/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 19:54:05,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 19:54:05,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 19:54:05,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 19:54:05,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 19:54:05,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 19:54:05,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 19:54:05,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 19:54:05,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 19:54:05,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 19:54:05,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 19:54:05,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 19:54:05,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 19:54:05,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 19:54:05,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 19:54:05,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 19:54:05,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 19:54:05,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 19:54:05,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 19:54:05,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 19:54:05,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-24 19:54:05,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 19:54:05,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 19:54:05,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 19:54:05,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 19:54:05,170 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 19:54:05,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 19:54:05,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 19:54:05,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 19:54:05,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 19:54:05,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 19:54:05,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 19:54:05,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 19:54:05,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 19:54:05,172 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 19:54:05,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 19:54:05,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 19:54:05,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 19:54:05,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 19:54:05,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 19:54:05,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 19:54:05,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 19:54:05,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 19:54:05,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 19:54:05,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 19:54:05,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 19:54:05,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 19:54:05,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 19:54:05,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 19:54:05,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 19:54:05,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 19:54:05,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 19:54:05,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 19:54:05,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 19:54:05,543 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 19:54:05,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i [2021-03-24 19:54:05,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776d71be9/69654a0a058e45f698c2595842ed6d28/FLAGff7068249 [2021-03-24 19:54:06,479 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 19:54:06,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i [2021-03-24 19:54:06,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776d71be9/69654a0a058e45f698c2595842ed6d28/FLAGff7068249 [2021-03-24 19:54:06,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776d71be9/69654a0a058e45f698c2595842ed6d28 [2021-03-24 19:54:06,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 19:54:06,926 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 19:54:06,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 19:54:06,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 19:54:06,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 19:54:06,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 07:54:06" (1/1) ... [2021-03-24 19:54:06,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742691ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:06, skipping insertion in model container [2021-03-24 19:54:06,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 07:54:06" (1/1) ... [2021-03-24 19:54:06,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 19:54:06,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 19:54:07,086 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i[950,963] [2021-03-24 19:54:07,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 19:54:07,237 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 19:54:07,249 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc.i[950,963] [2021-03-24 19:54:07,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 19:54:07,352 INFO L208 MainTranslator]: Completed translation [2021-03-24 19:54:07,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07 WrapperNode [2021-03-24 19:54:07,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 19:54:07,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 19:54:07,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 19:54:07,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 19:54:07,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 19:54:07,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 19:54:07,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 19:54:07,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 19:54:07,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (1/1) ... [2021-03-24 19:54:07,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 19:54:07,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 19:54:07,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 19:54:07,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 19:54:07,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (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 [2021-03-24 19:54:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 19:54:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 19:54:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 19:54:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 19:54:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-24 19:54:07,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-24 19:54:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-24 19:54:07,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-24 19:54:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-24 19:54:07,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-24 19:54:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2021-03-24 19:54:07,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2021-03-24 19:54:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-24 19:54:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 19:54:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 19:54:07,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 19:54:07,486 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 19:54:07,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 19:54:07,828 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-24 19:54:07,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 07:54:07 BoogieIcfgContainer [2021-03-24 19:54:07,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 19:54:07,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 19:54:07,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 19:54:07,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 19:54:07,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 07:54:06" (1/3) ... [2021-03-24 19:54:07,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b12ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 07:54:07, skipping insertion in model container [2021-03-24 19:54:07,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:07" (2/3) ... [2021-03-24 19:54:07,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b12ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 