/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 20:14:31,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 20:14:31,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 20:14:31,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 20:14:31,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 20:14:31,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 20:14:31,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 20:14:31,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 20:14:31,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 20:14:31,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 20:14:31,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 20:14:31,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 20:14:31,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 20:14:31,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 20:14:31,689 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 20:14:31,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 20:14:31,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 20:14:31,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 20:14:31,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 20:14:31,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 20:14:31,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 20:14:31,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 20:14:31,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 20:14:31,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 20:14:31,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 20:14:31,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 20:14:31,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 20:14:31,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 20:14:31,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 20:14:31,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 20:14:31,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 20:14:31,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:14:31,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 20:14:31,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 20:14:31,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 20:14:31,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 20:14:31,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 20:14:31,693 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 20:14:31,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 20:14:31,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 20:14:31,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 20:14:32,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 20:14:32,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 20:14:32,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 20:14:32,012 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 20:14:32,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-06-05 20:14:32,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ec569fd/4ae51ba42c7a4ebf903eea2401d2ca6b/FLAGd70839098 [2021-06-05 20:14:32,844 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 20:14:32,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-06-05 20:14:32,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ec569fd/4ae51ba42c7a4ebf903eea2401d2ca6b/FLAGd70839098 [2021-06-05 20:14:33,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ec569fd/4ae51ba42c7a4ebf903eea2401d2ca6b [2021-06-05 20:14:33,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 20:14:33,100 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 20:14:33,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 20:14:33,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 20:14:33,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 20:14:33,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:33,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a4cf33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33, skipping insertion in model container [2021-06-05 20:14:33,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:33,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 20:14:33,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 20:14:33,390 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2021-06-05 20:14:33,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 20:14:33,671 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 20:14:33,685 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2021-06-05 20:14:33,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 20:14:33,914 INFO L208 MainTranslator]: Completed translation [2021-06-05 20:14:33,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33 WrapperNode [2021-06-05 20:14:33,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 20:14:33,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 20:14:33,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 20:14:33,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 20:14:33,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:33,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:33,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 20:14:33,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 20:14:33,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 20:14:33,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 20:14:34,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... [2021-06-05 20:14:34,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 20:14:34,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 20:14:34,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 20:14:34,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 20:14:34,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:14:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 20:14:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 20:14:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 20:14:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 20:14:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 20:14:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-06-05 20:14:34,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-06-05 20:14:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 20:14:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 20:14:34,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 20:14:34,161 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 20:14:34,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 20:14:34,553 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-06-05 20:14:34,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:14:34 BoogieIcfgContainer [2021-06-05 20:14:34,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 20:14:34,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 20:14:34,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 20:14:34,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 20:14:34,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 08:14:33" (1/3) ... [2021-06-05 20:14:34,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16683d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:14:34, skipping insertion in model container [2021-06-05 20:14:34,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 08:14:33" (2/3) ... [2021-06-05 20:14:34,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16683d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:14:34, skipping insertion in model container [2021-06-05 20:14:34,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:14:34" (3/3) ... [2021-06-05 20:14:34,561 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-06-05 20:14:34,566 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 20:14:34,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 20:14:34,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 20:14:34,568 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 20:14:34,590 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,590 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,590 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,590 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,591 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,592 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,592 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,592 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,592 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,592 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,593 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,593 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,593 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,593 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,593 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,593 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,594 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,594 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,594 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,594 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,594 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,595 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,595 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,595 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,595 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,595 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,595 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,596 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,596 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,596 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,596 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,596 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,596 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,597 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,597 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,597 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,597 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,597 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,597 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,598 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,599 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,600 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,600 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,600 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,600 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,600 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,600 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,601 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,601 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:14:34,607 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-05 20:14:34,625 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 20:14:34,641 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:14:34,642 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:14:34,642 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:14:34,642 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:14:34,642 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:14:34,642 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:14:34,642 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:14:34,642 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 20:14:34,651 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 90 transitions, 188 flow [2021-06-05 20:14:34,672 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.028328611898017) internal successors, (716), 354 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.028328611898017) internal successors, (716), 354 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 20:14:34,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:34,693 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:34,704 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1593361763, now seen corresponding path program 1 times [2021-06-05 20:14:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:34,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913767435] [2021-06-05 20:14:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:14:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913767435] [2021-06-05 20:14:34,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913767435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:14:34,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:14:34,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 20:14:34,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442771091] [2021-06-05 20:14:34,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-05 20:14:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-05 20:14:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-05 20:14:34,934 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.028328611898017) internal successors, (716), 354 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:34,956 INFO L93 Difference]: Finished difference Result 347 states and 653 transitions. [2021-06-05 20:14:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-05 20:14:34,957 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 20:14:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:34,967 INFO L225 Difference]: With dead ends: 347 [2021-06-05 20:14:34,967 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 20:14:34,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-05 20:14:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 20:14:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-06-05 20:14:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.8694158075601375) internal successors, (544), 291 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 544 transitions. [2021-06-05 20:14:35,036 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 544 transitions. Word has length 53 [2021-06-05 20:14:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:35,036 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 544 transitions. [2021-06-05 20:14:35,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 544 transitions. [2021-06-05 20:14:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 20:14:35,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:35,039 