/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 18:51:01,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 18:51:01,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 18:51:01,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 18:51:01,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 18:51:01,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 18:51:01,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 18:51:01,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 18:51:01,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 18:51:01,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 18:51:01,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 18:51:01,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 18:51:01,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 18:51:01,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 18:51:01,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 18:51:01,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 18:51:01,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 18:51:01,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 18:51:01,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 18:51:01,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 18:51:01,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 18:51:01,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 18:51:01,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 18:51:01,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 18:51:01,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 18:51:01,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 18:51:01,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 18:51:01,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 18:51:01,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 18:51:01,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 18:51:01,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 18:51:01,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 18:51:01,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 18:51:01,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 18:51:01,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 18:51:01,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 18:51:01,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-24 18:51:01,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 18:51:01,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 18:51:01,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 18:51:01,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 18:51:01,622 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 18:51:01,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 18:51:01,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 18:51:01,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 18:51:01,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 18:51:01,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 18:51:01,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 18:51:01,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 18:51:01,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 18:51:01,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 18:51:01,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 18:51:01,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 18:51:01,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 18:51:01,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 18:51:01,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 18:51:01,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 18:51:01,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 18:51:01,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 18:51:01,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 18:51:01,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 18:51:01,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 18:51:01,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 18:51:01,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 18:51:01,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 18:51:01,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 18:51:01,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 18:51:01,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 18:51:01,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 18:51:01,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 18:51:01,938 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 18:51:01,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-03-24 18:51:01,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec1823d2/48873343fe7e4845b0a14dc5ae481908/FLAG5608d9421 [2021-03-24 18:51:02,421 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 18:51:02,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-03-24 18:51:02,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec1823d2/48873343fe7e4845b0a14dc5ae481908/FLAG5608d9421 [2021-03-24 18:51:02,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec1823d2/48873343fe7e4845b0a14dc5ae481908 [2021-03-24 18:51:02,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 18:51:02,774 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 18:51:02,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 18:51:02,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 18:51:02,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 18:51:02,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 06:51:02" (1/1) ... [2021-03-24 18:51:02,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed4dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:02, skipping insertion in model container [2021-03-24 18:51:02,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 06:51:02" (1/1) ... [2021-03-24 18:51:02,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 18:51:02,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 18:51:03,123 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30132,30145] [2021-03-24 18:51:03,131 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30481,30494] [2021-03-24 18:51:03,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 18:51:03,142 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 18:51:03,178 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30132,30145] [2021-03-24 18:51:03,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30481,30494] [2021-03-24 18:51:03,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 18:51:03,255 INFO L208 MainTranslator]: Completed translation [2021-03-24 18:51:03,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03 WrapperNode [2021-03-24 18:51:03,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 18:51:03,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 18:51:03,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 18:51:03,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 18:51:03,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 18:51:03,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 18:51:03,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 18:51:03,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 18:51:03,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... [2021-03-24 18:51:03,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 18:51:03,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 18:51:03,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 18:51:03,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 18:51:03,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 18:51:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-03-24 18:51:03,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-03-24 18:51:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 18:51:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 18:51:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 18:51:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-24 18:51:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 18:51:03,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 18:51:03,430 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 