07:54:07, skipping insertion in model container [2021-03-24 19:54:07,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 07:54:07" (3/3) ... [2021-03-24 19:54:07,839 INFO L111 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc.i [2021-03-24 19:54:07,845 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 19:54:07,849 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 19:54:07,850 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 19:54:07,888 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,888 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,888 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,888 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,889 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,889 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,889 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,889 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,889 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,889 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,890 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,891 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,891 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,891 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,894 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,894 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,895 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,895 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,896 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,896 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,896 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,897 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,897 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,897 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,897 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,897 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,897 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,898 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,899 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,899 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,899 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,900 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,900 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,900 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,900 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,900 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,901 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,901 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,901 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,901 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,901 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,901 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,903 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,903 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,904 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,904 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,908 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,909 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,909 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,909 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,912 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,912 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,912 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,912 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,915 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,915 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,916 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,916 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:07,917 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 19:54:07,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 19:54:07,960 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 19:54:07,960 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 19:54:07,960 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 19:54:07,960 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 19:54:07,960 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 19:54:07,960 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 19:54:07,960 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 19:54:07,961 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 19:54:07,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 97 places, 86 transitions, 192 flow [2021-03-24 19:54:08,042 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2021-03-24 19:54:08,042 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:08,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 82 events. 2/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2021-03-24 19:54:08,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 86 transitions, 192 flow [2021-03-24 19:54:08,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 68 transitions, 148 flow [2021-03-24 19:54:08,067 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 19:54:08,076 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 68 transitions, 148 flow [2021-03-24 19:54:08,080 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 68 transitions, 148 flow [2021-03-24 19:54:08,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 68 transitions, 148 flow [2021-03-24 19:54:08,094 INFO L129 PetriNetUnfolder]: 1/68 cut-off events. [2021-03-24 19:54:08,095 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:08,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 68 events. 1/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2021-03-24 19:54:08,101 INFO L142 LiptonReduction]: Number of co-enabled transitions 1250 [2021-03-24 19:54:09,508 INFO L154 LiptonReduction]: Checked pairs total: 1269 [2021-03-24 19:54:09,508 INFO L156 LiptonReduction]: Total number of compositions: 43 [2021-03-24 19:54:09,510 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1444 [2021-03-24 19:54:09,520 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 19:54:09,520 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:09,520 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:09,521 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:09,521 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2002329809, now seen corresponding path program 1 times [2021-03-24 19:54:09,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:09,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74708415] [2021-03-24 19:54:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:09,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:09,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:09,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:09,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74708415] [2021-03-24 19:54:09,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:09,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 19:54:09,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018414812] [2021-03-24 19:54:09,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 19:54:09,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 19:54:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 19:54:09,801 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 129 [2021-03-24 19:54:09,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2021-03-24 19:54:09,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:09,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 129 [2021-03-24 19:54:09,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:09,817 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-24 19:54:09,817 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:09,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 25 events. 