/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 17:16:11,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 17:16:11,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 17:16:11,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 17:16:11,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 17:16:11,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 17:16:11,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 17:16:11,082 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 [2021-06-12 17:16:11,274 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 17:16:11,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 17:16:11,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 17:16:11,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 17:16:11,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 17:16:11,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 17:16:11,275 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 17:16:11,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 17:16:11,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 17:16:11,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 17:16:11,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 17:16:11,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 17:16:11,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 17:16:11,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 17:16:11,305 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 17:16:11,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 17:16:11,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 17:16:11,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 17:16:11,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 17:16:11,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 17:16:11,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 17:16:11,545 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 17:16:11,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_tso.opt.i [2021-06-12 17:16:11,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7968b035e/7cd04bd255df4be7a1ef44ebfac94b76/FLAG549f2347d [2021-06-12 17:16:11,993 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 17:16:11,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_tso.opt.i [2021-06-12 17:16:12,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7968b035e/7cd04bd255df4be7a1ef44ebfac94b76/FLAG549f2347d [2021-06-12 17:16:12,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7968b035e/7cd04bd255df4be7a1ef44ebfac94b76 [2021-06-12 17:16:12,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 17:16:12,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 17:16:12,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 17:16:12,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 17:16:12,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 17:16:12,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103c378a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12, skipping insertion in model container [2021-06-12 17:16:12,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 17:16:12,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 17:16:12,557 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/safe009_tso.opt.i[949,962] [2021-06-12 17:16:12,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 17:16:12,660 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 17:16:12,669 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/safe009_tso.opt.i[949,962] [2021-06-12 17:16:12,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 17:16:12,752 INFO L208 MainTranslator]: Completed translation [2021-06-12 17:16:12,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12 WrapperNode [2021-06-12 17:16:12,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 17:16:12,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 17:16:12,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 17:16:12,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 17:16:12,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 17:16:12,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 17:16:12,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 17:16:12,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 17:16:12,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... [2021-06-12 17:16:12,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 17:16:12,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 17:16:12,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 17:16:12,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 17:16:12,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 17:16:12,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-06-12 17:16:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-06-12 17:16:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-06-12 17:16:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 17:16:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 17:16:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 17:16:12,878 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 17:16:13,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 17:16:13,167 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-06-12 17:16:13,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:16:13 BoogieIcfgContainer [2021-06-12 17:16:13,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 17:16:13,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 17:16:13,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 17:16:13,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 17:16:13,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 05:16:12" (1/3) ... [2021-06-12 17:16:13,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609bc472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:16:13, skipping insertion in model container [2021-06-12 17:16:13,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 05:16:12" (2/3) ... [2021-06-12 17:16:13,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609bc472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:16:13, skipping insertion in model container [2021-06-12 17:16:13,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:16:13" (3/3) ... [2021-06-12 17:16:13,175 INFO L111 eAbstractionObserver]: Analyzing ICFG safe009_tso.opt.i [2021-06-12 17:16:13,181 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 17:16:13,181 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 17:16:13,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 17:16:13,182 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 17:16:13,206 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,207 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,208 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,208 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,208 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,208 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,208 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,209 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,209 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,209 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,209 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,209 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,210 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,210 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,211 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,212 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,212 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,212 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,212 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,212 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,215 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,215 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,215 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,216 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,216 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,216 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,216 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,217 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,218 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,219 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,219 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,219 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,223 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,224 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,224 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,224 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,225 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,225 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,225 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,225 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 17:16:13,227 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 17:16:13,241 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 17:16:13,280 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 