18:51:03,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 18:51:03,744 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-03-24 18:51:03,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 06:51:03 BoogieIcfgContainer [2021-03-24 18:51:03,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 18:51:03,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 18:51:03,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 18:51:03,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 18:51:03,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 06:51:02" (1/3) ... [2021-03-24 18:51:03,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404a4814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 06:51:03, skipping insertion in model container [2021-03-24 18:51:03,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 06:51:03" (2/3) ... [2021-03-24 18:51:03,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404a4814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 06:51:03, skipping insertion in model container [2021-03-24 18:51:03,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 06:51:03" (3/3) ... [2021-03-24 18:51:03,751 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2021-03-24 18:51:03,756 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 18:51:03,759 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-24 18:51:03,760 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 18:51:03,789 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,789 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,789 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,789 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,790 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,790 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,790 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,791 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,791 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,791 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,794 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,794 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,795 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,795 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 18:51:03,798 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 18:51:03,813 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 18:51:03,832 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 18:51:03,832 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 18:51:03,832 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 18:51:03,832 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 18:51:03,832 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 18:51:03,833 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 18:51:03,833 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 18:51:03,833 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 18:51:03,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 88 transitions, 181 flow [2021-03-24 18:51:03,872 INFO L129 PetriNetUnfolder]: 24/87 cut-off events. [2021-03-24 18:51:03,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 18:51:03,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 87 events. 24/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 72. Up to 3 conditions per place. [2021-03-24 18:51:03,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 88 transitions, 181 flow [2021-03-24 18:51:03,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 87 transitions, 177 flow [2021-03-24 18:51:03,883 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 18:51:03,894 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 87 transitions, 177 flow [2021-03-24 18:51:03,896 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 87 transitions, 177 flow [2021-03-24 18:51:03,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 87 transitions, 177 flow [2021-03-24 18:51:03,916 INFO L129 PetriNetUnfolder]: 24/87 cut-off events. [2021-03-24 18:51:03,916 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 18:51:03,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 87 events. 24/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 72. Up to 3 conditions per place. [2021-03-24 18:51:03,920 INFO L142 LiptonReduction]: Number of co-enabled transitions 2542 [2021-03-24 18:51:04,801 INFO L154 LiptonReduction]: Checked pairs total: 1861 [2021-03-24 18:51:04,801 INFO L156 LiptonReduction]: Total number of compositions: 38 [2021-03-24 18:51:04,803 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 921 [2021-03-24 18:51:04,814 INFO L129 PetriNetUnfolder]: 10/44 cut-off events. [2021-03-24 18:51:04,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 18:51:04,815 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 18:51:04,815 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 18:51:04,815 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 18:51:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 18:51:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1907373222, now seen corresponding path program 1 times [2021-03-24 18:51:04,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 18:51:04,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858377758] [2021-03-24 18:51:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 18:51:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 18:51:04,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:04,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:04,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:04,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 18:51:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 18:51:04,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858377758] [2021-03-24 18:51:04,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 18:51:04,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 18:51:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723491002] [2021-03-24 18:51:04,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 18:51:04,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 18:51:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 18:51:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 18:51:04,983 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 126 [2021-03-24 18:51:04,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:04,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 18:51:04,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 126 [2021-03-24 18:51:04,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 18:51:05,026 INFO L129 PetriNetUnfolder]: 56/169 cut-off events. [2021-03-24 18:51:05,027 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 18:51:05,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 169 events. 56/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 476 event pairs, 2 based on Foata normal form. 43/165 useless extension candidates. Maximal degree in co-relation 200. Up to 24 conditions per place. [2021-03-24 18:51:05,030 INFO L132 encePairwiseOnDemand]: 115/126 looper letters, 8 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2021-03-24 18:51:05,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 125 flow [2021-03-24 18:51:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 18:51:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 18:51:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2021-03-24 18:51:05,041 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-03-24 18:51:05,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2021-03-24 18:51:05,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2021-03-24 18:51:05,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 18:51:05,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2021-03-24 18:51:05,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,053 INFO L185 Difference]: Start difference. First operand has 44 places, 56 transitions, 115 flow. Second operand 3 states and 280 transitions. [2021-03-24 18:51:05,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 125 flow [2021-03-24 18:51:05,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 18:51:05,058 INFO L241 Difference]: Finished difference. Result has 41 places, 48 transitions, 118 flow [2021-03-24 18:51:05,060 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=48} [2021-03-24 18:51:05,060 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2021-03-24 18:51:05,061 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 48 transitions, 118 flow [2021-03-24 18:51:05,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,061 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 18:51:05,061 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 18:51:05,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 18:51:05,061 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 18:51:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 18:51:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash 32955086, now seen corresponding path program 1 times [2021-03-24 18:51:05,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 18:51:05,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157027927] [2021-03-24 18:51:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 18:51:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 18:51:05,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 18:51:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 18:51:05,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157027927] [2021-03-24 18:51:05,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 18:51:05,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 18:51:05,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897407669] [2021-03-24 18:51:05,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 18:51:05,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 18:51:05,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 18:51:05,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 18:51:05,102 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 126 [2021-03-24 18:51:05,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 18:51:05,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 126 [2021-03-24 18:51:05,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 18:51:05,140 INFO L129 PetriNetUnfolder]: 46/144 cut-off events. [2021-03-24 18:51:05,141 INFO L130 PetriNetUnfolder]: For 25/29 co-relation queries the response was YES. [2021-03-24 18:51:05,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 144 events. 46/144 cut-off events. For 25/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 364 event pairs, 2 based on Foata normal form. 8/116 useless extension candidates. Maximal degree in co-relation 194. Up to 16 conditions per place. [2021-03-24 18:51:05,143 INFO L132 encePairwiseOnDemand]: 122/126 looper letters, 7 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2021-03-24 18:51:05,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 136 flow [2021-03-24 18:51:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 18:51:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 18:51:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2021-03-24 18:51:05,154 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2021-03-24 18:51:05,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2021-03-24 18:51:05,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2021-03-24 18:51:05,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 18:51:05,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2021-03-24 18:51:05,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,161 INFO L185 Difference]: Start difference. First operand has 41 places, 48 transitions, 118 flow. Second operand 3 states and 266 transitions. [2021-03-24 18:51:05,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 136 flow [2021-03-24 18:51:05,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 18:51:05,163 INFO L241 Difference]: Finished difference. Result has 42 places, 48 transitions, 122 flow [2021-03-24 18:51:05,163 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=42, PETRI_TRANSITIONS=48} [2021-03-24 18:51:05,163 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2021-03-24 18:51:05,164 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 48 transitions, 122 flow [2021-03-24 18:51:05,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,164 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 18:51:05,164 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 18:51:05,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 18:51:05,164 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 18:51:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 18:51:05,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1247473356, now seen corresponding path program 1 times [2021-03-24 18:51:05,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 18:51:05,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95338893] [2021-03-24 18:51:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 18:51:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 18:51:05,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 18:51:05,262 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-03-24 18:51:05,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 18:51:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95338893] [2021-03-24 18:51:05,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 18:51:05,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 18:51:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831286537] [2021-03-24 18:51:05,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 18:51:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 18:51:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 18:51:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 18:51:05,267 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 126 [2021-03-24 18:51:05,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 48 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 18:51:05,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 126 [2021-03-24 18:51:05,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 18:51:05,351 INFO L129 PetriNetUnfolder]: 183/421 cut-off events. [2021-03-24 18:51:05,351 INFO L130 PetriNetUnfolder]: For 33/34 co-relation queries the response was YES. [2021-03-24 18:51:05,354 INFO L84 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 421 events. 183/421 cut-off events. For 33/34 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1696 event pairs, 43 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 708. Up to 167 conditions per place. [2021-03-24 18:51:05,358 INFO L132 encePairwiseOnDemand]: 115/126 looper letters, 19 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2021-03-24 18:51:05,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 190 flow [2021-03-24 18:51:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 18:51:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 18:51:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2021-03-24 18:51:05,360 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2021-03-24 18:51:05,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2021-03-24 18:51:05,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2021-03-24 18:51:05,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 18:51:05,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2021-03-24 18:51:05,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,363 INFO L185 Difference]: Start difference. First operand has 42 places, 48 transitions, 122 flow. Second operand 3 states and 261 transitions. [2021-03-24 18:51:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 190 flow [2021-03-24 18:51:05,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 18:51:05,368 INFO L241 Difference]: Finished difference. Result has 45 places, 53 transitions, 174 flow [2021-03-24 18:51:05,369 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=45, PETRI_TRANSITIONS=53} [2021-03-24 18:51:05,369 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2021-03-24 18:51:05,369 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 