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:35,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 20:14:35,040 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash -436565571, now seen corresponding path program 1 times [2021-06-05 20:14:35,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:35,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316623946] [2021-06-05 20:14:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:14:35,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:35,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316623946] [2021-06-05 20:14:35,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316623946] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:14:35,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:14:35,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:14:35,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13515713] [2021-06-05 20:14:35,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:14:35,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:14:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:14:35,202 INFO L87 Difference]: Start difference. First operand 292 states and 544 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:35,305 INFO L93 Difference]: Finished difference Result 432 states and 824 transitions. [2021-06-05 20:14:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:14:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 20:14:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:35,309 INFO L225 Difference]: With dead ends: 432 [2021-06-05 20:14:35,309 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 20:14:35,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:14:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 20:14:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 306. [2021-06-05 20:14:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.8754098360655738) internal successors, (572), 305 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 572 transitions. [2021-06-05 20:14:35,346 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 572 transitions. Word has length 53 [2021-06-05 20:14:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:35,347 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 572 transitions. [2021-06-05 20:14:35,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 572 transitions. [2021-06-05 20:14:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 20:14:35,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:35,355 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:35,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 20:14:35,355 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1233051585, now seen corresponding path program 1 times [2021-06-05 20:14:35,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:35,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191081489] [2021-06-05 20:14:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:14:35,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191081489] [2021-06-05 20:14:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191081489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084986968] [2021-06-05 20:14:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-06-05 20:14:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:14:35,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084986968] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:14:35,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 20:14:35,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-06-05 20:14:35,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599634524] [2021-06-05 20:14:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:14:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:14:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:14:35,808 INFO L87 Difference]: Start difference. First operand 306 states and 572 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:35,836 INFO L93 Difference]: Finished difference Result 439 states and 838 transitions. [2021-06-05 20:14:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:14:35,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 20:14:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:35,839 INFO L225 Difference]: With dead ends: 439 [2021-06-05 20:14:35,839 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 20:14:35,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:14:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 20:14:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 325. [2021-06-05 20:14:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.882716049382716) internal successors, (610), 324 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 610 transitions. [2021-06-05 20:14:35,853 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 610 transitions. Word has length 64 [2021-06-05 20:14:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:35,853 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 610 transitions. [2021-06-05 20:14:35,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 610 transitions. [2021-06-05 20:14:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 20:14:35,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:35,855 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:36,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 20:14:36,077 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash -260316758, now seen corresponding path program 1 times [2021-06-05 20:14:36,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:36,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782445783] [2021-06-05 20:14:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:14:36,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:36,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782445783] [2021-06-05 20:14:36,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782445783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:36,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062685717] [2021-06-05 20:14:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 20:14:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 20:14:36,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062685717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:36,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:36,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 20:14:36,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482486520] [2021-06-05 20:14:36,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:14:36,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:14:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:14:36,565 INFO L87 Difference]: Start difference. First operand 325 states and 610 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:36,642 INFO L93 Difference]: Finished difference Result 625 states and 1210 transitions. [2021-06-05 20:14:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:14:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-05 20:14:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:36,645 INFO L225 Difference]: With dead ends: 625 [2021-06-05 20:14:36,646 INFO L226 Difference]: Without dead ends: 625 [2021-06-05 20:14:36,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:14:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-05 20:14:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 490. [2021-06-05 20:14:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.9222903885480573) internal successors, (940), 489 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 940 transitions. [2021-06-05 20:14:36,677 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 940 transitions. Word has length 72 [2021-06-05 20:14:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:36,677 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 940 transitions. [2021-06-05 20:14:36,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 940 transitions. [2021-06-05 20:14:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-05 20:14:36,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:36,679 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:36,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:36,880 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash -905943064, now seen corresponding path program 2 times [2021-06-05 20:14:36,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:36,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927227270] [2021-06-05 20:14:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 20:14:36,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:36,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927227270] [2021-06-05 20:14:36,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927227270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:36,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262632655] [2021-06-05 20:14:36,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:37,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:14:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 20:14:37,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 20:14:37,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262632655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:37,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:37,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 20:14:37,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056626648] [2021-06-05 20:14:37,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 20:14:37,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:37,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 20:14:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 20:14:37,244 INFO L87 Difference]: Start difference. First operand 490 states and 940 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:37,287 INFO L93 Difference]: Finished difference Result 910 states and 1780 transitions. [2021-06-05 20:14:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 20:14:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-06-05 20:14:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:37,291 INFO L225 Difference]: With dead ends: 910 [2021-06-05 20:14:37,291 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 20:14:37,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 20:14:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 20:14:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 730. [2021-06-05 20:14:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.9478737997256517) internal successors, (1420), 729 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1420 transitions. [2021-06-05 20:14:37,311 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1420 transitions. Word has length 83 [2021-06-05 20:14:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:37,313 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 1420 transitions. [2021-06-05 20:14:37,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1420 transitions. [2021-06-05 20:14:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-05 20:14:37,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:37,316 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:37,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:37,541 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:37,542 INFO L82 PathProgramCache]: Analyzing trace with hash -252612525, now seen corresponding path program 3 times [2021-06-05 20:14:37,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:37,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182510054] [2021-06-05 20:14:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 20:14:37,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:37,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182510054] [2021-06-05 20:14:37,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182510054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:37,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063178684] [2021-06-05 20:14:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:37,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 20:14:37,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:37,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 20:14:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 20:14:38,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063178684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:38,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:38,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 20:14:38,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889235347] [2021-06-05 20:14:38,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 20:14:38,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:38,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 20:14:38,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 20:14:38,016 INFO L87 Difference]: Start difference. First operand 730 states and 1420 transitions. Second operand has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:38,927 INFO L93 Difference]: Finished difference Result 1890 states and 3740 transitions. [2021-06-05 20:14:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 20:14:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-06-05 20:14:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:38,935 INFO L225 Difference]: With dead ends: 1890 [2021-06-05 20:14:38,935 INFO L226 Difference]: Without dead ends: 1890 [2021-06-05 20:14:38,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 726.4ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:14:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-05 20:14:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1311. [2021-06-05 20:14:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.9709923664122138) internal successors, (2582), 1310 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 2582 transitions. [2021-06-05 20:14:38,969 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 2582 transitions. Word has length 91 [2021-06-05 20:14:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:38,970 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 2582 transitions. [2021-06-05 20:14:38,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 12 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 