/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 17:24:26,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 17:24:26,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 17:24:27,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 17:24:27,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 17:24:27,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 17:24:27,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 17:24:27,067 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-NoLbe.epf [2021-05-21 17:24:27,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 17:24:27,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 17:24:27,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 17:24:27,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 17:24:27,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 17:24:27,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 17:24:27,096 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 17:24:27,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 17:24:27,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 17:24:27,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 17:24:27,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 17:24:27,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 17:24:27,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 17:24:27,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 17:24:27,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 17:24:27,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 17:24:27,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 17:24:27,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 17:24:27,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 17:24:27,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 17:24:27,099 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 17:24:27,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 17:24:27,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 17:24:27,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 17:24:27,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 17:24:27,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 17:24:27,350 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 17:24:27,350 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 17:24:27,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.oepc.i [2021-05-21 17:24:27,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55db4b090/e0e41a99569d486298bed34c323ac43b/FLAGbcb90e4d1 [2021-05-21 17:24:27,909 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 17:24:27,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.oepc.i [2021-05-21 17:24:27,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55db4b090/e0e41a99569d486298bed34c323ac43b/FLAGbcb90e4d1 [2021-05-21 17:24:28,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55db4b090/e0e41a99569d486298bed34c323ac43b [2021-05-21 17:24:28,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 17:24:28,370 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 17:24:28,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 17:24:28,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 17:24:28,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 17:24:28,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21863d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28, skipping insertion in model container [2021-05-21 17:24:28,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 17:24:28,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 17:24:28,514 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.oepc.i[950,963] [2021-05-21 17:24:28,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 17:24:28,626 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 17:24:28,637 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.oepc.i[950,963] [2021-05-21 17:24:28,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 17:24:28,709 INFO L208 MainTranslator]: Completed translation [2021-05-21 17:24:28,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28 WrapperNode [2021-05-21 17:24:28,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 17:24:28,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 17:24:28,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 17:24:28,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 17:24:28,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 17:24:28,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 17:24:28,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 17:24:28,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 17:24:28,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (1/1) ... [2021-05-21 17:24:28,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 17:24:28,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 17:24:28,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 17:24:28,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 17:24:28,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (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 [2021-05-21 17:24:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-05-21 17:24:28,790 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-05-21 17:24:28,790 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-05-21 17:24:28,790 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 17:24:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 17:24:28,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 17:24:28,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 17:24:28,791 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 17:24:29,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 17:24:29,043 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-05-21 17:24:29,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 05:24:29 BoogieIcfgContainer [2021-05-21 17:24:29,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 17:24:29,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 17:24:29,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 17:24:29,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 17:24:29,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 05:24:28" (1/3) ... [2021-05-21 17:24:29,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbcbb08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 05:24:29, skipping insertion in model container [2021-05-21 17:24:29,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 05:24:28" (2/3) ... [2021-05-21 17:24:29,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbcbb08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 05:24:29, skipping insertion in model container [2021-05-21 17:24:29,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 05:24:29" (3/3) ... [2021-05-21 17:24:29,049 INFO L111 eAbstractionObserver]: Analyzing ICFG safe017_tso.oepc.i [2021-05-21 17:24:29,052 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 17:24:29,053 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 17:24:29,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 17:24:29,053 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 17:24:29,069 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,070 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,071 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,071 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,071 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,071 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,071 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,071 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,072 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,073 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,074 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,076 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,076 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,076 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,076 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,079 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,079 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,079 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,079 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,080 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,081 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,081 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,081 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 17:24:29,082 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 17:24:29,095 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 17:24:29,106 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 17:24:29,106 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 17:24:29,106 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 17:24:29,106 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 17:24:29,106 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 17:24:29,106 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 17:24:29,106 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 17:24:29,109 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 17:24:29,121 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 89 places, 81 