53 transitions, 174 flow [2021-03-24 18:51:05,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,369 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 18:51:05,370 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 18:51:05,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 18:51:05,370 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 18:51:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 18:51:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2067548804, now seen corresponding path program 2 times [2021-03-24 18:51:05,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 18:51:05,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965937634] [2021-03-24 18:51:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 18:51:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 18:51:05,424 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 18:51:05,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 18:51:05,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965937634] [2021-03-24 18:51:05,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 18:51:05,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 18:51:05,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547233893] [2021-03-24 18:51:05,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 18:51:05,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 18:51:05,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 18:51:05,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 18:51:05,434 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 126 [2021-03-24 18:51:05,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 53 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 18:51:05,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 126 [2021-03-24 18:51:05,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 18:51:05,504 INFO L129 PetriNetUnfolder]: 217/498 cut-off events. [2021-03-24 18:51:05,505 INFO L130 PetriNetUnfolder]: For 246/249 co-relation queries the response was YES. [2021-03-24 18:51:05,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 498 events. 217/498 cut-off events. For 246/249 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2080 event pairs, 30 based on Foata normal form. 17/452 useless extension candidates. Maximal degree in co-relation 1082. Up to 143 conditions per place. [2021-03-24 18:51:05,515 INFO L132 encePairwiseOnDemand]: 116/126 looper letters, 22 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2021-03-24 18:51:05,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 272 flow [2021-03-24 18:51:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 18:51:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 18:51:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2021-03-24 18:51:05,517 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6878306878306878 [2021-03-24 18:51:05,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2021-03-24 18:51:05,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2021-03-24 18:51:05,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 18:51:05,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2021-03-24 18:51:05,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,519 INFO L185 Difference]: Start difference. First operand has 45 places, 53 transitions, 174 flow. Second operand 3 states and 260 transitions. [2021-03-24 18:51:05,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 272 flow [2021-03-24 18:51:05,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 18:51:05,526 INFO L241 Difference]: Finished difference. Result has 47 places, 58 transitions, 232 flow [2021-03-24 18:51:05,526 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=47, PETRI_TRANSITIONS=58} [2021-03-24 18:51:05,526 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2021-03-24 18:51:05,526 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 58 transitions, 232 flow [2021-03-24 18:51:05,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,526 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 18:51:05,527 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 18:51:05,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 18:51:05,527 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 18:51:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 18:51:05,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2075781436, now seen corresponding path program 3 times [2021-03-24 18:51:05,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 18:51:05,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479079197] [2021-03-24 18:51:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 18:51:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 18:51:05,566 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 18:51:05,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 18:51:05,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479079197] [2021-03-24 18:51:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 18:51:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 18:51:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578489091] [2021-03-24 18:51:05,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 18:51:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 18:51:05,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 18:51:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 18:51:05,573 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 126 [2021-03-24 18:51:05,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 58 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 18:51:05,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 126 [2021-03-24 18:51:05,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 18:51:05,629 INFO L129 PetriNetUnfolder]: 215/485 cut-off events. [2021-03-24 18:51:05,630 INFO L130 PetriNetUnfolder]: For 569/574 co-relation queries the response was YES. [2021-03-24 18:51:05,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 485 events. 215/485 cut-off events. For 569/574 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2017 event pairs, 32 based on Foata normal form. 18/434 useless extension candidates. Maximal degree in co-relation 1261. Up to 211 conditions per place. [2021-03-24 18:51:05,634 INFO L132 encePairwiseOnDemand]: 117/126 looper letters, 25 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2021-03-24 18:51:05,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 322 flow [2021-03-24 18:51:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 18:51:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 18:51:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2021-03-24 18:51:05,638 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2021-03-24 18:51:05,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2021-03-24 18:51:05,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2021-03-24 18:51:05,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 18:51:05,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2021-03-24 18:51:05,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,641 INFO L185 Difference]: Start difference. First operand has 47 places, 58 transitions, 232 flow. Second operand 3 states and 259 transitions. [2021-03-24 18:51:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 322 flow [2021-03-24 18:51:05,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 18:51:05,646 INFO L241 Difference]: Finished difference. Result has 49 places, 59 transitions, 262 flow [2021-03-24 18:51:05,646 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2021-03-24 18:51:05,647 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2021-03-24 18:51:05,647 INFO L480 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 262 flow [2021-03-24 18:51:05,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,647 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 18:51:05,647 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 18:51:05,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 18:51:05,648 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 