/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 05:06:19,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 05:06:19,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 05:06:19,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 05:06:19,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 05:06:19,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 05:06:19,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 05:06:19,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 05:06:19,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 05:06:19,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 05:06:19,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 05:06:19,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 05:06:19,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 05:06:19,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 05:06:19,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 05:06:19,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 05:06:19,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 05:06:19,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 05:06:19,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 05:06:19,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 05:06:19,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 05:06:19,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 05:06:19,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 05:06:19,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 05:06:19,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 05:06:19,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 05:06:19,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 05:06:19,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 05:06:19,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 05:06:19,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 05:06:19,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 05:06:19,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 05:06:19,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 05:06:19,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 05:06:19,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 05:06:19,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 05:06:19,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 05:06:19,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 05:06:19,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 05:06:19,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 05:06:19,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 05:06:19,195 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-SemanticLooper.epf [2020-10-16 05:06:19,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 05:06:19,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 05:06:19,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 05:06:19,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 05:06:19,219 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 05:06:19,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 05:06:19,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 05:06:19,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 05:06:19,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 05:06:19,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 05:06:19,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 05:06:19,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 05:06:19,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 05:06:19,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 05:06:19,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 05:06:19,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 05:06:19,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 05:06:19,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 05:06:19,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 05:06:19,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 05:06:19,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 05:06:19,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:06:19,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 05:06:19,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 05:06:19,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 05:06:19,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 05:06:19,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 05:06:19,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 05:06:19,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 05:06:19,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 05:06:19,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 05:06:19,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 05:06:19,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 05:06:19,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 05:06:19,558 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_tso.oepc.i [2020-10-16 05:06:19,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e059ef2a/c471dc63f4104d67a5e86c113d212660/FLAGd60503519 [2020-10-16 05:06:20,153 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 05:06:20,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_tso.oepc.i [2020-10-16 05:06:20,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e059ef2a/c471dc63f4104d67a5e86c113d212660/FLAGd60503519 [2020-10-16 05:06:20,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e059ef2a/c471dc63f4104d67a5e86c113d212660 [2020-10-16 05:06:20,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 05:06:20,486 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 05:06:20,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 05:06:20,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 05:06:20,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 05:06:20,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:06:20" (1/1) ... [2020-10-16 05:06:20,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd39ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:20, skipping insertion in model container [2020-10-16 05:06:20,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:06:20" (1/1) ... [2020-10-16 05:06:20,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 05:06:20,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 05:06:21,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:06:21,087 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 05:06:21,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:06:21,343 INFO L208 MainTranslator]: Completed translation [2020-10-16 05:06:21,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21 WrapperNode [2020-10-16 05:06:21,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 05:06:21,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 05:06:21,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 05:06:21,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 05:06:21,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 05:06:21,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 05:06:21,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 05:06:21,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 05:06:21,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... [2020-10-16 05:06:21,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 05:06:21,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 05:06:21,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 05:06:21,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 05:06:21,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:06:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 05:06:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 05:06:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 05:06:21,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 05:06:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 05:06:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 