transitions, 177 flow [2021-05-21 17:24:29,389 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8007 states, 8005 states have (on average 3.5370393504059963) internal successors, (28314), 8006 states have internal predecessors, (28314), 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) [2021-05-21 17:24:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 8007 states, 8005 states have (on average 3.5370393504059963) internal successors, (28314), 8006 states have internal predecessors, (28314), 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) [2021-05-21 17:24:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 17:24:29,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:29,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:29,454 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash 217118883, now seen corresponding path program 1 times [2021-05-21 17:24:29,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:29,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506594922] [2021-05-21 17:24:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:29,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506594922] [2021-05-21 17:24:29,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506594922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:29,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:29,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 17:24:29,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780465156] [2021-05-21 17:24:29,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:24:29,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:24:29,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:24:29,784 INFO L87 Difference]: Start difference. First operand has 8007 states, 8005 states have (on average 3.5370393504059963) internal successors, (28314), 8006 states have internal predecessors, (28314), 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) Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2021-05-21 17:24:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:30,107 INFO L93 Difference]: Finished difference Result 16101 states and 55015 transitions. [2021-05-21 17:24:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 17:24:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) Word has length 47 [2021-05-21 17:24:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:30,140 INFO L225 Difference]: With dead ends: 16101 [2021-05-21 17:24:30,141 INFO L226 Difference]: Without dead ends: 5223 [2021-05-21 17:24:30,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-21 17:24:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-05-21 17:24:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4359. [2021-05-21 17:24:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.2836163377696193) internal successors, (14310), 4358 states have internal predecessors, (14310), 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) [2021-05-21 17:24:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 14310 transitions. [2021-05-21 17:24:30,352 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 14310 transitions. Word has length 47 [2021-05-21 17:24:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:30,353 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 14310 transitions. [2021-05-21 17:24:30,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2021-05-21 17:24:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 14310 transitions. [2021-05-21 17:24:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 17:24:30,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:30,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:30,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 17:24:30,360 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -760639326, now seen corresponding path program 1 times [2021-05-21 17:24:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:30,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435028889] [2021-05-21 17:24:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:30,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435028889] [2021-05-21 17:24:30,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435028889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:30,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:30,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 17:24:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157342724] [2021-05-21 17:24:30,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:24:30,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:30,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:24:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:24:30,531 INFO L87 Difference]: Start difference. First operand 4359 states and 14310 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-05-21 17:24:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:30,677 INFO L93 Difference]: Finished difference Result 6395 states and 20706 transitions. [2021-05-21 17:24:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 17:24:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) Word has length 49 [2021-05-21 17:24:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:30,692 INFO L225 Difference]: With dead ends: 6395 [2021-05-21 17:24:30,692 INFO L226 Difference]: Without dead ends: 3555 [2021-05-21 17:24:30,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 17:24:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2021-05-21 17:24:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3555. [2021-05-21 17:24:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.1941474395047833) internal successors, (11352), 3554 states have internal predecessors, (11352), 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) [2021-05-21 17:24:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 11352 transitions. [2021-05-21 17:24:30,806 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 11352 transitions. Word has length 49 [2021-05-21 17:24:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:30,806 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 11352 transitions. [2021-05-21 17:24:30,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-05-21 17:24:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 11352 transitions. [2021-05-21 17:24:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 17:24:30,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:30,814 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:30,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 17:24:30,814 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1277249931, now seen corresponding path program 1 times [2021-05-21 17:24:30,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:30,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583343856] [2021-05-21 17:24:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:30,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:30,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583343856] [2021-05-21 17:24:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583343856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:30,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:30,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 17:24:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951613700] [2021-05-21 17:24:30,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:24:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:24:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:24:30,933 INFO L87 Difference]: Start difference. First operand 3555 states and 11352 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-05-21 17:24:31,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:31,118 INFO L93 Difference]: Finished difference Result 4883 states and 15484 transitions. [2021-05-21 17:24:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 17:24:31,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) Word has length 51 [2021-05-21 17:24:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:31,136 INFO L225 Difference]: With dead ends: 4883 [2021-05-21 17:24:31,137 INFO L226 Difference]: Without dead ends: 4259 [2021-05-21 17:24:31,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-21 17:24:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-05-21 17:24:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3315. [2021-05-21 17:24:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.1780325890162944) internal successors, (10532), 3314 states have internal predecessors, (10532), 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) [2021-05-21 17:24:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 10532 transitions. [2021-05-21 17:24:31,207 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 10532 transitions. Word has length 51 [2021-05-21 17:24:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:31,209 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 10532 transitions. [2021-05-21 17:24:31,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-05-21 17:24:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 10532 transitions. [2021-05-21 17:24:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 