2582 transitions. [2021-06-05 20:14:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 20:14:38,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:38,974 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:39,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:39,197 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1016307520, now seen corresponding path program 4 times [2021-06-05 20:14:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:39,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113324320] [2021-06-05 20:14:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 20:14:39,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:39,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113324320] [2021-06-05 20:14:39,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113324320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:39,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002703099] [2021-06-05 20:14:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:39,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:14:39,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:39,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:14:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 20:14:40,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002703099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:40,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:40,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 20:14:40,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422494011] [2021-06-05 20:14:40,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 20:14:40,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 20:14:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 20:14:40,039 INFO L87 Difference]: Start difference. First operand 1311 states and 2582 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:40,128 INFO L93 Difference]: Finished difference Result 1931 states and 3822 transitions. [2021-06-05 20:14:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 20:14:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 20:14:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:40,159 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 20:14:40,159 INFO L226 Difference]: Without dead ends: 1931 [2021-06-05 20:14:40,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:14:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-06-05 20:14:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1652. [2021-06-05 20:14:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 1.9769836462749848) internal successors, (3264), 1651 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 3264 transitions. [2021-06-05 20:14:40,195 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 3264 transitions. Word has length 110 [2021-06-05 20:14:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:40,196 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 3264 transitions. [2021-06-05 20:14:40,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 3264 transitions. [2021-06-05 20:14:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-06-05 20:14:40,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:40,200 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:40,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 20:14:40,409 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1986508674, now seen corresponding path program 5 times [2021-06-05 20:14:40,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:40,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499232954] [2021-06-05 20:14:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 20:14:40,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499232954] [2021-06-05 20:14:40,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499232954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250633378] [2021-06-05 20:14:40,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:40,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 20:14:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 20:14:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-06-05 20:14:40,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250633378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:40,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:40,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 20:14:40,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564922340] [2021-06-05 20:14:40,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 20:14:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 20:14:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 20:14:40,993 INFO L87 Difference]: Start difference. First operand 1652 states and 3264 transitions. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:42,401 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 20:14:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:44,626 INFO L93 Difference]: Finished difference Result 3280 states and 6520 transitions. [2021-06-05 20:14:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-06-05 20:14:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-06-05 20:14:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:44,638 INFO L225 Difference]: With dead ends: 3280 [2021-06-05 20:14:44,638 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 20:14:44,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11252 ImplicationChecksByTransitivity, 3189.5ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 20:14:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 20:14:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2497. [2021-06-05 20:14:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 1.984775641025641) internal successors, (4954), 2496 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 4954 transitions. [2021-06-05 20:14:44,736 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 4954 transitions. Word has length 121 [2021-06-05 20:14:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:44,736 INFO L482 AbstractCegarLoop]: Abstraction has 2497 states and 4954 transitions. [2021-06-05 20:14:44,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 4954 transitions. [2021-06-05 20:14:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 20:14:44,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:44,742 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:44,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:44,961 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1497640555, now seen corresponding path program 6 times [2021-06-05 20:14:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:44,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280555647] [2021-06-05 20:14:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280555647] [2021-06-05 20:14:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280555647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350698781] [2021-06-05 20:14:45,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:45,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 20:14:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:14:45,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:45,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350698781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:45,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:45,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 20:14:45,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119767805] [2021-06-05 20:14:45,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 20:14:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 20:14:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 20:14:45,455 INFO L87 Difference]: Start difference. First operand 2497 states and 4954 transitions. Second operand has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:45,600 INFO L93 Difference]: Finished difference Result 3277 states and 6514 transitions. [2021-06-05 20:14:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 20:14:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-05 20:14:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:45,610 INFO L225 Difference]: With dead ends: 3277 [2021-06-05 20:14:45,611 INFO L226 Difference]: Without dead ends: 3277 [2021-06-05 20:14:45,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:14:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-06-05 20:14:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 2926. [2021-06-05 20:14:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 1.987008547008547) internal successors, (5812), 2925 states have internal predecessors, (5812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 5812 transitions. [2021-06-05 20:14:45,668 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 5812 transitions. Word has length 140 [2021-06-05 20:14:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:45,668 INFO L482 AbstractCegarLoop]: Abstraction has 2926 states and 5812 transitions. [2021-06-05 20:14:45,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 5812 transitions. [2021-06-05 20:14:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-06-05 20:14:45,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:45,675 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:45,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:45,899 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:45,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:45,900 INFO L82 PathProgramCache]: Analyzing trace with hash -744065623, now seen corresponding path program 7 times [2021-06-05 20:14:45,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:45,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854552061] [2021-06-05 20:14:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:46,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854552061] [2021-06-05 20:14:46,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854552061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:46,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925944881] [2021-06-05 20:14:46,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:14:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:46,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925944881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:46,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:46,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 20:14:46,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297562903] [2021-06-05 20:14:46,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 20:14:46,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:46,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 20:14:46,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 20:14:46,454 INFO L87 Difference]: Start difference. First operand 2926 states and 5812 transitions. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:46,643 INFO L93 Difference]: Finished difference Result 3706 states and 7372 transitions. [2021-06-05 20:14:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 20:14:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-06-05 20:14:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:46,655 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 20:14:46,655 INFO L226 Difference]: Without dead ends: 3706 [2021-06-05 20:14:46,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:14:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-06-05 20:14:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3355. [2021-06-05 20:14:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 1.988670244484198) internal successors, (6670), 3354 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 6670 transitions. [2021-06-05 20:14:46,716 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 6670 transitions. Word has length 151 [2021-06-05 20:14:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:46,716 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 6670 transitions. [2021-06-05 20:14:46,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 6670 transitions. [2021-06-05 20:14:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-06-05 20:14:46,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:46,724 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:46,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 20:14:46,947 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1981293653, now seen corresponding path program 8 times [2021-06-05 20:14:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:46,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248822924] [2021-06-05 20:14:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:47,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:47,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248822924] [2021-06-05 20:14:47,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248822924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:47,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663585819] [2021-06-05 20:14:47,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:47,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:14:47,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:47,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 20:14:47,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:47,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663585819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:47,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:47,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 20:14:47,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953396430] [2021-06-05 20:14:47,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 20:14:47,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 20:14:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 20:14:47,510 INFO L87 Difference]: Start difference. First operand 3355 states and 6670 transitions. Second operand has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:47,742 INFO L93 Difference]: Finished difference Result 4135 states and 8230 transitions. [2021-06-05 20:14:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 20:14:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-06-05 