05:06:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 05:06:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 05:06:21,504 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 05:06:21,505 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 05:06:21,505 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-10-16 05:06:21,505 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-10-16 05:06:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 05:06:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 05:06:21,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 05:06:21,508 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 05:06:21,926 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 05:06:21,926 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 05:06:21,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:06:21 BoogieIcfgContainer [2020-10-16 05:06:21,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 05:06:21,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 05:06:21,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 05:06:21,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 05:06:21,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:06:20" (1/3) ... [2020-10-16 05:06:21,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729457de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:06:21, skipping insertion in model container [2020-10-16 05:06:21,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:06:21" (2/3) ... [2020-10-16 05:06:21,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729457de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:06:21, skipping insertion in model container [2020-10-16 05:06:21,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:06:21" (3/3) ... [2020-10-16 05:06:21,937 INFO L111 eAbstractionObserver]: Analyzing ICFG safe019_tso.oepc.i [2020-10-16 05:06:21,949 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 05:06:21,956 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 05:06:21,957 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 05:06:21,987 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,987 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,987 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,988 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,988 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,988 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,989 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,989 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,989 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,989 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,990 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,990 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,991 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,991 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,992 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,992 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,992 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,993 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,993 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,993 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,993 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,993 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,997 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,997 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,998 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:21,998 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,004 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,004 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,004 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,005 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,007 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,008 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,008 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,008 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,010 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,011 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,011 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,011 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:06:22,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-16 05:06:22,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:06:22,052 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:06:22,052 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:06:22,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:06:22,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:06:22,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:06:22,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:06:22,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:06:22,067 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 92 places, 81 transitions, 182 flow [2020-10-16 05:06:22,115 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-10-16 05:06:22,115 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:06:22,121 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-10-16 05:06:22,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 81 transitions, 182 flow [2020-10-16 05:06:22,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 64 transitions, 140 flow [2020-10-16 05:06:22,130 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:06:22,133 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 64 transitions, 140 flow [2020-10-16 05:06:22,136 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 64 transitions, 140 flow [2020-10-16 05:06:22,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 76 places, 64 transitions, 140 flow [2020-10-16 05:06:22,159 INFO L129 PetriNetUnfolder]: 1/64 cut-off events. [2020-10-16 05:06:22,159 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:06:22,160 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 1/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-16 05:06:22,163 INFO L117 LiptonReduction]: Number of co-enabled transitions 1250 [2020-10-16 05:06:23,622 INFO L132 LiptonReduction]: Checked pairs total: 1949 [2020-10-16 05:06:23,622 INFO L134 LiptonReduction]: Total number of compositions: 46 [2020-10-16 05:06:23,625 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1497 [2020-10-16 05:06:23,634 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-10-16 05:06:23,634 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:06:23,634 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:23,636 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:23,636 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 651694145, now seen corresponding path program 1 times [2020-10-16 05:06:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:23,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101118046] [2020-10-16 05:06:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:23,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101118046] [2020-10-16 05:06:23,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:23,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:06:23,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860456737] [2020-10-16 05:06:23,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:06:23,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:06:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:06:23,935 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 127 [2020-10-16 05:06:23,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 20 transitions, 52 flow. Second operand 3 states. [2020-10-16 05:06:23,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:23,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 127 [2020-10-16 05:06:23,939 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:23,961 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2020-10-16 05:06:23,961 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:06:23,962 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 20 events. 