17:24:31,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:31,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:31,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 17:24:31,214 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1355241503, now seen corresponding path program 1 times [2021-05-21 17:24:31,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:31,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849677401] [2021-05-21 17:24:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:31,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:31,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849677401] [2021-05-21 17:24:31,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849677401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:31,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:31,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 17:24:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284695866] [2021-05-21 17:24:31,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:24:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:24:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:24:31,296 INFO L87 Difference]: Start difference. First operand 3315 states and 10532 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) [2021-05-21 17:24:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:31,467 INFO L93 Difference]: Finished difference Result 5587 states and 17440 transitions. [2021-05-21 17:24:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 17:24:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) Word has length 52 [2021-05-21 17:24:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:31,494 INFO L225 Difference]: With dead ends: 5587 [2021-05-21 17:24:31,495 INFO L226 Difference]: Without dead ends: 4035 [2021-05-21 17:24:31,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-21 17:24:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2021-05-21 17:24:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 3075. [2021-05-21 17:24:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3074 states have (on average 3.1294729993493817) internal successors, (9620), 3074 states have internal predecessors, (9620), 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) [2021-05-21 17:24:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 9620 transitions. [2021-05-21 17:24:31,570 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 9620 transitions. Word has length 52 [2021-05-21 17:24:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:31,572 INFO L482 AbstractCegarLoop]: Abstraction has 3075 states and 9620 transitions. [2021-05-21 17:24:31,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) [2021-05-21 17:24:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 9620 transitions. [2021-05-21 17:24:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-21 17:24:31,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:31,577 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:31,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 17:24:31,577 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash -852160694, now seen corresponding path program 1 times [2021-05-21 17:24:31,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:31,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446790428] [2021-05-21 17:24:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:31,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:31,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446790428] [2021-05-21 17:24:31,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446790428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:31,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:31,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 17:24:31,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517821467] [2021-05-21 17:24:31,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 17:24:31,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:31,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 17:24:31,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 17:24:31,665 INFO L87 Difference]: Start difference. First operand 3075 states and 9620 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-05-21 17:24:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:31,751 INFO L93 Difference]: Finished difference Result 3927 states and 12136 transitions. [2021-05-21 17:24:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 17:24:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) Word has length 53 [2021-05-21 17:24:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:31,758 INFO L225 Difference]: With dead ends: 3927 [2021-05-21 17:24:31,758 INFO L226 Difference]: Without dead ends: 2871 [2021-05-21 17:24:31,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 17:24:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-05-21 17:24:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2871. [2021-05-21 17:24:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.088501742160279) internal successors, (8864), 2870 states have internal predecessors, (8864), 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) [2021-05-21 17:24:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8864 transitions. [2021-05-21 17:24:31,813 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8864 transitions. Word has length 53 [2021-05-21 17:24:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:31,813 INFO L482 AbstractCegarLoop]: Abstraction has 2871 states and 8864 transitions. [2021-05-21 17:24:31,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-05-21 17:24:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8864 transitions. [2021-05-21 17:24:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-21 17:24:31,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:31,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:31,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 17:24:31,819 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1189645422, now seen corresponding path program 1 times [2021-05-21 17:24:31,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:31,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826932771] [2021-05-21 17:24:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:31,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:31,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826932771] [2021-05-21 17:24:31,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826932771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:31,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:31,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 17:24:31,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923887928] [2021-05-21 17:24:31,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:24:31,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:24:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:24:31,916 INFO L87 Difference]: Start difference. First operand 2871 states and 8864 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) [2021-05-21 17:24:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:32,032 INFO L93 Difference]: Finished difference Result 3129 states and 9432 transitions. [2021-05-21 17:24:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 17:24:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) Word has length 54 [2021-05-21 17:24:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:32,037 INFO L225 Difference]: With dead ends: 3129 [2021-05-21 17:24:32,037 INFO L226 Difference]: Without dead ends: 2153 [2021-05-21 17:24:32,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 17:24:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-05-21 17:24:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2153. [2021-05-21 17:24:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.967007434944238) internal successors, (6385), 2152 states have internal predecessors, (6385), 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) [2021-05-21 17:24:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 6385 transitions. [2021-05-21 17:24:32,069 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 6385 transitions. Word has length 54 [2021-05-21 17:24:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:32,069 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 6385 transitions. [2021-05-21 17:24:32,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) [2021-05-21 17:24:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 6385 transitions. [2021-05-21 17:24:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-21 17:24:32,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:32,072 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:32,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 17:24:32,073 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:32,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1678086793, now seen corresponding path program 1 times [2021-05-21 17:24:32,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:32,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341335465] [2021-05-21 