20:14:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:47,783 INFO L225 Difference]: With dead ends: 4135 [2021-06-05 20:14:47,783 INFO L226 Difference]: Without dead ends: 4135 [2021-06-05 20:14:47,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 20:14:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4135 states. [2021-06-05 20:14:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4135 to 3784. [2021-06-05 20:14:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 1.9899550621200106) internal successors, (7528), 3783 states have internal predecessors, (7528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 7528 transitions. [2021-06-05 20:14:47,855 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 7528 transitions. Word has length 162 [2021-06-05 20:14:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:47,855 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 7528 transitions. [2021-06-05 20:14:47,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 7528 transitions. [2021-06-05 20:14:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-06-05 20:14:47,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:47,863 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:48,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:48,077 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash -397541271, now seen corresponding path program 9 times [2021-06-05 20:14:48,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:48,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010300295] [2021-06-05 20:14:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:14:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-06-05 20:14:48,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:14:48,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010300295] [2021-06-05 20:14:48,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010300295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:48,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39193836] [2021-06-05 20:14:48,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:48,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 20:14:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:14:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 20:14:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:14:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-06-05 20:14:48,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39193836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:14:48,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:14:48,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-06-05 20:14:48,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316009871] [2021-06-05 20:14:48,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 20:14:48,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:14:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 20:14:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 20:14:48,781 INFO L87 Difference]: Start difference. First operand 3784 states and 7528 transitions. Second operand has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 28 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:14:59,478 INFO L93 Difference]: Finished difference Result 6188 states and 12336 transitions. [2021-06-05 20:14:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2021-06-05 20:14:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 28 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-06-05 20:14:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:14:59,488 INFO L225 Difference]: With dead ends: 6188 [2021-06-05 20:14:59,489 INFO L226 Difference]: Without dead ends: 6188 [2021-06-05 20:14:59,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67099 ImplicationChecksByTransitivity, 9964.8ms TimeCoverageRelationStatistics Valid=27129, Invalid=114623, Unknown=0, NotChecked=0, Total=141752 [2021-06-05 20:14:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2021-06-05 20:14:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 5069. [2021-06-05 20:14:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5068 states have (on average 1.9925019731649567) internal successors, (10098), 5068 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 10098 transitions. [2021-06-05 20:14:59,607 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 10098 transitions. Word has length 173 [2021-06-05 20:14:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:14:59,607 INFO L482 AbstractCegarLoop]: Abstraction has 5069 states and 10098 transitions. [2021-06-05 20:14:59,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 28 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:14:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 10098 transitions. [2021-06-05 20:14:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-06-05 20:14:59,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:14:59,618 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:14:59,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:14:59,833 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:14:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:14:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1027641770, now seen corresponding path program 10 times [2021-06-05 20:14:59,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:14:59,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531682355] [2021-06-05 20:14:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:14:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-06-05 20:15:00,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:15:00,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531682355] [2021-06-05 20:15:00,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531682355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:00,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727182370] [2021-06-05 20:15:00,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:00,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:15:00,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:15:00,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 20:15:00,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:15:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-06-05 20:15:00,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727182370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:00,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:15:00,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 20:15:00,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290337712] [2021-06-05 20:15:00,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:15:00,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:15:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:15:00,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:15:00,549 INFO L87 Difference]: Start difference. First operand 5069 states and 10098 transitions. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:15:00,869 INFO L93 Difference]: Finished difference Result 6009 states and 11978 transitions. [2021-06-05 20:15:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:15:00,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-06-05 20:15:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:15:00,878 INFO L225 Difference]: With dead ends: 6009 [2021-06-05 20:15:00,879 INFO L226 Difference]: Without dead ends: 6009 [2021-06-05 20:15:00,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 20:15:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6009 states. [2021-06-05 20:15:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6009 to 5586. [2021-06-05 20:15:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5586 states, 5585 states have (on average 1.99319606087735) internal successors, (11132), 5585 states have internal predecessors, (11132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5586 states to 5586 states and 11132 transitions. [2021-06-05 20:15:00,991 INFO L78 Accepts]: Start accepts. Automaton has 5586 states and 11132 transitions. Word has length 192 [2021-06-05 20:15:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:15:00,992 INFO L482 AbstractCegarLoop]: Abstraction has 5586 states and 11132 transitions. [2021-06-05 20:15:00,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5586 states and 11132 transitions. [2021-06-05 20:15:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-06-05 20:15:01,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:15:01,004 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:15:01,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 20:15:01,229 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:15:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:15:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1416416620, now seen corresponding path program 11 times [2021-06-05 20:15:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:15:01,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536246829] [2021-06-05 20:15:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:15:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-06-05 20:15:01,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:15:01,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536246829] [2021-06-05 20:15:01,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536246829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:01,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511649971] [2021-06-05 20:15:01,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:01,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 20:15:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:15:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 20:15:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:15:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-06-05 20:15:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511649971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:01,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:15:01,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 20:15:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481092119] [2021-06-05 20:15:01,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 20:15:01,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:15:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 20:15:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:15:01,963 INFO L87 Difference]: Start difference. First operand 5586 states and 11132 transitions. Second operand has 25 states, 25 states have (on average 7.28) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:15:02,331 INFO L93 Difference]: Finished difference Result 6526 states and 13012 transitions. [2021-06-05 20:15:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:15:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.28) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-06-05 20:15:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:15:02,344 INFO L225 Difference]: With dead ends: 6526 [2021-06-05 20:15:02,344 INFO L226 Difference]: Without dead ends: 6526 [2021-06-05 20:15:02,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 20:15:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-05 20:15:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 6103. [2021-06-05 20:15:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 1.9937725335955425) internal successors, (12166), 6102 states have internal predecessors, (12166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 12166 transitions. [2021-06-05 20:15:02,449 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 12166 transitions. Word has length 203 [2021-06-05 20:15:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:15:02,449 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 12166 transitions. [2021-06-05 20:15:02,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 7.28) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 12166 transitions. [2021-06-05 20:15:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-06-05 20:15:02,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:15:02,462 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:15:02,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 20:15:02,687 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:15:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:15:02,688 INFO L82 PathProgramCache]: Analyzing trace with hash -259851370, now seen corresponding path program 12 times [2021-06-05 20:15:02,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:15:02,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682991029] [2021-06-05 20:15:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:15:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-06-05 20:15:03,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:15:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682991029] [2021-06-05 20:15:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682991029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:03,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512359956] [2021-06-05 20:15:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:03,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 20:15:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:15:03,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 20:15:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:15:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-06-05 20:15:03,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512359956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:03,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:15:03,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2021-06-05 20:15:03,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584348293] [2021-06-05 20:15:03,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 20:15:03,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:15:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 20:15:03,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 20:15:03,698 INFO L87 Difference]: Start difference. First operand 6103 states and 12166 transitions. Second operand has 36 states, 36 states have (on average 6.722222222222222) internal successors, (242), 36 