0/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2020-10-16 05:06:23,963 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 1 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2020-10-16 05:06:23,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 20 transitions, 58 flow [2020-10-16 05:06:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:06:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:06:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2020-10-16 05:06:23,981 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8766404199475065 [2020-10-16 05:06:23,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2020-10-16 05:06:23,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2020-10-16 05:06:23,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:23,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2020-10-16 05:06:23,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:06:23,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:06:23,999 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:06:24,001 INFO L185 Difference]: Start difference. First operand has 33 places, 20 transitions, 52 flow. Second operand 3 states and 334 transitions. [2020-10-16 05:06:24,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 20 transitions, 58 flow [2020-10-16 05:06:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 20 transitions, 54 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-16 05:06:24,008 INFO L241 Difference]: Finished difference. Result has 32 places, 20 transitions, 56 flow [2020-10-16 05:06:24,011 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2020-10-16 05:06:24,012 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2020-10-16 05:06:24,012 INFO L481 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 56 flow [2020-10-16 05:06:24,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:06:24,012 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,013 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 05:06:24,013 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash -184313190, now seen corresponding path program 1 times [2020-10-16 05:06:24,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620307561] [2020-10-16 05:06:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:24,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620307561] [2020-10-16 05:06:24,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:24,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:06:24,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833823280] [2020-10-16 05:06:24,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:06:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:06:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:06:24,115 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 127 [2020-10-16 05:06:24,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 56 flow. Second operand 4 states. [2020-10-16 05:06:24,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:24,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 127 [2020-10-16 05:06:24,116 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:24,161 INFO L129 PetriNetUnfolder]: 6/45 cut-off events. [2020-10-16 05:06:24,161 INFO L130 PetriNetUnfolder]: For 8/10 co-relation queries the response was YES. [2020-10-16 05:06:24,162 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 45 events. 6/45 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 130 event pairs, 0 based on Foata normal form. 4/47 useless extension candidates. Maximal degree in co-relation 79. Up to 11 conditions per place. [2020-10-16 05:06:24,163 INFO L132 encePairwiseOnDemand]: 122/127 looper letters, 5 selfloop transitions, 4 changer transitions 1/25 dead transitions. [2020-10-16 05:06:24,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 89 flow [2020-10-16 05:06:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:06:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:06:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 424 transitions. [2020-10-16 05:06:24,167 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8346456692913385 [2020-10-16 05:06:24,167 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 424 transitions. [2020-10-16 05:06:24,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 424 transitions. [2020-10-16 05:06:24,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:24,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 424 transitions. [2020-10-16 05:06:24,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:06:24,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:06:24,172 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:06:24,172 INFO L185 Difference]: Start difference. First operand has 32 places, 20 transitions, 56 flow. Second operand 4 states and 424 transitions. [2020-10-16 05:06:24,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 89 flow [2020-10-16 05:06:24,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 25 transitions, 83 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 05:06:24,174 INFO L241 Difference]: Finished difference. Result has 35 places, 22 transitions, 78 flow [2020-10-16 05:06:24,174 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=22} [2020-10-16 05:06:24,175 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2020-10-16 05:06:24,175 INFO L481 AbstractCegarLoop]: Abstraction has has 35 places, 22 transitions, 78 flow [2020-10-16 05:06:24,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:06:24,176 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,176 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 05:06:24,176 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash -787763169, now seen corresponding path program 1 times [2020-10-16 05:06:24,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147979384] [2020-10-16 05:06:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147979384] [2020-10-16 05:06:24,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:24,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:06:24,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979938506] [2020-10-16 05:06:24,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:06:24,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:06:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:06:24,227 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 127 [2020-10-16 05:06:24,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 22 transitions, 78 flow. Second operand 3 states. [2020-10-16 05:06:24,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:24,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 127 [2020-10-16 05:06:24,228 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:24,240 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2020-10-16 05:06:24,240 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2020-10-16 05:06:24,241 INFO L80 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 31 events. 