [2020-04-17 22:12:09,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 22:12:09,560 INFO L168 Benchmark]: Toolchain (without parser) took 6197.18 ms. Allocated memory was 144.2 MB in the beginning and 291.0 MB in the end (delta: 146.8 MB). Free memory was 100.8 MB in the beginning and 234.7 MB in the end (delta: -134.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-04-17 22:12:09,561 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-04-17 22:12:09,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 752.70 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 98.8 MB in the beginning and 156.6 MB in the end (delta: -57.8 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-04-17 22:12:09,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 200.8 MB. Free memory was 156.6 MB in the beginning and 154.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 22:12:09,568 INFO L168 Benchmark]: Boogie Preprocessor took 30.16 ms. Allocated memory is still 200.8 MB. Free memory was 154.6 MB in the beginning and 152.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 22:12:09,569 INFO L168 Benchmark]: RCFGBuilder took 547.69 ms. Allocated memory is still 200.8 MB. Free memory was 152.5 MB in the beginning and 128.8 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-04-17 22:12:09,574 INFO L168 Benchmark]: TraceAbstraction took 4788.96 ms. Allocated memory was 200.8 MB in the beginning and 291.0 MB in the end (delta: 90.2 MB). Free memory was 128.8 MB in the beginning and 234.7 MB in the end (delta: -105.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-17 22:12:09,580 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 752.70 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 98.8 MB in the beginning and 156.6 MB in the end (delta: -57.8 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 200.8 MB. Free memory was 156.6 MB in the beginning and 154.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.16 ms. Allocated memory is still 200.8 MB. Free memory was 154.6 MB in the beginning and 152.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 547.69 ms. Allocated memory is still 200.8 MB. Free memory was 152.5 MB in the beginning and 128.8 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4788.96 ms. Allocated memory was 200.8 MB in the beginning and 291.0 MB in the end (delta: 90.2 MB). Free memory was 128.8 MB in the beginning and 234.7 MB in the end (delta: -105.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.5s, 92 ProgramPointsBefore, 38 ProgramPointsAfterwards, 81 TransitionsBefore, 25 TransitionsAfterwards, 1822 CoEnabledTransitionPairs, 7 FixpointIterations, 14 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 951 VarBasedMoverChecksPositive, 45 VarBasedMoverChecksNegative, 25 SemBasedMoverChecksPositive, 44 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.5s, 0 MoverChecksTotal, 3093 CheckedPairsTotal, 65 TotalNumberOfCompositions - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 80 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 214 SDtfs, 237 SDslu, 324 SDs, 0 SdLazy, 185 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=706occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 24 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 5575 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...