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:15:30,750 INFO L93 Difference]: Finished difference Result 9129 states and 18218 transitions. [2021-06-05 20:15:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2021-06-05 20:15:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.722222222222222) internal successors, (242), 36 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-06-05 20:15:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:15:30,761 INFO L225 Difference]: With dead ends: 9129 [2021-06-05 20:15:30,761 INFO L226 Difference]: Without dead ends: 9129 [2021-06-05 20:15:30,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1390 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 610 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182985 ImplicationChecksByTransitivity, 25715.8ms TimeCoverageRelationStatistics Valid=68543, Invalid=305389, Unknown=0, NotChecked=0, Total=373932 [2021-06-05 20:15:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-06-05 20:15:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7740. [2021-06-05 20:15:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7740 states, 7739 states have (on average 1.995089804884352) internal successors, (15440), 7739 states have internal predecessors, (15440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7740 states to 7740 states and 15440 transitions. [2021-06-05 20:15:30,886 INFO L78 Accepts]: Start accepts. Automaton has 7740 states and 15440 transitions. Word has length 214 [2021-06-05 20:15:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:15:30,886 INFO L482 AbstractCegarLoop]: Abstraction has 7740 states and 15440 transitions. [2021-06-05 20:15:30,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 6.722222222222222) internal successors, (242), 36 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7740 states and 15440 transitions. [2021-06-05 20:15:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-06-05 20:15:30,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:15:30,901 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:15:31,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 20:15:31,121 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:15:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:15:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash -956712513, now seen corresponding path program 13 times [2021-06-05 20:15:31,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:15:31,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606369065] [2021-06-05 20:15:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:15:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-06-05 20:15:31,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:15:31,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606369065] [2021-06-05 20:15:31,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606369065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:31,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642941709] [2021-06-05 20:15:31,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:31,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 20:15:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:15:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-06-05 20:15:31,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642941709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:31,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:15:31,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 20:15:31,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120241839] [2021-06-05 20:15:31,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 20:15:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:15:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 20:15:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:15:31,929 INFO L87 Difference]: Start difference. First operand 7740 states and 15440 transitions. Second operand has 29 states, 29 states have (on average 7.0344827586206895) internal successors, (204), 29 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:15:32,352 INFO L93 Difference]: Finished difference Result 8840 states and 17640 transitions. [2021-06-05 20:15:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 20:15:32,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.0344827586206895) internal successors, (204), 29 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-06-05 20:15:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:15:32,365 INFO L225 Difference]: With dead ends: 8840 [2021-06-05 20:15:32,365 INFO L226 Difference]: Without dead ends: 8840 [2021-06-05 20:15:32,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:15:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8840 states. [2021-06-05 20:15:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8840 to 8345. [2021-06-05 20:15:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 8344 states have (on average 1.9954458293384467) internal successors, (16650), 8344 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 16650 transitions. [2021-06-05 20:15:32,479 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 16650 transitions. Word has length 233 [2021-06-05 20:15:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:15:32,480 INFO L482 AbstractCegarLoop]: Abstraction has 8345 states and 16650 transitions. [2021-06-05 20:15:32,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 7.0344827586206895) internal successors, (204), 29 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 16650 transitions. [2021-06-05 20:15:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-06-05 20:15:32,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:15:32,493 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:15:32,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:32,709 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:15:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:15:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -290106559, now seen corresponding path program 14 times [2021-06-05 20:15:32,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:15:32,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582684307] [2021-06-05 20:15:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:15:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-06-05 20:15:33,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:15:33,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582684307] [2021-06-05 20:15:33,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582684307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:33,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049894528] [2021-06-05 20:15:33,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:33,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:15:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:15:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 20:15:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:15:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-06-05 20:15:33,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049894528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:33,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:15:33,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 20:15:33,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095547447] [2021-06-05 20:15:33,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 20:15:33,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:15:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 20:15:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 20:15:33,542 INFO L87 Difference]: Start difference. First operand 8345 states and 16650 transitions. Second operand has 31 states, 31 states have (on average 6.935483870967742) internal successors, (215), 31 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:15:34,037 INFO L93 Difference]: Finished difference Result 9445 states and 18850 transitions. [2021-06-05 20:15:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 20:15:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.935483870967742) internal successors, (215), 31 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-06-05 20:15:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:15:34,070 INFO L225 Difference]: With dead ends: 9445 [2021-06-05 20:15:34,070 INFO L226 Difference]: Without dead ends: 9445 [2021-06-05 20:15:34,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:15:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2021-06-05 20:15:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 8950. [2021-06-05 20:15:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8950 states, 8949 states have (on average 1.9957537154989384) internal successors, (17860), 8949 states have internal predecessors, (17860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8950 states to 8950 states and 17860 transitions. [2021-06-05 20:15:34,302 INFO L78 Accepts]: Start accepts. Automaton has 8950 states and 17860 transitions. Word has length 244 [2021-06-05 20:15:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:15:34,303 INFO L482 AbstractCegarLoop]: Abstraction has 8950 states and 17860 transitions. [2021-06-05 20:15:34,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.935483870967742) internal successors, (215), 31 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:15:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8950 states and 17860 transitions. [2021-06-05 20:15:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-06-05 20:15:34,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:15:34,462 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:15:34,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 20:15:34,681 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:15:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:15:34,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1210455167, now seen corresponding path program 15 times [2021-06-05 20:15:34,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:15:34,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141720785] [2021-06-05 20:15:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:15:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:15:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 1015 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-06-05 20:15:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:15:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141720785] [2021-06-05 20:15:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141720785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187601415] [2021-06-05 20:15:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:15:35,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 20:15:35,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:15:35,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 20:15:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:15:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2021-06-05 20:15:35,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187601415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:15:35,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:15:35,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2021-06-05 20:15:35,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880999554] [2021-06-05 20:15:35,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 20:15:35,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:15:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 20:15:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 20:15:35,806 INFO L87 Difference]: Start difference. First operand 8950 states and 17860 transitions. Second operand has 44 states, 44 states have (on average 6.431818181818182) internal successors, (283), 44 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:16:27,038 INFO L93 Difference]: Finished difference Result 12598 states and 25156 transitions. [2021-06-05 20:16:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 881 states. [2021-06-05 20:16:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.431818181818182) internal successors, (283), 44 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-06-05 20:16:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:16:27,047 INFO L225 Difference]: With dead ends: 12598 [2021-06-05 20:16:27,048 INFO L226 Difference]: Without dead ends: 12598 [2021-06-05 20:16:27,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1999 GetRequests, 1100 SyntacticMatches, 0 SemanticMatches, 899 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404800 ImplicationChecksByTransitivity, 48844.3ms TimeCoverageRelationStatistics Valid=144350, Invalid=666550, Unknown=0, NotChecked=0, Total=810900 [2021-06-05 20:16:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12598 states. [2021-06-05 20:16:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12598 to 10939. [2021-06-05 20:16:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10939 states, 10938 states have (on average 1.9965258731029438) internal successors, (21838), 10938 states have internal predecessors, (21838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10939 states to 10939 states and 21838 transitions. [2021-06-05 20:16:27,231 INFO L78 Accepts]: Start accepts. Automaton has 10939 states and 21838 transitions. Word has length 255 [2021-06-05 20:16:27,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:16:27,231 INFO L482 AbstractCegarLoop]: Abstraction has 10939 states and 21838 transitions. [2021-06-05 20:16:27,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 6.431818181818182) internal successors, (283), 44 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10939 states and 21838 transitions. [2021-06-05 20:16:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-06-05 20:16:27,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:16:27,249 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:16:27,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 20:16:27,474 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:16:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:16:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash -714596372, now seen corresponding path program 16 times [2021-06-05 