0/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 19:54:09,818 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 1 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2021-03-24 19:54:09,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 68 flow [2021-03-24 19:54:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 19:54:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 19:54:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2021-03-24 19:54:09,829 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.917312661498708 [2021-03-24 19:54:09,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2021-03-24 19:54:09,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2021-03-24 19:54:09,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:09,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2021-03-24 19:54:09,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2021-03-24 19:54:09,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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) [2021-03-24 19:54:09,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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) [2021-03-24 19:54:09,842 INFO L185 Difference]: Start difference. First operand has 38 places, 25 transitions, 62 flow. Second operand 3 states and 355 transitions. [2021-03-24 19:54:09,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 68 flow [2021-03-24 19:54:09,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 64 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 19:54:09,846 INFO L241 Difference]: Finished difference. Result has 37 places, 25 transitions, 66 flow [2021-03-24 19:54:09,848 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2021-03-24 19:54:09,849 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2021-03-24 19:54:09,849 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 66 flow [2021-03-24 19:54:09,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2021-03-24 19:54:09,849 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:09,849 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:09,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 19:54:09,850 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash 233500185, now seen corresponding path program 1 times [2021-03-24 19:54:09,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:09,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663848442] [2021-03-24 19:54:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:09,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:09,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:09,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:09,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:09,946 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-24 19:54:09,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-24 19:54:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:09,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663848442] [2021-03-24 19:54:09,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:09,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:09,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150410021] [2021-03-24 19:54:09,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:09,959 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 129 [2021-03-24 19:54:09,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 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) [2021-03-24 19:54:09,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:09,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 129 [2021-03-24 19:54:09,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:09,999 INFO L129 PetriNetUnfolder]: 28/103 cut-off events. [2021-03-24 19:54:09,999 INFO L130 PetriNetUnfolder]: For 26/59 co-relation queries the response was YES. [2021-03-24 19:54:10,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 103 events. 28/103 cut-off events. For 26/59 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 388 event pairs, 7 based on Foata normal form. 5/100 useless extension candidates. Maximal degree in co-relation 187. Up to 46 conditions per place. [2021-03-24 19:54:10,001 INFO L132 encePairwiseOnDemand]: 121/129 looper letters, 8 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2021-03-24 19:54:10,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 31 transitions, 114 flow [2021-03-24 19:54:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2021-03-24 19:54:10,007 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8391472868217055 [2021-03-24 19:54:10,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2021-03-24 19:54:10,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2021-03-24 19:54:10,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2021-03-24 19:54:10,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 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) [2021-03-24 19:54:10,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,015 INFO L185 Difference]: Start difference. First operand has 37 places, 25 transitions, 66 flow. Second operand 4 states and 433 transitions. [2021-03-24 19:54:10,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 31 transitions, 114 flow [2021-03-24 19:54:10,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 19:54:10,016 INFO L241 Difference]: Finished difference. Result has 40 places, 28 transitions, 101 flow [2021-03-24 19:54:10,016 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2021-03-24 19:54:10,017 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2021-03-24 19:54:10,017 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 101 flow [2021-03-24 19:54:10,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 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) [2021-03-24 19:54:10,018 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,018 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 19:54:10,018 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1749898176, now seen corresponding path program 1 times [2021-03-24 19:54:10,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709472080] [2021-03-24 19:54:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:10,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,114 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-24 19:54:10,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-24 19:54:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:10,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709472080] [2021-03-24 19:54:10,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:10,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:10,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920473259] [2021-03-24 19:54:10,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:10,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:10,128 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 129 [2021-03-24 19:54:10,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 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) [2021-03-24 19:54:10,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:10,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 129 [2021-03-24 19:54:10,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:10,176 INFO L129 PetriNetUnfolder]: 22/88 cut-off events. [2021-03-24 19:54:10,176 INFO L130 PetriNetUnfolder]: For 72/178 co-relation queries the response was YES. [2021-03-24 19:54:10,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 88 events. 22/88 cut-off events. For 72/178 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 309 event pairs, 2 based on Foata normal form. 4/85 useless extension candidates. Maximal degree in co-relation 225. Up to 40 conditions per place. [2021-03-24 19:54:10,177 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 9 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2021-03-24 19:54:10,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 158 flow [2021-03-24 19:54:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2021-03-24 19:54:10,183 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8410852713178295 [2021-03-24 19:54:10,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2021-03-24 19:54:10,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2021-03-24 19:54:10,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2021-03-24 19:54:10,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2021-03-24 19:54:10,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,189 INFO L185 Difference]: Start difference. First operand has 40 places, 28 transitions, 101 flow. Second operand 4 states and 434 transitions. [2021-03-24 19:54:10,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 158 flow [2021-03-24 19:54:10,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 19:54:10,192 INFO L241 Difference]: Finished difference. Result has 42 places, 30 transitions, 124 flow [2021-03-24 19:54:10,192 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2021-03-24 19:54:10,192 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2021-03-24 19:54:10,192 