17:24:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:32,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:32,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341335465] [2021-05-21 17:24:32,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341335465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:32,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:32,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 17:24:32,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844950646] [2021-05-21 17:24:32,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 17:24:32,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:32,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 17:24:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 17:24:32,128 INFO L87 Difference]: Start difference. First operand 2153 states and 6385 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:24:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:32,187 INFO L93 Difference]: Finished difference Result 2606 states and 7632 transitions. [2021-05-21 17:24:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 17:24:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-05-21 17:24:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:32,190 INFO L225 Difference]: With dead ends: 2606 [2021-05-21 17:24:32,190 INFO L226 Difference]: Without dead ends: 1589 [2021-05-21 17:24:32,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 17:24:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-05-21 17:24:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1427. [2021-05-21 17:24:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 2.829593267882188) internal successors, (4035), 1426 states have internal predecessors, (4035), 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) [2021-05-21 17:24:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4035 transitions. [2021-05-21 17:24:32,211 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4035 transitions. Word has length 56 [2021-05-21 17:24:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:32,212 INFO L482 AbstractCegarLoop]: Abstraction has 1427 states and 4035 transitions. [2021-05-21 17:24:32,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:24:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4035 transitions. [2021-05-21 17:24:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-21 17:24:32,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 17:24:32,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 17:24:32,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 17:24:32,214 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 17:24:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 17:24:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2099323983, now seen corresponding path program 2 times [2021-05-21 17:24:32,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 17:24:32,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822334876] [2021-05-21 17:24:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 17:24:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 17:24:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 17:24:32,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 17:24:32,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822334876] [2021-05-21 17:24:32,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822334876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 17:24:32,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 17:24:32,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 17:24:32,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843625812] [2021-05-21 17:24:32,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 17:24:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 17:24:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 17:24:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 17:24:32,272 INFO L87 Difference]: Start difference. First operand 1427 states and 4035 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:24:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 17:24:32,333 INFO L93 Difference]: Finished difference Result 995 states and 2712 transitions. [2021-05-21 17:24:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 17:24:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-05-21 17:24:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 17:24:32,333 INFO L225 Difference]: With dead ends: 995 [2021-05-21 17:24:32,333 INFO L226 Difference]: Without dead ends: 0 [2021-05-21 17:24:32,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 17:24:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-21 17:24:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-21 17:24:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-05-21 17:24:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-21 17:24:32,334 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-05-21 17:24:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 17:24:32,334 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-21 17:24:32,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 17:24:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-21 17:24:32,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 17:24:32,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 17:24:32,336 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 17:24:32,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 05:24:32 BasicIcfg [2021-05-21 17:24:32,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 17:24:32,338 INFO L168 Benchmark]: Toolchain (without parser) took 3967.55 ms. Allocated memory was 341.8 MB in the beginning and 889.2 MB in the end (delta: 547.4 MB). Free memory was 304.4 MB in the beginning and 663.9 MB in the end (delta: -359.5 MB). Peak memory consumption was 191.0 MB. Max. memory is 16.0 GB. [2021-05-21 17:24:32,338 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory was 322.3 MB in the beginning and 322.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 17:24:32,338 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.32 ms. Allocated memory is still 341.8 MB. Free memory was 304.1 MB in the beginning and 303.4 MB in the end (delta: 663.5 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. [2021-05-21 17:24:32,339 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.04 ms. Allocated memory is still 341.8 MB. Free memory was 303.4 MB in the beginning and 301.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 17:24:32,339 INFO L168 Benchmark]: Boogie Preprocessor took 12.82 ms. Allocated memory is still 341.8 MB. Free memory was 301.4 MB in the beginning and 300.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 17:24:32,339 INFO L168 Benchmark]: RCFGBuilder took 297.22 ms. Allocated memory is still 341.8 MB. Free memory was 300.3 MB in the beginning and 275.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-05-21 17:24:32,339 INFO L168 Benchmark]: TraceAbstraction took 3291.79 ms. Allocated memory was 341.8 MB in the beginning and 889.2 MB in the end (delta: 547.4 MB). Free memory was 274.1 MB in the beginning and 663.9 MB in the end (delta: -389.8 MB). Peak memory consumption was 160.7 MB. Max. memory is 16.0 GB. [2021-05-21 17:24:32,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory was 322.3 MB in the beginning and 322.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 332.32 ms. Allocated memory is still 341.8 MB. Free memory was 304.1 MB in the beginning and 303.4 MB in the end (delta: 663.5 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.04 ms. Allocated memory is still 341.8 MB. Free memory was 303.4 MB in the beginning and 301.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.82 ms. Allocated memory is still 341.8 MB. Free memory was 301.4 MB in the beginning and 300.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 297.22 ms. Allocated memory is still 341.8 MB. Free memory was 300.3 MB in the beginning and 275.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3291.79 ms. Allocated memory was 341.8 MB in the beginning and 889.2 MB in the end (delta: 547.4 MB). Free memory was 274.1 MB in the beginning and 663.9 MB in the end (delta: -389.8 MB). Peak memory consumption was 160.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 103 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3230.2ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 97.3ms, AutomataDifference: 1294.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 280.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 858 SDtfs, 1386 SDslu, 3131 SDs, 0 SdLazy, 336 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 198.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 919.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8007occurred in iteration=0, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 566.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 2930 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.8ms SsaConstructionTime, 150.5ms SatisfiabilityAnalysisTime, 656.5ms InterpolantComputationTime, 418 NumberOfCodeBlocks, 418 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 410 ConstructedInterpolants, 0 QuantifiedInterpolants, 1548 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...