20:16:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:16:27,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210637018] [2021-06-05 20:16:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:16:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:16:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-06-05 20:16:28,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:16:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210637018] [2021-06-05 20:16:28,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210637018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:16:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512784628] [2021-06-05 20:16:28,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:16:28,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:16:28,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:16:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 20:16:28,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:16:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-06-05 20:16:29,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512784628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:16:29,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:16:29,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-05 20:16:29,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235787493] [2021-06-05 20:16:29,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 20:16:29,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:16:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 20:16:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:16:29,711 INFO L87 Difference]: Start difference. First operand 10939 states and 21838 transitions. Second operand has 35 states, 35 states have (on average 6.771428571428571) internal successors, (237), 35 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:16:30,424 INFO L93 Difference]: Finished difference Result 12199 states and 24358 transitions. [2021-06-05 20:16:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 20:16:30,425 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.771428571428571) internal successors, (237), 35 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-06-05 20:16:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:16:30,437 INFO L225 Difference]: With dead ends: 12199 [2021-06-05 20:16:30,438 INFO L226 Difference]: Without dead ends: 12199 [2021-06-05 20:16:30,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1115.8ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:16:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2021-06-05 20:16:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 11632. [2021-06-05 20:16:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11632 states, 11631 states have (on average 1.996732869056831) internal successors, (23224), 11631 states have internal predecessors, (23224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11632 states to 11632 states and 23224 transitions. [2021-06-05 20:16:30,598 INFO L78 Accepts]: Start accepts. Automaton has 11632 states and 23224 transitions. Word has length 274 [2021-06-05 20:16:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:16:30,598 INFO L482 AbstractCegarLoop]: Abstraction has 11632 states and 23224 transitions. [2021-06-05 20:16:30,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.771428571428571) internal successors, (237), 35 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11632 states and 23224 transitions. [2021-06-05 20:16:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-06-05 20:16:30,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:16:30,608 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:16:30,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:16:30,809 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:16:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:16:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1708023638, now seen corresponding path program 17 times [2021-06-05 20:16:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:16:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342048073] [2021-06-05 20:16:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:16:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:16:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-06-05 20:16:31,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:16:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342048073] [2021-06-05 20:16:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342048073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:16:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36620938] [2021-06-05 20:16:31,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:16:31,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 20:16:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:16:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 20:16:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:16:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-06-05 20:16:32,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36620938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:16:32,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:16:32,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 50 [2021-06-05 20:16:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479475334] [2021-06-05 20:16:32,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 20:16:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:16:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 20:16:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 20:16:32,173 INFO L87 Difference]: Start difference. First operand 11632 states and 23224 transitions. Second operand has 50 states, 50 states have (on average 6.26) internal successors, (313), 50 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:16:45,998 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 20:17:21,937 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 20:18:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:18:02,837 INFO L93 Difference]: Finished difference Result 15748 states and 31456 transitions. [2021-06-05 20:18:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1151 states. [2021-06-05 20:18:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.26) internal successors, (313), 50 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-06-05 20:18:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:18:02,850 INFO L225 Difference]: With dead ends: 15748 [2021-06-05 20:18:02,850 INFO L226 Difference]: Without dead ends: 15748 [2021-06-05 20:18:02,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2567 GetRequests, 1395 SyntacticMatches, 0 SemanticMatches, 1172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695227 ImplicationChecksByTransitivity, 86042.8ms TimeCoverageRelationStatistics Valid=240556, Invalid=1136546, Unknown=0, NotChecked=0, Total=1377102 [2021-06-05 20:18:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15748 states. [2021-06-05 20:18:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15748 to 13885. [2021-06-05 20:18:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13885 states, 13884 states have (on average 1.9972630365888793) internal successors, (27730), 13884 states have internal predecessors, (27730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:18:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13885 states to 13885 states and 27730 transitions. [2021-06-05 20:18:03,202 INFO L78 Accepts]: Start accepts. Automaton has 13885 states and 27730 transitions. Word has length 285 [2021-06-05 20:18:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:18:03,203 INFO L482 AbstractCegarLoop]: Abstraction has 13885 states and 27730 transitions. [2021-06-05 20:18:03,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 6.26) internal successors, (313), 50 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:18:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 13885 states and 27730 transitions. [2021-06-05 20:18:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-06-05 20:18:03,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:18:03,215 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:18:03,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:18:03,423 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:18:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:18:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 908747159, now seen corresponding path program 18 times [2021-06-05 20:18:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:18:03,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45114857] [2021-06-05 20:18:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:18:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:18:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-06-05 20:18:03,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:18:03,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45114857] [2021-06-05 20:18:03,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45114857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:18:03,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660978311] [2021-06-05 20:18:03,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:18:04,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 20:18:04,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:18:04,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 20:18:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:18:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2021-06-05 20:18:05,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660978311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:18:05,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:18:05,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19] total 54 [2021-06-05 20:18:05,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334784425] [2021-06-05 20:18:05,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 20:18:05,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:18:05,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 20:18:05,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2404, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 20:18:05,057 INFO L87 Difference]: Start difference. First operand 13885 states and 27730 transitions. Second operand has 54 states, 54 states have (on average 6.148148148148148) internal successors, (332), 54 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:18:10,656 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 20:19:07,461 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 20:20:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:10,816 INFO L93 Difference]: Finished difference Result 18315 states and 36590 transitions. [2021-06-05 20:20:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1379 states. [2021-06-05 20:20:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.148148148148148) internal successors, (332), 54 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-06-05 20:20:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:10,845 INFO L225 Difference]: With dead ends: 18315 [2021-06-05 20:20:10,845 INFO L226 Difference]: Without dead ends: 18315 [2021-06-05 20:20:11,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3040 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 1402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001215 ImplicationChecksByTransitivity, 120188.5ms TimeCoverageRelationStatistics Valid=339740, Invalid=1630072, Unknown=0, NotChecked=0, Total=1969812 [2021-06-05 20:20:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18315 states. [2021-06-05 20:20:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18315 to 16314. [2021-06-05 20:20:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16314 states, 16313 states have (on average 1.9976705694844603) internal successors, (32588), 16313 states have internal predecessors, (32588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16314 states to 16314 states and 32588 transitions. [2021-06-05 20:20:11,352 INFO L78 Accepts]: Start accepts. Automaton has 16314 states and 32588 transitions. Word has length 304 [2021-06-05 20:20:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:11,353 INFO L482 AbstractCegarLoop]: Abstraction has 16314 states and 32588 transitions. [2021-06-05 20:20:11,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 6.148148148148148) internal successors, (332), 54 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:11,353 INFO L276 IsEmpty]: Start isEmpty. Operand 16314 states and 32588 transitions. [2021-06-05 20:20:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-06-05 20:20:11,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:11,406 INFO L554 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:11,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:11,607 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1623503552, now seen corresponding path program 19 times [2021-06-05 20:20:11,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:11,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394551190] [2021-06-05 20:20:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-06-05 20:20:12,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394551190] [2021-06-05 20:20:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394551190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71832171] [2021-06-05 20:20:12,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 20:20:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-06-05 20:20:12,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71832171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:12,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:12,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-06-05 20:20:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066824288] [2021-06-05 20:20:12,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 20:20:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 20:20:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 20:20:12,822 INFO L87 Difference]: Start difference. First operand 16314 states and 32588 transitions. Second operand