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 124 flow [2021-03-24 19:54:10,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 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) [2021-03-24 19:54:10,192 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,193 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 19:54:10,193 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash -651382393, now seen corresponding path program 1 times [2021-03-24 19:54:10,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573058737] [2021-03-24 19:54:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:10,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,261 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,271 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-24 19:54:10,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-24 19:54:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:10,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573058737] [2021-03-24 19:54:10,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:10,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 19:54:10,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391086773] [2021-03-24 19:54:10,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 19:54:10,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:10,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 19:54:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-24 19:54:10,285 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 129 [2021-03-24 19:54:10,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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) [2021-03-24 19:54:10,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:10,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 129 [2021-03-24 19:54:10,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:10,342 INFO L129 PetriNetUnfolder]: 22/107 cut-off events. [2021-03-24 19:54:10,343 INFO L130 PetriNetUnfolder]: For 127/290 co-relation queries the response was YES. [2021-03-24 19:54:10,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 107 events. 22/107 cut-off events. For 127/290 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 455 event pairs, 8 based on Foata normal form. 10/110 useless extension candidates. Maximal degree in co-relation 293. Up to 45 conditions per place. [2021-03-24 19:54:10,346 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 9 selfloop transitions, 8 changer transitions 5/38 dead transitions. [2021-03-24 19:54:10,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 205 flow [2021-03-24 19:54:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 19:54:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 19:54:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2021-03-24 19:54:10,348 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8372093023255814 [2021-03-24 19:54:10,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2021-03-24 19:54:10,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2021-03-24 19:54:10,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2021-03-24 19:54:10,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2021-03-24 19:54:10,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-03-24 19:54:10,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-03-24 19:54:10,354 INFO L185 Difference]: Start difference. First operand has 42 places, 30 transitions, 124 flow. Second operand 5 states and 540 transitions. [2021-03-24 19:54:10,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 205 flow [2021-03-24 19:54:10,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 19:54:10,357 INFO L241 Difference]: Finished difference. Result has 47 places, 31 transitions, 153 flow [2021-03-24 19:54:10,357 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2021-03-24 19:54:10,357 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2021-03-24 19:54:10,357 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 153 flow [2021-03-24 19:54:10,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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) [2021-03-24 19:54:10,358 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,358 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 19:54:10,358 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash -243194329, now seen corresponding path program 1 times [2021-03-24 19:54:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058062279] [2021-03-24 19:54:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:10,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,437 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-24 19:54:10,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-24 19:54:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:10,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058062279] [2021-03-24 19:54:10,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:10,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:10,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940385738] [2021-03-24 19:54:10,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:10,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:10,452 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 129 [2021-03-24 19:54:10,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 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) [2021-03-24 19:54:10,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:10,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 129 [2021-03-24 19:54:10,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:10,486 INFO L129 PetriNetUnfolder]: 8/65 cut-off events. [2021-03-24 19:54:10,487 INFO L130 PetriNetUnfolder]: For 135/160 co-relation queries the response was YES. [2021-03-24 19:54:10,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 65 events. 8/65 cut-off events. For 135/160 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 198 event pairs, 1 based on Foata normal form. 11/76 useless extension candidates. Maximal degree in co-relation 188. Up to 25 conditions per place. [2021-03-24 19:54:10,488 INFO L132 encePairwiseOnDemand]: 124/129 looper letters, 10 selfloop transitions, 7 changer transitions 1/34 dead transitions. [2021-03-24 19:54:10,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 34 transitions, 206 flow [2021-03-24 19:54:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2021-03-24 19:54:10,490 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8352713178294574 [2021-03-24 19:54:10,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2021-03-24 19:54:10,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2021-03-24 19:54:10,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2021-03-24 19:54:10,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 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) [2021-03-24 19:54:10,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,494 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,494 INFO L185 Difference]: Start difference. First operand has 47 places, 31 transitions, 153 flow. Second operand 4 states and 431 transitions. [2021-03-24 19:54:10,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 34 transitions, 206 flow [2021-03-24 19:54:10,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 34 transitions, 189 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 19:54:10,502 INFO L241 Difference]: Finished difference. Result has 50 places, 32 transitions, 169 flow [2021-03-24 19:54:10,502 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=50, PETRI_TRANSITIONS=32} [2021-03-24 19:54:10,507 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2021-03-24 19:54:10,507 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 32 transitions, 169 flow [2021-03-24 19:54:10,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 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) [2021-03-24 19:54:10,507 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,507 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 19:54:10,508 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2098327741, now seen corresponding path program 2 times [2021-03-24 19:54:10,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933091853] [2021-03-24 19:54:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:10,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,544 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:10,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933091853] [2021-03-24 19:54:10,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:10,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:10,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173248986] [2021-03-24 19:54:10,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:10,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:10,552 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2021-03-24 19:54:10,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 32 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 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) [2021-03-24 19:54:10,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:10,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2021-03-24 19:54:10,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:10,580 INFO L129 PetriNetUnfolder]: 15/106 cut-off events. [2021-03-24 19:54:10,580 INFO L130 PetriNetUnfolder]: For 245/266 co-relation queries the response was YES. [2021-03-24 19:54:10,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 106 events. 