18:51:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 18:51:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2018751236, now seen corresponding path program 4 times [2021-03-24 18:51:05,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 18:51:05,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123950524] [2021-03-24 18:51:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 18:51:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 18:51:05,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-24 18:51:05,706 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-03-24 18:51:05,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 18:51:05,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 18:51:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 18:51:05,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123950524] [2021-03-24 18:51:05,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 18:51:05,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 18:51:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973033264] [2021-03-24 18:51:05,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 18:51:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 18:51:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 18:51:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 18:51:05,712 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 126 [2021-03-24 18:51:05,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 18:51:05,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 126 [2021-03-24 18:51:05,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 18:51:05,792 INFO L129 PetriNetUnfolder]: 340/652 cut-off events. [2021-03-24 18:51:05,792 INFO L130 PetriNetUnfolder]: For 368/413 co-relation queries the response was YES. [2021-03-24 18:51:05,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 652 events. 340/652 cut-off events. For 368/413 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2659 event pairs, 42 based on Foata normal form. 6/533 useless extension candidates. Maximal degree in co-relation 1566. Up to 238 conditions per place. [2021-03-24 18:51:05,795 INFO L132 encePairwiseOnDemand]: 115/126 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2021-03-24 18:51:05,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 322 flow [2021-03-24 18:51:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 18:51:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 18:51:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2021-03-24 18:51:05,797 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2021-03-24 18:51:05,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2021-03-24 18:51:05,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2021-03-24 18:51:05,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 18:51:05,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2021-03-24 18:51:05,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,802 INFO L185 Difference]: Start difference. First operand has 49 places, 59 transitions, 262 flow. Second operand 3 states and 261 transitions. [2021-03-24 18:51:05,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 322 flow [2021-03-24 18:51:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 306 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-24 18:51:05,805 INFO L241 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2021-03-24 18:51:05,806 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2021-03-24 18:51:05,806 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2021-03-24 18:51:05,806 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2021-03-24 18:51:05,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 18:51:05,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 18:51:05,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 06:51:05 BasicIcfg [2021-03-24 18:51:05,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 18:51:05,811 INFO L168 Benchmark]: Toolchain (without parser) took 3036.50 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 234.8 MB in the beginning and 220.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 96.8 MB. Max. memory is 16.0 GB. [2021-03-24 18:51:05,812 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 18:51:05,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 479.57 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 234.8 MB in the beginning and 304.4 MB in the end (delta: -69.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-24 18:51:05,814 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.15 ms. Allocated memory is still 339.7 MB. Free memory was 304.4 MB in the beginning and 303.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 18:51:05,817 INFO L168 Benchmark]: Boogie Preprocessor took 42.29 ms. Allocated memory is still 339.7 MB. Free memory was 303.0 MB in the beginning and 301.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 18:51:05,817 INFO L168 Benchmark]: RCFGBuilder took 391.93 ms. Allocated memory is still 339.7 MB. Free memory was 301.6 MB in the beginning and 279.9 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-24 18:51:05,818 INFO L168 Benchmark]: TraceAbstraction took 2063.45 ms. Allocated memory is still 339.7 MB. Free memory was 279.3 MB in the beginning and 220.5 MB in the end (delta: 58.8 MB). Peak memory consumption was 60.9 MB. Max. memory is 16.0 GB. [2021-03-24 18:51:05,823 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 479.57 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 234.8 MB in the beginning and 304.4 MB in the end (delta: -69.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 52.15 ms. Allocated memory is still 339.7 MB. Free memory was 304.4 MB in the beginning and 303.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 42.29 ms. Allocated memory is still 339.7 MB. Free memory was 303.0 MB in the beginning and 301.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 391.93 ms. Allocated memory is still 339.7 MB. Free memory was 301.6 MB in the beginning and 279.9 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2063.45 ms. Allocated memory is still 339.7 MB. Free memory was 279.3 MB in the beginning and 220.5 MB in the end (delta: 58.8 MB). Peak memory consumption was 60.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 904.5ms, 67 PlacesBefore, 44 PlacesAfterwards, 87 TransitionsBefore, 56 TransitionsAfterwards, 2542 CoEnabledTransitionPairs, 4 FixpointIterations, 10 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 38 TotalNumberOfCompositions, 1861 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 821, positive: 781, positive conditional: 0, positive unconditional: 781, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 694, positive: 675, positive conditional: 0, positive unconditional: 675, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 694, positive: 675, positive conditional: 0, positive unconditional: 675, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 694, positive: 663, positive conditional: 0, positive unconditional: 663, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 93, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 58, negative conditional: 0, negative unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 821, positive: 106, positive conditional: 0, positive unconditional: 106, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 694, unknown conditional: 0, unknown unconditional: 694] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 65 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1979.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 512.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 974.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 88 SDtfs, 20 SDslu, 0 SDs, 0 SdLazy, 98 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=5, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.8ms SsaConstructionTime, 84.8ms SatisfiabilityAnalysisTime, 221.6ms InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 161 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...