has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:14,465 INFO L93 Difference]: Finished difference Result 17894 states and 35748 transitions. [2021-06-05 20:20:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 20:20:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-06-05 20:20:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:14,481 INFO L225 Difference]: With dead ends: 17894 [2021-06-05 20:20:14,481 INFO L226 Difference]: Without dead ends: 17894 [2021-06-05 20:20:14,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1813.1ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 20:20:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17894 states. [2021-06-05 20:20:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17894 to 17183. [2021-06-05 20:20:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17183 states, 17182 states have (on average 1.9977883831917123) internal successors, (34326), 17182 states have internal predecessors, (34326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17183 states to 17183 states and 34326 transitions. [2021-06-05 20:20:14,682 INFO L78 Accepts]: Start accepts. Automaton has 17183 states and 34326 transitions. Word has length 323 [2021-06-05 20:20:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:14,683 INFO L482 AbstractCegarLoop]: Abstraction has 17183 states and 34326 transitions. [2021-06-05 20:20:14,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17183 states and 34326 transitions. [2021-06-05 20:20:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-06-05 20:20:14,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:14,705 INFO L554 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:14,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 20:20:14,915 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:14,915 INFO L82 PathProgramCache]: Analyzing trace with hash -125102014, now seen corresponding path program 20 times [2021-06-05 20:20:14,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:14,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894439076] [2021-06-05 20:20:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-06-05 20:20:15,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894439076] [2021-06-05 20:20:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894439076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402579167] [2021-06-05 20:20:15,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:20:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 20:20:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-06-05 20:20:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402579167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:16,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:16,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-06-05 20:20:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375076353] [2021-06-05 20:20:16,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 20:20:16,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 20:20:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 20:20:16,775 INFO L87 Difference]: Start difference. First operand 17183 states and 34326 transitions. Second operand has 43 states, 43 states have (on average 6.534883720930233) internal successors, (281), 43 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:18,053 INFO L93 Difference]: Finished difference Result 18052 states and 36064 transitions. [2021-06-05 20:20:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 20:20:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.534883720930233) internal successors, (281), 43 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-06-05 20:20:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:18,071 INFO L225 Difference]: With dead ends: 18052 [2021-06-05 20:20:18,072 INFO L226 Difference]: Without dead ends: 18052 [2021-06-05 20:20:18,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1472.0ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 20:20:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18052 states. [2021-06-05 20:20:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18052 to 18052. [2021-06-05 20:20:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18052 states, 18051 states have (on average 1.997894853470722) internal successors, (36064), 18051 states have internal predecessors, (36064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18052 states to 18052 states and 36064 transitions. [2021-06-05 20:20:18,271 INFO L78 Accepts]: Start accepts. Automaton has 18052 states and 36064 transitions. Word has length 334 [2021-06-05 20:20:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:18,271 INFO L482 AbstractCegarLoop]: Abstraction has 18052 states and 36064 transitions. [2021-06-05 20:20:18,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 6.534883720930233) internal successors, (281), 43 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 18052 states and 36064 transitions. [2021-06-05 20:20:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-06-05 20:20:18,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:18,287 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:18,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 20:20:18,487 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash -178145280, now seen corresponding path program 21 times [2021-06-05 20:20:18,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:18,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493624022] [2021-06-05 20:20:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:18,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493624022] [2021-06-05 20:20:18,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493624022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576414954] [2021-06-05 20:20:18,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:19,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 20:20:19,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:19,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 20:20:19,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2407 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:19,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576414954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:19,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:19,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 20:20:19,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514604846] [2021-06-05 20:20:19,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 20:20:19,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 20:20:19,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 20:20:19,591 INFO L87 Difference]: Start difference. First operand 18052 states and 36064 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:19,902 INFO L93 Difference]: Finished difference Result 21244 states and 42448 transitions. [2021-06-05 20:20:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 20:20:19,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-06-05 20:20:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:19,919 INFO L225 Difference]: With dead ends: 21244 [2021-06-05 20:20:19,920 INFO L226 Difference]: Without dead ends: 21244 [2021-06-05 20:20:19,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 20:20:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21244 states. [2021-06-05 20:20:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21244 to 19876. [2021-06-05 20:20:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19876 states, 19875 states have (on average 1.9980880503144653) internal successors, (39712), 19875 states have internal predecessors, (39712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19876 states to 19876 states and 39712 transitions. [2021-06-05 20:20:20,145 INFO L78 Accepts]: Start accepts. Automaton has 19876 states and 39712 transitions. Word has length 345 [2021-06-05 20:20:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:20,145 INFO L482 AbstractCegarLoop]: Abstraction has 19876 states and 39712 transitions. [2021-06-05 20:20:20,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 19876 states and 39712 transitions. [2021-06-05 20:20:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-06-05 20:20:20,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:20,164 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:20,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:20,364 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1953310827, now seen corresponding path program 22 times [2021-06-05 20:20:20,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:20,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303089762] [2021-06-05 20:20:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:20,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:20,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303089762] [2021-06-05 20:20:20,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303089762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:20,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006724350] [2021-06-05 20:20:20,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:20,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:20:20,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 20:20:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006724350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:21,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:21,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 20:20:21,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602857592] [2021-06-05 20:20:21,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 20:20:21,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 20:20:21,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 20:20:21,336 INFO L87 Difference]: Start difference. First operand 19876 states and 39712 transitions. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:21,681 INFO L93 Difference]: Finished difference Result 23068 states and 46096 transitions. [2021-06-05 20:20:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 20:20:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 353 [2021-06-05 20:20:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:21,701 INFO L225 Difference]: With dead ends: 23068 [2021-06-05 20:20:21,701 INFO L226 Difference]: Without dead ends: 23068 [2021-06-05 20:20:21,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 20:20:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-06-05 20:20:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 21700. [2021-06-05 20:20:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21700 states, 21699 states have (on average 1.9982487672242961) internal successors, (43360), 21699 states have internal predecessors, (43360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21700 states to 21700 states and 43360 transitions. [2021-06-05 20:20:21,952 INFO L78 Accepts]: Start accepts. Automaton has 21700 states and 43360 transitions. Word has length 353 [2021-06-05 20:20:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:21,965 INFO L482 AbstractCegarLoop]: Abstraction has 21700 states and 43360 transitions. [2021-06-05 20:20:21,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21700 states and 43360 transitions. [2021-06-05 20:20:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 20:20:21,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:21,990 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:22,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 20:20:22,193 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1583153706, now seen corresponding path program 23 times [2021-06-05 20:20:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:22,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992424296] [2021-06-05 20:20:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2561 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:22,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:22,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992424296] [2021-06-05 20:20:22,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992424296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:22,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552654929] [2021-06-05 20:20:22,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:22,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-05 20:20:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:22,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 20:20:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2561 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552654929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:23,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:23,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 20:20:23,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823791534] [2021-06-05 20:20:23,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 20:20:23,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 20:20:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 20:20:23,304 INFO L87 Difference]: Start difference. First operand 21700 states and 43360 transitions. Second operand has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 27 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:23,703 INFO L93 Difference]: Finished difference Result 24892 states and 49744 transitions. [2021-06-05 20:20:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 20:20:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 27 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-06-05 20:20:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:23,728 INFO L225 Difference]: With dead ends: 24892 [2021-06-05 20:20:23,729 INFO L226 Difference]: Without dead ends: 24892 [2021-06-05 20:20:23,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 20:20:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24892 states. [2021-06-05 20:20:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24892 to 23524. [2021-06-05 20:20:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23524 states, 23523 states have (on average 1.9983845597925434) internal successors, (47008), 23523 states have internal