15/106 cut-off events. For 245/266 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 480 event pairs, 5 based on Foata normal form. 12/117 useless extension candidates. Maximal degree in co-relation 298. Up to 37 conditions per place. [2021-03-24 19:54:10,581 INFO L132 encePairwiseOnDemand]: 124/129 looper letters, 5 selfloop transitions, 5 changer transitions 4/38 dead transitions. [2021-03-24 19:54:10,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 38 transitions, 232 flow [2021-03-24 19:54:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2021-03-24 19:54:10,583 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8817829457364341 [2021-03-24 19:54:10,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2021-03-24 19:54:10,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2021-03-24 19:54:10,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2021-03-24 19:54:10,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 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) [2021-03-24 19:54:10,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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) [2021-03-24 19:54:10,586 INFO L185 Difference]: Start difference. First operand has 50 places, 32 transitions, 169 flow. Second operand 4 states and 455 transitions. [2021-03-24 19:54:10,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 38 transitions, 232 flow [2021-03-24 19:54:10,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 206 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-03-24 19:54:10,590 INFO L241 Difference]: Finished difference. Result has 52 places, 32 transitions, 169 flow [2021-03-24 19:54:10,590 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2021-03-24 19:54:10,590 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2021-03-24 19:54:10,590 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 169 flow [2021-03-24 19:54:10,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 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) [2021-03-24 19:54:10,591 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,591 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 19:54:10,591 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1227025223, now seen corresponding path program 1 times [2021-03-24 19:54:10,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85725776] [2021-03-24 19:54:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:10,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,659 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:10,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:10,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:10,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85725776] [2021-03-24 19:54:10,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:10,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 19:54:10,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529739342] [2021-03-24 19:54:10,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:10,668 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 129 [2021-03-24 19:54:10,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 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) [2021-03-24 19:54:10,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:10,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 129 [2021-03-24 19:54:10,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:10,766 INFO L129 PetriNetUnfolder]: 376/687 cut-off events. [2021-03-24 19:54:10,766 INFO L130 PetriNetUnfolder]: For 624/637 co-relation queries the response was YES. [2021-03-24 19:54:10,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 687 events. 376/687 cut-off events. For 624/637 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 4012 event pairs, 195 based on Foata normal form. 57/663 useless extension candidates. Maximal degree in co-relation 1607. Up to 482 conditions per place. [2021-03-24 19:54:10,773 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 10 selfloop transitions, 10 changer transitions 0/45 dead transitions. [2021-03-24 19:54:10,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 235 flow [2021-03-24 19:54:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 19:54:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 19:54:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2021-03-24 19:54:10,774 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8248062015503876 [2021-03-24 19:54:10,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2021-03-24 19:54:10,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2021-03-24 19:54:10,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2021-03-24 19:54:10,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 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) [2021-03-24 19:54:10,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-03-24 19:54:10,778 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-03-24 19:54:10,778 INFO L185 Difference]: Start difference. First operand has 52 places, 32 transitions, 169 flow. Second operand 5 states and 532 transitions. [2021-03-24 19:54:10,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 235 flow [2021-03-24 19:54:10,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 213 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-24 19:54:10,782 INFO L241 Difference]: Finished difference. Result has 54 places, 41 transitions, 222 flow [2021-03-24 19:54:10,782 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2021-03-24 19:54:10,782 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2021-03-24 19:54:10,782 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 222 flow [2021-03-24 19:54:10,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 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) [2021-03-24 19:54:10,782 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,783 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 19:54:10,783 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1450615535, now seen corresponding path program 1 times [2021-03-24 19:54:10,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599502332] [2021-03-24 19:54:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:10,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:10,840 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:10,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:10,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:10,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:10,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599502332] [2021-03-24 19:54:10,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:10,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 19:54:10,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617567868] [2021-03-24 19:54:10,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 19:54:10,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 19:54:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-24 19:54:10,852 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 129 [2021-03-24 19:54:10,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 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) [2021-03-24 19:54:10,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:10,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 129 [2021-03-24 19:54:10,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:10,958 INFO L129 PetriNetUnfolder]: 322/634 cut-off events. [2021-03-24 19:54:10,959 INFO L130 PetriNetUnfolder]: For 827/1859 co-relation queries the response was YES. [2021-03-24 19:54:10,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 634 events. 