17:16:13,281 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 17:16:13,281 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 17:16:13,281 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 17:16:13,281 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 17:16:13,281 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 17:16:13,281 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 17:16:13,281 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 17:16:13,291 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 90 places, 82 transitions, 179 flow [2021-06-12 17:16:13,664 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8057 states, 8055 states have (on average 3.532588454376164) internal successors, (28455), 8056 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 8057 states, 8055 states have (on average 3.532588454376164) internal successors, (28455), 8056 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 17:16:13,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:13,724 INFO L472 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] [2021-06-12 17:16:13,725 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:13,728 INFO L82 PathProgramCache]: Analyzing trace with hash -710190392, now seen corresponding path program 1 times [2021-06-12 17:16:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:13,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461520383] [2021-06-12 17:16:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:14,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461520383] [2021-06-12 17:16:14,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461520383] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:14,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:14,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 17:16:14,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139361379] [2021-06-12 17:16:14,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 17:16:14,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 17:16:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 17:16:14,093 INFO L87 Difference]: Start difference. First operand has 8057 states, 8055 states have (on average 3.532588454376164) internal successors, (28455), 8056 states have internal predecessors, (28455), 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 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:14,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:14,495 INFO L93 Difference]: Finished difference Result 16603 states and 56511 transitions. [2021-06-12 17:16:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 17:16:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 48 [2021-06-12 17:16:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:14,532 INFO L225 Difference]: With dead ends: 16603 [2021-06-12 17:16:14,532 INFO L226 Difference]: Without dead ends: 5653 [2021-06-12 17:16:14,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-12 17:16:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2021-06-12 17:16:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 4741. [2021-06-12 17:16:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4740 states have (on average 3.2978902953586497) internal successors, (15632), 4740 states have internal predecessors, (15632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 15632 transitions. [2021-06-12 17:16:14,771 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 15632 transitions. Word has length 48 [2021-06-12 17:16:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:14,772 INFO L482 AbstractCegarLoop]: Abstraction has 4741 states and 15632 transitions. [2021-06-12 17:16:14,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 15632 transitions. [2021-06-12 17:16:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 17:16:14,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:14,781 INFO L472 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] [2021-06-12 17:16:14,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 17:16:14,781 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash -157935543, now seen corresponding path program 1 times [2021-06-12 17:16:14,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:14,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64470256] [2021-06-12 17:16:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:14,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:14,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64470256] [2021-06-12 17:16:14,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64470256] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:14,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:14,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 17:16:14,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988253603] [2021-06-12 17:16:14,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 17:16:14,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 17:16:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 17:16:14,917 INFO L87 Difference]: Start difference. First operand 4741 states and 15632 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:15,216 INFO L93 Difference]: Finished difference Result 7472 states and 24362 transitions. [2021-06-12 17:16:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 17:16:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 50 [2021-06-12 17:16:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:15,241 INFO L225 Difference]: With dead ends: 7472 [2021-06-12 17:16:15,241 INFO L226 Difference]: Without dead ends: 5712 [2021-06-12 17:16:15,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 17:16:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5712 states. [2021-06-12 17:16:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5712 to 4800. [2021-06-12 17:16:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4800 states, 4799 states have (on average 3.2890185455303187) internal successors, (15784), 4799 states have internal predecessors, (15784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4800 states to 4800 states and 15784 transitions. [2021-06-12 17:16:15,387 INFO L78 Accepts]: Start accepts. Automaton has 4800 states and 15784 transitions. Word has length 50 [2021-06-12 17:16:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:15,387 INFO L482 AbstractCegarLoop]: Abstraction has 4800 states and 15784 transitions. [2021-06-12 17:16:15,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4800 states and 15784 transitions. [2021-06-12 17:16:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 17:16:15,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:15,398 INFO L472 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] [2021-06-12 17:16:15,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 17:16:15,398 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1470695374, now seen corresponding path program 1 times [2021-06-12 17:16:15,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:15,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923417022] [2021-06-12 17:16:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:15,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923417022] [2021-06-12 17:16:15,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923417022] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:15,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:15,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 17:16:15,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672551331] [2021-06-12 17:16:15,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 17:16:15,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 17:16:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 17:16:15,495 INFO L87 Difference]: Start difference. First operand 4800 states and 15784 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) [2021-06-12 17:16:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:15,673 INFO L93 Difference]: Finished difference Result 6780 states and 22016 transitions. [2021-06-12 17:16:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 17:16:15,675 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 [2021-06-12 17:16:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:15,701 INFO L225 Difference]: With dead ends: 6780 [2021-06-12 17:16:15,701 INFO L226 Difference]: Without dead ends: 3545 [2021-06-12 17:16:15,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 17:16:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2021-06-12 17:16:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3225. [2021-06-12 17:16:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.240694789081886) internal successors, (10448), 3224 states have internal predecessors, (10448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 10448 transitions. [2021-06-12 17:16:15,773 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 10448 transitions. Word has length 52 [2021-06-12 17:16:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:15,774 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 