3/31 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 65 event pairs, 1 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 62. Up to 10 conditions per place. [2020-10-16 05:06:24,241 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 1 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2020-10-16 05:06:24,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 22 transitions, 84 flow [2020-10-16 05:06:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:06:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:06:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2020-10-16 05:06:24,243 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8766404199475065 [2020-10-16 05:06:24,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2020-10-16 05:06:24,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2020-10-16 05:06:24,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:24,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2020-10-16 05:06:24,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:06:24,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:06:24,247 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:06:24,247 INFO L185 Difference]: Start difference. First operand has 35 places, 22 transitions, 78 flow. Second operand 3 states and 334 transitions. [2020-10-16 05:06:24,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 22 transitions, 84 flow [2020-10-16 05:06:24,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 22 transitions, 75 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-16 05:06:24,249 INFO L241 Difference]: Finished difference. Result has 35 places, 22 transitions, 77 flow [2020-10-16 05:06:24,249 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=22} [2020-10-16 05:06:24,249 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2020-10-16 05:06:24,250 INFO L481 AbstractCegarLoop]: Abstraction has has 35 places, 22 transitions, 77 flow [2020-10-16 05:06:24,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:06:24,250 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,250 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 05:06:24,250 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1367500132, now seen corresponding path program 1 times [2020-10-16 05:06:24,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23812006] [2020-10-16 05:06:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23812006] [2020-10-16 05:06:24,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:24,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:06:24,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444732937] [2020-10-16 05:06:24,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:06:24,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:06:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:06:24,294 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 127 [2020-10-16 05:06:24,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 22 transitions, 77 flow. Second operand 4 states. [2020-10-16 05:06:24,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:24,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 127 [2020-10-16 05:06:24,295 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:24,326 INFO L129 PetriNetUnfolder]: 0/40 cut-off events. [2020-10-16 05:06:24,327 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2020-10-16 05:06:24,327 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 0/40 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 120 event pairs, 0 based on Foata normal form. 4/44 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2020-10-16 05:06:24,327 INFO L132 encePairwiseOnDemand]: 123/127 looper letters, 4 selfloop transitions, 3 changer transitions 2/24 dead transitions. [2020-10-16 05:06:24,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 24 transitions, 102 flow [2020-10-16 05:06:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:06:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:06:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 526 transitions. [2020-10-16 05:06:24,330 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8283464566929134 [2020-10-16 05:06:24,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 526 transitions. [2020-10-16 05:06:24,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 526 transitions. [2020-10-16 05:06:24,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:24,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 526 transitions. [2020-10-16 05:06:24,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:06:24,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:06:24,334 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:06:24,334 INFO L185 Difference]: Start difference. First operand has 35 places, 22 transitions, 77 flow. Second operand 5 states and 526 transitions. [2020-10-16 05:06:24,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 24 transitions, 102 flow [2020-10-16 05:06:24,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 05:06:24,336 INFO L241 Difference]: Finished difference. Result has 40 places, 22 transitions, 90 flow [2020-10-16 05:06:24,337 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=22} [2020-10-16 05:06:24,337 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2020-10-16 05:06:24,337 INFO L481 AbstractCegarLoop]: Abstraction has has 40 places, 22 transitions, 90 flow [2020-10-16 05:06:24,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:06:24,337 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,337 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 05:06:24,338 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1349777370, now seen corresponding path program 1 times [2020-10-16 05:06:24,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620819969] [2020-10-16 05:06:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:24,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620819969] [2020-10-16 05:06:24,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:24,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:06:24,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275891031] [2020-10-16 05:06:24,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:06:24,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:06:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:06:24,380 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 127 [2020-10-16 05:06:24,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 22 transitions, 90 flow. Second operand 4 states. [2020-10-16 05:06:24,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:24,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 127 [2020-10-16 05:06:24,381 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:24,414 INFO L129 PetriNetUnfolder]: 7/70 cut-off events. [2020-10-16 05:06:24,414 INFO L130 PetriNetUnfolder]: For 250/257 co-relation queries the response was YES. [2020-10-16 05:06:24,415 INFO L80 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 70 events. 7/70 cut-off events. For 250/257 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 299 event pairs, 2 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 161. Up to 18 conditions per place. [2020-10-16 05:06:24,415 INFO L132 encePairwiseOnDemand]: 123/127 looper letters, 4 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2020-10-16 05:06:24,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 25 transitions, 113 flow [2020-10-16 05:06:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:06:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:06:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 422 transitions. [2020-10-16 05:06:24,418 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8307086614173228 [2020-10-16 05:06:24,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 422 transitions. [2020-10-16 05:06:24,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 422 transitions. [2020-10-16 05:06:24,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:24,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 422 transitions. [2020-10-16 05:06:24,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:06:24,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:06:24,421 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:06:24,421 INFO L185 Difference]: Start difference. First operand has 40 places, 22 transitions, 90 flow. Second operand 4 states and 422 transitions. [2020-10-16 05:06:24,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 25 transitions, 113 flow [2020-10-16 