322/634 cut-off events. For 827/1859 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 3735 event pairs, 64 based on Foata normal form. 163/743 useless extension candidates. Maximal degree in co-relation 2436. Up to 517 conditions per place. [2021-03-24 19:54:10,964 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 10 selfloop transitions, 19 changer transitions 0/54 dead transitions. [2021-03-24 19:54:10,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 356 flow [2021-03-24 19:54:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 19:54:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 19:54:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 745 transitions. [2021-03-24 19:54:10,966 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8250276854928018 [2021-03-24 19:54:10,966 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 745 transitions. [2021-03-24 19:54:10,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 745 transitions. [2021-03-24 19:54:10,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:10,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 745 transitions. [2021-03-24 19:54:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.42857142857143) internal successors, (745), 7 states have internal predecessors, (745), 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) [2021-03-24 19:54:10,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-03-24 19:54:10,971 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-03-24 19:54:10,971 INFO L185 Difference]: Start difference. First operand has 54 places, 41 transitions, 222 flow. Second operand 7 states and 745 transitions. [2021-03-24 19:54:10,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 356 flow [2021-03-24 19:54:10,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 19:54:10,978 INFO L241 Difference]: Finished difference. Result has 62 places, 50 transitions, 351 flow [2021-03-24 19:54:10,978 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=351, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2021-03-24 19:54:10,978 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2021-03-24 19:54:10,978 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 351 flow [2021-03-24 19:54:10,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 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) [2021-03-24 19:54:10,979 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:10,979 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:10,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 19:54:10,979 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1795770706, now seen corresponding path program 1 times [2021-03-24 19:54:10,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:10,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852289728] [2021-03-24 19:54:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:11,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:11,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,044 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:11,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:11,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852289728] [2021-03-24 19:54:11,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:11,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 19:54:11,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544099128] [2021-03-24 19:54:11,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 19:54:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 19:54:11,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 19:54:11,055 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 129 [2021-03-24 19:54:11,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 351 flow. Second operand has 6 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 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) [2021-03-24 19:54:11,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:11,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 129 [2021-03-24 19:54:11,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:11,186 INFO L129 PetriNetUnfolder]: 256/538 cut-off events. [2021-03-24 19:54:11,187 INFO L130 PetriNetUnfolder]: For 2332/5188 co-relation queries the response was YES. [2021-03-24 19:54:11,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 538 events. 256/538 cut-off events. For 2332/5188 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 3196 event pairs, 8 based on Foata normal form. 258/751 useless extension candidates. Maximal degree in co-relation 2961. Up to 468 conditions per place. [2021-03-24 19:54:11,192 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 6 selfloop transitions, 28 changer transitions 4/63 dead transitions. [2021-03-24 19:54:11,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 553 flow [2021-03-24 19:54:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 19:54:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 19:54:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 958 transitions. [2021-03-24 19:54:11,195 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8251507321274764 [2021-03-24 19:54:11,195 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 958 transitions. [2021-03-24 19:54:11,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 958 transitions. [2021-03-24 19:54:11,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:11,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 958 transitions. [2021-03-24 19:54:11,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.44444444444444) internal successors, (958), 9 states have internal predecessors, (958), 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) [2021-03-24 19:54:11,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 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) [2021-03-24 19:54:11,200 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 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) [2021-03-24 19:54:11,200 INFO L185 Difference]: Start difference. First operand has 62 places, 50 transitions, 351 flow. Second operand 9 states and 958 transitions. [2021-03-24 19:54:11,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 553 flow [2021-03-24 19:54:11,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 503 flow, removed 17 selfloop flow, removed 3 redundant places. [2021-03-24 19:54:11,210 INFO L241 Difference]: Finished difference. Result has 70 places, 59 transitions, 479 flow [2021-03-24 19:54:11,210 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=479, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2021-03-24 19:54:11,210 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2021-03-24 19:54:11,210 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 479 flow [2021-03-24 19:54:11,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 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) [2021-03-24 19:54:11,211 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:11,211 INFO L263 CegarLoopForPetriNet]: 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] [2021-03-24 19:54:11,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 19:54:11,211 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 607181977, now seen corresponding path program 1 times [2021-03-24 19:54:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:11,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731471517] [2021-03-24 19:54:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:11,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:11,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,256 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-24 19:54:11,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-24 19:54:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:11,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731471517] [2021-03-24 19:54:11,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:11,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 19:54:11,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104353259] [2021-03-24 19:54:11,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 19:54:11,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 19:54:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-24 19:54:11,270 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 129 [2021-03-24 19:54:11,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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) [2021-03-24 19:54:11,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:11,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 129 [2021-03-24 19:54:11,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:11,383 INFO L129 PetriNetUnfolder]: 275/586 cut-off events. [2021-03-24 19:54:11,384 INFO L130 PetriNetUnfolder]: For 3846/4581 co-relation queries the response was YES. [2021-03-24 19:54:11,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3160 conditions, 586 events. 