10448 transitions. [2021-06-12 17:16:15,774 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) [2021-06-12 17:16:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 10448 transitions. [2021-06-12 17:16:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 17:16:15,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:15,780 INFO L472 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] [2021-06-12 17:16:15,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 17:16:15,780 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1238873360, now seen corresponding path program 1 times [2021-06-12 17:16:15,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:15,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717878382] [2021-06-12 17:16:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:15,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:15,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717878382] [2021-06-12 17:16:15,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717878382] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:15,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:15,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 17:16:15,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342298552] [2021-06-12 17:16:15,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 17:16:15,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:15,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 17:16:15,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 17:16:15,885 INFO L87 Difference]: Start difference. First operand 3225 states and 10448 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 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) [2021-06-12 17:16:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:16,019 INFO L93 Difference]: Finished difference Result 5161 states and 16596 transitions. [2021-06-12 17:16:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 17:16:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 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 [2021-06-12 17:16:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:16,026 INFO L225 Difference]: With dead ends: 5161 [2021-06-12 17:16:16,026 INFO L226 Difference]: Without dead ends: 3465 [2021-06-12 17:16:16,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-12 17:16:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-06-12 17:16:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2985. [2021-06-12 17:16:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2984 states have (on average 3.1943699731903483) internal successors, (9532), 2984 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 9532 transitions. [2021-06-12 17:16:16,081 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 9532 transitions. Word has length 53 [2021-06-12 17:16:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:16,082 INFO L482 AbstractCegarLoop]: Abstraction has 2985 states and 9532 transitions. [2021-06-12 17:16:16,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 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) [2021-06-12 17:16:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 9532 transitions. [2021-06-12 17:16:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 17:16:16,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:16,088 INFO L472 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] [2021-06-12 17:16:16,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 17:16:16,088 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:16,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash -230361873, now seen corresponding path program 1 times [2021-06-12 17:16:16,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:16,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954598877] [2021-06-12 17:16:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:16,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:16,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954598877] [2021-06-12 17:16:16,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954598877] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:16,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:16,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 17:16:16,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25028399] [2021-06-12 17:16:16,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 17:16:16,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 17:16:16,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 17:16:16,172 INFO L87 Difference]: Start difference. First operand 2985 states and 9532 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) [2021-06-12 17:16:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:16,266 INFO L93 Difference]: Finished difference Result 3393 states and 10686 transitions. [2021-06-12 17:16:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 17:16:16,266 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 [2021-06-12 17:16:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:16,269 INFO L225 Difference]: With dead ends: 3393 [2021-06-12 17:16:16,269 INFO L226 Difference]: Without dead ends: 1183 [2021-06-12 17:16:16,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 17:16:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-12 17:16:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1183. [2021-06-12 17:16:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.020304568527919) internal successors, (3570), 1182 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3570 transitions. [2021-06-12 17:16:16,288 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3570 transitions. Word has length 54 [2021-06-12 17:16:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:16,288 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3570 transitions. [2021-06-12 17:16:16,288 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) [2021-06-12 17:16:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3570 transitions. [2021-06-12 17:16:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 17:16:16,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:16,290 INFO L472 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] [2021-06-12 17:16:16,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 17:16:16,290 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:16,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1721608039, now seen corresponding path program 1 times [2021-06-12 17:16:16,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:16,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607393905] [2021-06-12 17:16:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:16,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607393905] [2021-06-12 17:16:16,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607393905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:16,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:16,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 17:16:16,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872052944] [2021-06-12 17:16:16,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 17:16:16,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 17:16:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 17:16:16,342 INFO L87 Difference]: Start difference. First operand 1183 states and 3570 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:16,410 INFO L93 Difference]: Finished difference Result 1388 states and 4133 transitions. [2021-06-12 17:16:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 17:16:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 55 [2021-06-12 17:16:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:16,413 INFO L225 Difference]: With dead ends: 1388 [2021-06-12 17:16:16,413 INFO L226 Difference]: Without dead ends: 1068 [2021-06-12 17:16:16,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 17:16:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-12 17:16:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2021-06-12 17:16:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 2.980318650421743) internal successors, (3180), 1067 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3180 transitions. [2021-06-12 17:16:16,429 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3180 transitions. Word has length 55 [2021-06-12 17:16:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:16,429 INFO L482 AbstractCegarLoop]: Abstraction has 1068 states and 3180 transitions. [2021-06-12 17:16:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3180 transitions. [2021-06-12 17:16:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 17:16:16,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:16,430 INFO L472 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] [2021-06-12 17:16:16,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 17:16:16,431 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1625570487, now seen corresponding path program 1 times [2021-06-12 17:16:16,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:16,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333620215] [2021-06-12 