05:06:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 25 transitions, 104 flow, removed 3 selfloop flow, removed 3 redundant places. [2020-10-16 05:06:24,424 INFO L241 Difference]: Finished difference. Result has 40 places, 22 transitions, 95 flow [2020-10-16 05:06:24,424 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=22} [2020-10-16 05:06:24,425 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2020-10-16 05:06:24,425 INFO L481 AbstractCegarLoop]: Abstraction has has 40 places, 22 transitions, 95 flow [2020-10-16 05:06:24,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:06:24,425 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,425 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 05:06:24,426 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash -552410563, now seen corresponding path program 1 times [2020-10-16 05:06:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780943127] [2020-10-16 05:06:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:24,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780943127] [2020-10-16 05:06:24,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:24,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:06:24,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872254699] [2020-10-16 05:06:24,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:06:24,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:24,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:06:24,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:06:24,517 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 127 [2020-10-16 05:06:24,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 22 transitions, 95 flow. Second operand 4 states. [2020-10-16 05:06:24,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:24,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 127 [2020-10-16 05:06:24,518 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:24,644 INFO L129 PetriNetUnfolder]: 185/340 cut-off events. [2020-10-16 05:06:24,644 INFO L130 PetriNetUnfolder]: For 1110/1179 co-relation queries the response was YES. [2020-10-16 05:06:24,648 INFO L80 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 340 events. 185/340 cut-off events. For 1110/1179 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1728 event pairs, 91 based on Foata normal form. 26/333 useless extension candidates. Maximal degree in co-relation 823. Up to 243 conditions per place. [2020-10-16 05:06:24,651 INFO L132 encePairwiseOnDemand]: 120/127 looper letters, 6 selfloop transitions, 5 changer transitions 9/35 dead transitions. [2020-10-16 05:06:24,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 161 flow [2020-10-16 05:06:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:06:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:06:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 507 transitions. [2020-10-16 05:06:24,653 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7984251968503937 [2020-10-16 05:06:24,653 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 507 transitions. [2020-10-16 05:06:24,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 507 transitions. [2020-10-16 05:06:24,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:24,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 507 transitions. [2020-10-16 05:06:24,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:06:24,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:06:24,657 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:06:24,657 INFO L185 Difference]: Start difference. First operand has 40 places, 22 transitions, 95 flow. Second operand 5 states and 507 transitions. [2020-10-16 05:06:24,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 161 flow [2020-10-16 05:06:24,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 149 flow, removed 2 selfloop flow, removed 4 redundant places. [2020-10-16 05:06:24,663 INFO L241 Difference]: Finished difference. Result has 43 places, 26 transitions, 128 flow [2020-10-16 05:06:24,664 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=43, PETRI_TRANSITIONS=26} [2020-10-16 05:06:24,664 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2020-10-16 05:06:24,664 INFO L481 AbstractCegarLoop]: Abstraction has has 43 places, 26 transitions, 128 flow [2020-10-16 05:06:24,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:06:24,664 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,664 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 05:06:24,667 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1324778427, now seen corresponding path program 1 times [2020-10-16 05:06:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498010675] [2020-10-16 05:06:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:24,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498010675] [2020-10-16 05:06:24,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:24,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:06:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032623167] [2020-10-16 05:06:24,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:06:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:24,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:06:24,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:06:24,791 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 127 [2020-10-16 05:06:24,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 26 transitions, 128 flow. Second operand 5 states. [2020-10-16 05:06:24,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:24,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 127 [2020-10-16 05:06:24,793 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:24,899 INFO L129 PetriNetUnfolder]: 133/266 cut-off events. [2020-10-16 05:06:24,899 INFO L130 PetriNetUnfolder]: For 913/1311 co-relation queries the response was YES. [2020-10-16 05:06:24,901 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 266 events. 133/266 cut-off events. For 913/1311 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1258 event pairs, 25 based on Foata normal form. 50/300 useless extension candidates. Maximal degree in co-relation 1050. Up to 229 conditions per place. [2020-10-16 05:06:24,903 INFO L132 encePairwiseOnDemand]: 120/127 looper letters, 6 selfloop transitions, 9 changer transitions 9/39 dead transitions. [2020-10-16 05:06:24,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 252 flow [2020-10-16 05:06:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:06:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:06:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 608 transitions. [2020-10-16 05:06:24,906 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7979002624671916 [2020-10-16 05:06:24,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 608 transitions. [2020-10-16 05:06:24,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 608 transitions. [2020-10-16 05:06:24,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:24,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 608 transitions. [2020-10-16 05:06:24,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:06:24,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:06:24,910 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:06:24,910 INFO L185 Difference]: Start difference. First operand has 43 places, 26 transitions, 128 flow. Second operand 6 states and 608 transitions. [2020-10-16 05:06:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 252 flow [2020-10-16 05:06:24,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 245 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:06:24,916 INFO L241 Difference]: Finished difference. Result has 47 places, 30 transitions, 193 flow [2020-10-16 05:06:24,916 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=47, PETRI_TRANSITIONS=30} [2020-10-16 