275/586 cut-off events. For 3846/4581 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 3683 event pairs, 9 based on Foata normal form. 11/539 useless extension candidates. Maximal degree in co-relation 3123. Up to 397 conditions per place. [2021-03-24 19:54:11,389 INFO L132 encePairwiseOnDemand]: 123/129 looper letters, 10 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2021-03-24 19:54:11,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 61 transitions, 523 flow [2021-03-24 19:54:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 19:54:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 19:54:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2021-03-24 19:54:11,391 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8294573643410853 [2021-03-24 19:54:11,391 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2021-03-24 19:54:11,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2021-03-24 19:54:11,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:11,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2021-03-24 19:54:11,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 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) [2021-03-24 19:54:11,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2021-03-24 19:54:11,395 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2021-03-24 19:54:11,395 INFO L185 Difference]: Start difference. First operand has 70 places, 59 transitions, 479 flow. Second operand 6 states and 642 transitions. [2021-03-24 19:54:11,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 61 transitions, 523 flow [2021-03-24 19:54:11,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 61 transitions, 426 flow, removed 34 selfloop flow, removed 4 redundant places. [2021-03-24 19:54:11,426 INFO L241 Difference]: Finished difference. Result has 72 places, 59 transitions, 401 flow [2021-03-24 19:54:11,427 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2021-03-24 19:54:11,427 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2021-03-24 19:54:11,427 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 401 flow [2021-03-24 19:54:11,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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) [2021-03-24 19:54:11,428 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:11,428 INFO L263 CegarLoopForPetriNet]: 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] [2021-03-24 19:54:11,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 19:54:11,429 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1254435249, now seen corresponding path program 2 times [2021-03-24 19:54:11,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:11,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607768265] [2021-03-24 19:54:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:11,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:11,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,495 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,500 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,505 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:11,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:11,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:11,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607768265] [2021-03-24 19:54:11,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:11,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-24 19:54:11,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624817319] [2021-03-24 19:54:11,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 19:54:11,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 19:54:11,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-24 19:54:11,518 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 129 [2021-03-24 19:54:11,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 401 flow. Second operand has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 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) [2021-03-24 19:54:11,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:11,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 129 [2021-03-24 19:54:11,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:11,672 INFO L129 PetriNetUnfolder]: 251/540 cut-off events. [2021-03-24 19:54:11,673 INFO L130 PetriNetUnfolder]: For 1890/3019 co-relation queries the response was YES. [2021-03-24 19:54:11,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 540 events. 251/540 cut-off events. For 1890/3019 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 3310 event pairs, 1 based on Foata normal form. 278/762 useless extension candidates. Maximal degree in co-relation 2371. Up to 180 conditions per place. [2021-03-24 19:54:11,676 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 2 selfloop transitions, 30 changer transitions 12/64 dead transitions. [2021-03-24 19:54:11,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 64 transitions, 535 flow [2021-03-24 19:54:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-24 19:54:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-03-24 19:54:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1163 transitions. [2021-03-24 19:54:11,679 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8195912614517266 [2021-03-24 19:54:11,679 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1163 transitions. [2021-03-24 19:54:11,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1163 transitions. [2021-03-24 19:54:11,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:11,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1163 transitions. [2021-03-24 19:54:11,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.72727272727273) internal successors, (1163), 11 states have internal predecessors, (1163), 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) [2021-03-24 19:54:11,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 129.0) internal successors, (1548), 12 states have internal predecessors, (1548), 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) [2021-03-24 19:54:11,685 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 129.0) internal successors, (1548), 12 states have internal predecessors, (1548), 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) [2021-03-24 19:54:11,685 INFO L185 Difference]: Start difference. First operand has 72 places, 59 transitions, 401 flow. Second operand 11 states and 1163 transitions. [2021-03-24 19:54:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 64 transitions, 535 flow [2021-03-24 19:54:11,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 64 transitions, 512 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-24 19:54:11,700 INFO L241 Difference]: Finished difference. Result has 80 places, 52 transitions, 412 flow [2021-03-24 19:54:11,700 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=412, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2021-03-24 19:54:11,700 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2021-03-24 19:54:11,700 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 412 flow [2021-03-24 19:54:11,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 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) [2021-03-24 19:54:11,700 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:11,701 INFO L263 CegarLoopForPetriNet]: 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] [2021-03-24 19:54:11,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 19:54:11,701 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash 182157520, now seen corresponding path program 1 times [2021-03-24 19:54:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:11,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877187028] [2021-03-24 