17:16:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:16,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:16,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333620215] [2021-06-12 17:16:16,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333620215] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:16,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:16,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 17:16:16,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263499502] [2021-06-12 17:16:16,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 17:16:16,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:16,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 17:16:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 17:16:16,484 INFO L87 Difference]: Start difference. First operand 1068 states and 3180 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) [2021-06-12 17:16:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:16,570 INFO L93 Difference]: Finished difference Result 960 states and 2760 transitions. [2021-06-12 17:16:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 17:16:16,570 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 [2021-06-12 17:16:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:16,572 INFO L225 Difference]: With dead ends: 960 [2021-06-12 17:16:16,572 INFO L226 Difference]: Without dead ends: 708 [2021-06-12 17:16:16,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 17:16:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-12 17:16:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 708. [2021-06-12 17:16:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.8217821782178216) internal successors, (1995), 707 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1995 transitions. [2021-06-12 17:16:16,583 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1995 transitions. Word has length 56 [2021-06-12 17:16:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:16,583 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 1995 transitions. [2021-06-12 17:16:16,583 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) [2021-06-12 17:16:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1995 transitions. [2021-06-12 17:16:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 17:16:16,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 17:16:16,584 INFO L472 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, 1] [2021-06-12 17:16:16,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 17:16:16,584 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 17:16:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 17:16:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -255944118, now seen corresponding path program 1 times [2021-06-12 17:16:16,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 17:16:16,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595721236] [2021-06-12 17:16:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 17:16:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 17:16:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 17:16:16,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 17:16:16,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595721236] [2021-06-12 17:16:16,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595721236] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 17:16:16,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 17:16:16,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 17:16:16,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905701751] [2021-06-12 17:16:16,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 17:16:16,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 17:16:16,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 17:16:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 17:16:16,652 INFO L87 Difference]: Start difference. First operand 708 states and 1995 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 17:16:16,704 INFO L93 Difference]: Finished difference Result 411 states and 1104 transitions. [2021-06-12 17:16:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 17:16:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 57 [2021-06-12 17:16:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 17:16:16,705 INFO L225 Difference]: With dead ends: 411 [2021-06-12 17:16:16,705 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 17:16:16,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 17:16:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 17:16:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 17:16:16,705 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) [2021-06-12 17:16:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 17:16:16,706 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2021-06-12 17:16:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 17:16:16,706 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 17:16:16,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 17:16:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 17:16:16,706 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 17:16:16,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 17:16:16,708 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 17:16:16,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 05:16:16 BasicIcfg [2021-06-12 17:16:16,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 17:16:16,710 INFO L168 Benchmark]: Toolchain (without parser) took 4316.87 ms. Allocated memory was 187.7 MB in the beginning and 404.8 MB in the end (delta: 217.1 MB). Free memory was 151.0 MB in the beginning and 257.8 MB in the end (delta: -106.9 MB). Peak memory consumption was 111.6 MB. Max. memory is 8.0 GB. [2021-06-12 17:16:16,710 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 187.7 MB. Free memory is still 169.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 17:16:16,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.92 ms. Allocated memory is still 187.7 MB. Free memory was 150.8 MB in the beginning and 149.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 17:16:16,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 187.7 MB. Free memory was 149.0 MB in the beginning and 146.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 17:16:16,711 INFO L168 Benchmark]: Boogie Preprocessor took 13.11 ms. Allocated memory is still 187.7 MB. Free memory was 146.9 MB in the beginning and 145.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 17:16:16,711 INFO L168 Benchmark]: RCFGBuilder took 360.82 ms. Allocated memory is still 187.7 MB. Free memory was 145.8 MB in the beginning and 122.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-06-12 17:16:16,711 INFO L168 Benchmark]: TraceAbstraction took 3539.57 ms. Allocated memory was 187.7 MB in the beginning and 404.8 MB in the end (delta: 217.1 MB). Free memory was 122.2 MB in the beginning and 257.8 MB in the end (delta: -135.6 MB). Peak memory consumption was 82.5 MB. Max. memory is 8.0 GB. [2021-06-12 17:16:16,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 187.7 MB. Free memory is still 169.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 358.92 ms. Allocated memory is still 187.7 MB. Free memory was 150.8 MB in the beginning and 149.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 187.7 MB. Free memory was 149.0 MB in the beginning and 146.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.11 ms. Allocated memory is still 187.7 MB. Free memory was 146.9 MB in the beginning and 145.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.82 ms. Allocated memory is still 187.7 MB. Free memory was 145.8 MB in the beginning and 122.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3539.57 ms. Allocated memory was 187.7 MB in the beginning and 404.8 MB in the end (delta: 217.1 MB). Free memory was 122.2 MB in the beginning and 257.8 MB in the end (delta: -135.6 MB). Peak memory consumption was 82.5 MB. Max. memory is 8.0 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 104 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3428.1ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 92.7ms, AutomataDifference: 1449.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 383.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 794 SDtfs, 1316 SDslu, 2807 SDs, 0 SdLazy, 327 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 202.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 820.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8057occurred in iteration=0, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 544.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 2624 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 24.9ms SsaConstructionTime, 123.4ms SatisfiabilityAnalysisTime, 674.1ms InterpolantComputationTime, 425 NumberOfCodeBlocks, 425 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 417 ConstructedInterpolants, 0 QuantifiedInterpolants, 1757 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...