05:06:24,916 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2020-10-16 05:06:24,917 INFO L481 AbstractCegarLoop]: Abstraction has has 47 places, 30 transitions, 193 flow [2020-10-16 05:06:24,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:06:24,917 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:24,917 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:24,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 05:06:24,917 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1209272257, now seen corresponding path program 1 times [2020-10-16 05:06:24,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:24,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459641274] [2020-10-16 05:06:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:25,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459641274] [2020-10-16 05:06:25,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:25,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 05:06:25,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433002326] [2020-10-16 05:06:25,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:06:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:25,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:06:25,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:06:25,046 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 127 [2020-10-16 05:06:25,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 30 transitions, 193 flow. Second operand 6 states. [2020-10-16 05:06:25,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:25,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 127 [2020-10-16 05:06:25,047 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:25,157 INFO L129 PetriNetUnfolder]: 74/170 cut-off events. [2020-10-16 05:06:25,158 INFO L130 PetriNetUnfolder]: For 967/1381 co-relation queries the response was YES. [2020-10-16 05:06:25,159 INFO L80 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 170 events. 74/170 cut-off events. For 967/1381 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 719 event pairs, 3 based on Foata normal form. 57/218 useless extension candidates. Maximal degree in co-relation 894. Up to 145 conditions per place. [2020-10-16 05:06:25,163 INFO L132 encePairwiseOnDemand]: 120/127 looper letters, 6 selfloop transitions, 13 changer transitions 9/43 dead transitions. [2020-10-16 05:06:25,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 375 flow [2020-10-16 05:06:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:06:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:06:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 709 transitions. [2020-10-16 05:06:25,166 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7975253093363329 [2020-10-16 05:06:25,166 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 709 transitions. [2020-10-16 05:06:25,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 709 transitions. [2020-10-16 05:06:25,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:25,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 709 transitions. [2020-10-16 05:06:25,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:06:25,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:06:25,171 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:06:25,171 INFO L185 Difference]: Start difference. First operand has 47 places, 30 transitions, 193 flow. Second operand 7 states and 709 transitions. [2020-10-16 05:06:25,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 375 flow [2020-10-16 05:06:25,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 313 flow, removed 26 selfloop flow, removed 4 redundant places. [2020-10-16 05:06:25,176 INFO L241 Difference]: Finished difference. Result has 50 places, 34 transitions, 243 flow [2020-10-16 05:06:25,176 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2020-10-16 05:06:25,177 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2020-10-16 05:06:25,177 INFO L481 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 243 flow [2020-10-16 05:06:25,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:06:25,177 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:25,177 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:25,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 05:06:25,178 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:25,178 INFO L82 PathProgramCache]: Analyzing trace with hash 188844575, now seen corresponding path program 1 times [2020-10-16 05:06:25,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:25,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34007760] [2020-10-16 05:06:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34007760] [2020-10-16 05:06:25,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:25,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-16 05:06:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412595340] [2020-10-16 05:06:25,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:06:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:06:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:06:25,288 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 127 [2020-10-16 05:06:25,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 243 flow. Second operand 7 states. [2020-10-16 05:06:25,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:25,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 127 [2020-10-16 05:06:25,289 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:25,380 INFO L129 PetriNetUnfolder]: 44/110 cut-off events. [2020-10-16 05:06:25,380 INFO L130 PetriNetUnfolder]: For 558/794 co-relation queries the response was YES. [2020-10-16 05:06:25,381 INFO L80 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 110 events. 44/110 cut-off events. For 558/794 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 408 event pairs, 0 based on Foata normal form. 56/157 useless extension candidates. Maximal degree in co-relation 556. Up to 83 conditions per place. [2020-10-16 05:06:25,382 INFO L132 encePairwiseOnDemand]: 120/127 looper letters, 2 selfloop transitions, 17 changer transitions 7/39 dead transitions. [2020-10-16 05:06:25,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 39 transitions, 347 flow [2020-10-16 05:06:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:06:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:06:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 802 transitions. [2020-10-16 05:06:25,385 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7893700787401575 [2020-10-16 05:06:25,386 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 802 transitions. [2020-10-16 05:06:25,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 802 transitions. [2020-10-16 05:06:25,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:25,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 802 transitions. [2020-10-16 05:06:25,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:06:25,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:06:25,391 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:06:25,391 INFO L185 Difference]: Start difference. First operand has 50 places, 34 transitions, 243 flow. Second operand 8 states and 802 transitions. [2020-10-16 05:06:25,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 39 transitions, 347 flow [2020-10-16 05:06:25,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 39 transitions, 285 flow, removed 22 selfloop flow, removed 5 redundant places. [2020-10-16 05:06:25,395 INFO L241 Difference]: Finished difference. Result has 53 places, 32 transitions, 226 flow [2020-10-16 05:06:25,395 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=226, PETRI_PLACES=53, PETRI_TRANSITIONS=32} [2020-10-16 05:06:25,396 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2020-10-16 05:06:25,396 INFO L481 