19:54:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:11,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:11,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:11,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:11,741 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-24 19:54:11,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-24 19:54:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:11,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877187028] [2021-03-24 19:54:11,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:11,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:11,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224354801] [2021-03-24 19:54:11,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:11,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:11,752 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 129 [2021-03-24 19:54:11,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 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) [2021-03-24 19:54:11,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:11,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 129 [2021-03-24 19:54:11,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:11,795 INFO L129 PetriNetUnfolder]: 99/259 cut-off events. [2021-03-24 19:54:11,796 INFO L130 PetriNetUnfolder]: For 885/1019 co-relation queries the response was YES. [2021-03-24 19:54:11,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 259 events. 99/259 cut-off events. For 885/1019 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 1409 event pairs, 0 based on Foata normal form. 3/238 useless extension candidates. Maximal degree in co-relation 1131. Up to 75 conditions per place. [2021-03-24 19:54:11,797 INFO L132 encePairwiseOnDemand]: 121/129 looper letters, 0 selfloop transitions, 0 changer transitions 52/52 dead transitions. [2021-03-24 19:54:11,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 52 transitions, 436 flow [2021-03-24 19:54:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 19:54:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 19:54:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 512 transitions. [2021-03-24 19:54:11,799 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7937984496124031 [2021-03-24 19:54:11,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 512 transitions. [2021-03-24 19:54:11,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 512 transitions. [2021-03-24 19:54:11,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:11,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 512 transitions. [2021-03-24 19:54:11,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 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) [2021-03-24 19:54:11,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-03-24 19:54:11,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-03-24 19:54:11,802 INFO L185 Difference]: Start difference. First operand has 80 places, 52 transitions, 412 flow. Second operand 5 states and 512 transitions. [2021-03-24 19:54:11,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 52 transitions, 436 flow [2021-03-24 19:54:11,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 52 transitions, 311 flow, removed 25 selfloop flow, removed 17 redundant places. [2021-03-24 19:54:11,811 INFO L241 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2021-03-24 19:54:11,811 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2021-03-24 19:54:11,811 INFO L343 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2021-03-24 19:54:11,811 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2021-03-24 19:54:11,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 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) [2021-03-24 19:54:11,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 19:54:11,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 07:54:11 BasicIcfg [2021-03-24 19:54:11,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 19:54:11,816 INFO L168 Benchmark]: Toolchain (without parser) took 4889.43 ms. Allocated memory was 255.9 MB in the beginning and 432.0 MB in the end (delta: 176.2 MB). Free memory was 234.5 MB in the beginning and 291.8 MB in the end (delta: -57.3 MB). Peak memory consumption was 117.5 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:11,819 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 19:54:11,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 425.43 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 234.5 MB in the beginning and 320.7 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:11,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 358.6 MB. Free memory was 320.7 MB in the beginning and 318.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:11,821 INFO L168 Benchmark]: Boogie Preprocessor took 31.73 ms. Allocated memory is still 358.6 MB. Free memory was 318.6 MB in the beginning and 317.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:11,821 INFO L168 Benchmark]: RCFGBuilder took 410.12 ms. Allocated memory is still 358.6 MB. Free memory was 317.1 MB in the beginning and 293.4 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:11,821 INFO L168 Benchmark]: TraceAbstraction took 3982.06 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 292.7 MB in the beginning and 291.8 MB in the end (delta: 889.1 kB). Peak memory consumption was 75.0 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:11,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 425.43 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 234.5 MB in the beginning and 320.7 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.89 ms. Allocated memory is still 358.6 MB. Free memory was 320.7 MB in the beginning and 318.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.73 ms. Allocated memory is still 358.6 MB. Free memory was 318.6 MB in the beginning and 317.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 410.12 ms. Allocated memory is still 358.6 MB. Free memory was 317.1 MB in the beginning and 293.4 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3982.06 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 292.7 MB in the beginning and 291.8 MB in the end (delta: 889.1 kB). Peak memory consumption was 75.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1428.3ms, 80 PlacesBefore, 38 PlacesAfterwards, 68 TransitionsBefore, 25 TransitionsAfterwards, 1250 CoEnabledTransitionPairs, 4 FixpointIterations, 14 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 43 TotalNumberOfCompositions, 1269 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 878, positive: 850, positive conditional: 0, positive unconditional: 850, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 747, positive: 723, positive conditional: 0, positive unconditional: 723, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 747, positive: 723, positive conditional: 0, positive unconditional: 723, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 747, positive: 707, positive conditional: 0, positive unconditional: 707, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 40, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 183, positive: 82, positive conditional: 0, positive unconditional: 82, negative: 100, negative conditional: 0, negative unconditional: 100, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 878, positive: 127, positive conditional: 0, positive unconditional: 127, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 747, unknown conditional: 0, unknown unconditional: 747] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - 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 CFG has 5 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3857.0ms, OverallIterations: 12, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1148.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1554.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 73 SDtfs, 53 SDslu, 60 SDs, 0 SdLazy, 247 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 182.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 194.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=479occurred in iteration=9, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.6ms SsaConstructionTime, 239.9ms SatisfiabilityAnalysisTime, 684.3ms InterpolantComputationTime, 233 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 221 ConstructedInterpolants, 0 QuantifiedInterpolants, 1059 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...