AbstractCegarLoop]: Abstraction has has 53 places, 32 transitions, 226 flow [2020-10-16 05:06:25,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:06:25,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:06:25,396 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:06:25,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 05:06:25,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:06:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:06:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash -90365718, now seen corresponding path program 1 times [2020-10-16 05:06:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:06:25,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815764827] [2020-10-16 05:06:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:06:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:06:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:06:25,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815764827] [2020-10-16 05:06:25,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:06:25,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:06:25,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925598854] [2020-10-16 05:06:25,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:06:25,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:06:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:06:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:06:25,431 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 127 [2020-10-16 05:06:25,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 32 transitions, 226 flow. Second operand 4 states. [2020-10-16 05:06:25,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:06:25,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 127 [2020-10-16 05:06:25,432 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:06:25,451 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2020-10-16 05:06:25,451 INFO L130 PetriNetUnfolder]: For 110/130 co-relation queries the response was YES. [2020-10-16 05:06:25,452 INFO L80 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 47 events. 17/47 cut-off events. For 110/130 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 86 event pairs, 0 based on Foata normal form. 3/45 useless extension candidates. Maximal degree in co-relation 169. Up to 18 conditions per place. [2020-10-16 05:06:25,452 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2020-10-16 05:06:25,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 31 transitions, 218 flow [2020-10-16 05:06:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:06:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:06:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 417 transitions. [2020-10-16 05:06:25,455 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8208661417322834 [2020-10-16 05:06:25,455 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 417 transitions. [2020-10-16 05:06:25,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 417 transitions. [2020-10-16 05:06:25,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:06:25,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 417 transitions. [2020-10-16 05:06:25,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:06:25,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:06:25,458 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:06:25,458 INFO L185 Difference]: Start difference. First operand has 53 places, 32 transitions, 226 flow. Second operand 4 states and 417 transitions. [2020-10-16 05:06:25,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 31 transitions, 218 flow [2020-10-16 05:06:25,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 16 selfloop flow, removed 9 redundant places. [2020-10-16 05:06:25,460 INFO L241 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2020-10-16 05:06:25,460 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2020-10-16 05:06:25,460 INFO L342 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2020-10-16 05:06:25,460 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2020-10-16 05:06:25,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:06:25,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 05:06:25,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 05:06:25 BasicIcfg [2020-10-16 05:06:25,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 05:06:25,468 INFO L168 Benchmark]: Toolchain (without parser) took 4982.07 ms. Allocated memory was 248.5 MB in the beginning and 429.9 MB in the end (delta: 181.4 MB). Free memory was 203.6 MB in the beginning and 268.1 MB in the end (delta: -64.4 MB). Peak memory consumption was 117.0 MB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,469 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 248.5 MB. Free memory was 226.6 MB in the beginning and 225.7 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 857.96 ms. Allocated memory was 248.5 MB in the beginning and 358.6 MB in the end (delta: 110.1 MB). Free memory was 203.6 MB in the beginning and 321.7 MB in the end (delta: -118.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.05 ms. Allocated memory is still 358.6 MB. Free memory was 321.7 MB in the beginning and 319.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,472 INFO L168 Benchmark]: Boogie Preprocessor took 29.59 ms. Allocated memory is still 358.6 MB. Free memory was 319.2 MB in the beginning and 318.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,473 INFO L168 Benchmark]: RCFGBuilder took 496.94 ms. Allocated memory is still 358.6 MB. Free memory was 318.0 MB in the beginning and 292.5 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,473 INFO L168 Benchmark]: TraceAbstraction took 3535.90 ms. Allocated memory was 358.6 MB in the beginning and 429.9 MB in the end (delta: 71.3 MB). Free memory was 291.2 MB in the beginning and 268.1 MB in the end (delta: 23.2 MB). Peak memory consumption was 94.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:06:25,477 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 248.5 MB. Free memory was 226.6 MB in the beginning and 225.7 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 857.96 ms. Allocated memory was 248.5 MB in the beginning and 358.6 MB in the end (delta: 110.1 MB). Free memory was 203.6 MB in the beginning and 321.7 MB in the end (delta: -118.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 56.05 ms. Allocated memory is still 358.6 MB. Free memory was 321.7 MB in the beginning and 319.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.59 ms. Allocated memory is still 358.6 MB. Free memory was 319.2 MB in the beginning and 318.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.2 GB. * RCFGBuilder took 496.94 ms. Allocated memory is still 358.6 MB. Free memory was 318.0 MB in the beginning and 292.5 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 14.2 GB. * TraceAbstraction took 3535.90 ms. Allocated memory was 358.6 MB in the beginning and 429.9 MB in the end (delta: 71.3 MB). Free memory was 291.2 MB in the beginning and 268.1 MB in the end (delta: 23.2 MB). Peak memory consumption was 94.5 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 747 VarBasedMoverChecksPositive, 51 VarBasedMoverChecksNegative, 20 SemBasedMoverChecksPositive, 31 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 77 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 76 PlacesBefore, 33 PlacesAfterwards, 64 TransitionsBefore, 20 TransitionsAfterwards, 1250 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 46 TotalNumberOfCompositions, 1949 MoverChecksTotal - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 80 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 34 SDtfs, 27 SDslu, 25 SDs, 0 SdLazy, 200 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 5526 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...