predecessors, (47008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23524 states to 23524 states and 47008 transitions. [2021-06-05 20:20:23,993 INFO L78 Accepts]: Start accepts. Automaton has 23524 states and 47008 transitions. Word has length 361 [2021-06-05 20:20:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:23,993 INFO L482 AbstractCegarLoop]: Abstraction has 23524 states and 47008 transitions. [2021-06-05 20:20:23,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 27 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 23524 states and 47008 transitions. [2021-06-05 20:20:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-06-05 20:20:24,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:24,018 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:24,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:24,219 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1295108031, now seen corresponding path program 24 times [2021-06-05 20:20:24,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:24,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23241949] [2021-06-05 20:20:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:24,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23241949] [2021-06-05 20:20:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23241949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:24,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335707984] [2021-06-05 20:20:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:25,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-05 20:20:25,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 20:20:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335707984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:25,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:25,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 20:20:25,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307851645] [2021-06-05 20:20:25,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 20:20:25,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:25,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 20:20:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-06-05 20:20:25,478 INFO L87 Difference]: Start difference. First operand 23524 states and 47008 transitions. Second operand has 29 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:26,051 INFO L93 Difference]: Finished difference Result 26716 states and 53392 transitions. [2021-06-05 20:20:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 20:20:26,051 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 369 [2021-06-05 20:20:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:26,082 INFO L225 Difference]: With dead ends: 26716 [2021-06-05 20:20:26,082 INFO L226 Difference]: Without dead ends: 26716 [2021-06-05 20:20:26,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 20:20:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26716 states. [2021-06-05 20:20:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26716 to 25348. [2021-06-05 20:20:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25348 states, 25347 states have (on average 1.998500808774214) internal successors, (50656), 25347 states have internal predecessors, (50656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25348 states to 25348 states and 50656 transitions. [2021-06-05 20:20:26,413 INFO L78 Accepts]: Start accepts. Automaton has 25348 states and 50656 transitions. Word has length 369 [2021-06-05 20:20:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:26,413 INFO L482 AbstractCegarLoop]: Abstraction has 25348 states and 50656 transitions. [2021-06-05 20:20:26,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 25348 states and 50656 transitions. [2021-06-05 20:20:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-06-05 20:20:26,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:26,447 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:26,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 20:20:26,661 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -491137108, now seen corresponding path program 25 times [2021-06-05 20:20:26,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:26,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225729210] [2021-06-05 20:20:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:27,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225729210] [2021-06-05 20:20:27,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225729210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127015010] [2021-06-05 20:20:27,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 20:20:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127015010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:27,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:27,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 20:20:27,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938561359] [2021-06-05 20:20:27,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 20:20:27,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:27,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 20:20:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 20:20:27,649 INFO L87 Difference]: Start difference. First operand 25348 states and 50656 transitions. Second operand has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:28,219 INFO L93 Difference]: Finished difference Result 28540 states and 57040 transitions. [2021-06-05 20:20:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 20:20:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2021-06-05 20:20:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:28,245 INFO L225 Difference]: With dead ends: 28540 [2021-06-05 20:20:28,245 INFO L226 Difference]: Without dead ends: 28540 [2021-06-05 20:20:28,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 20:20:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28540 states. [2021-06-05 20:20:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28540 to 27172. [2021-06-05 20:20:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27172 states, 27171 states have (on average 1.998601450075448) internal successors, (54304), 27171 states have internal predecessors, (54304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27172 states to 27172 states and 54304 transitions. [2021-06-05 20:20:28,589 INFO L78 Accepts]: Start accepts. Automaton has 27172 states and 54304 transitions. Word has length 377 [2021-06-05 20:20:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:28,589 INFO L482 AbstractCegarLoop]: Abstraction has 27172 states and 54304 transitions. [2021-06-05 20:20:28,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 27172 states and 54304 transitions. [2021-06-05 20:20:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 20:20:28,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:28,622 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:28,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 20:20:28,847 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:28,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1899027479, now seen corresponding path program 26 times [2021-06-05 20:20:28,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:28,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067072448] [2021-06-05 20:20:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:29,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:29,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067072448] [2021-06-05 20:20:29,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067072448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:29,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302077274] [2021-06-05 20:20:29,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:29,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:20:29,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:29,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 20:20:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302077274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:30,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:30,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-06-05 20:20:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370828941] [2021-06-05 20:20:30,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 20:20:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 20:20:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 20:20:30,180 INFO L87 Difference]: Start difference. First operand 27172 states and 54304 transitions. Second operand has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:30,851 INFO L93 Difference]: Finished difference Result 30364 states and 60688 transitions. [2021-06-05 20:20:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 20:20:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-06-05 20:20:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:30,883 INFO L225 Difference]: With dead ends: 30364 [2021-06-05 20:20:30,883 INFO L226 Difference]: Without dead ends: 30364 [2021-06-05 20:20:30,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 20:20:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2021-06-05 20:20:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 28996. [2021-06-05 20:20:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28996 states, 28995 states have (on average 1.998689429211933) internal successors, (57952), 28995 states have internal predecessors, (57952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28996 states to 28996 states and 57952 transitions. [2021-06-05 20:20:31,341 INFO L78 Accepts]: Start accepts. Automaton has 28996 states and 57952 transitions. Word has length 385 [2021-06-05 20:20:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:31,342 INFO L482 AbstractCegarLoop]: Abstraction has 28996 states and 57952 transitions. [2021-06-05 20:20:31,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28996 states and 57952 transitions. [2021-06-05 20:20:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-06-05 20:20:31,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:31,377 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:31,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 20:20:31,603 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1560394366, now seen corresponding path program 27 times [2021-06-05 20:20:31,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:31,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900400689] [2021-06-05 20:20:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:32,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900400689] [2021-06-05 20:20:32,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900400689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746327141] [2021-06-05 20:20:32,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:32,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 20:20:32,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 20:20:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:33,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746327141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:33,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:33,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-05 20:20:33,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975697130] [2021-06-05 20:20:33,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 20:20:33,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 20:20:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 20:20:33,115 INFO L87 Difference]: Start difference. First operand 28996 states and 57952 transitions. Second operand has 35 states, 35 states have (on average 5.485714285714286) internal successors, (192), 35 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:34,082 INFO L93 Difference]: Finished difference Result 32188 states and 64336 transitions. [2021-06-05 20:20:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 20:20:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.485714285714286) internal successors, (192), 35 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2021-06-05 20:20:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:34,110 INFO L225 Difference]: With dead ends: 32188 [2021-06-05 20:20:34,110 INFO L226 Difference]: Without dead ends: 32188 [2021-06-05 20:20:34,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 950.4ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 20:20:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-05 20:20:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 30820. [2021-06-05 20:20:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30820 states, 30819 states have (on average 1.9987669943865798) internal successors, (61600), 30819 states have internal predecessors, (61600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30820 states to 30820 states and 61600 transitions. [2021-06-05 20:20:34,469 INFO L78 Accepts]: Start accepts. Automaton has 30820 states and 61600 transitions. Word has length 393 [2021-06-05 20:20:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:34,469 INFO L482 AbstractCegarLoop]: Abstraction has 30820 states and 61600 transitions. [2021-06-05 20:20:34,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.485714285714286) internal successors, (192), 35 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 30820 states and 61600 transitions. [2021-06-05 20:20:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-06-05 20:20:34,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:34,506 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:34,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:34,730 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1041427475, now seen corresponding path program 28 times [2021-06-05 20:20:34,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:34,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164053783] [2021-06-05 20:20:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:35,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164053783] [2021-06-05 20:20:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164053783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477880338] [2021-06-05 20:20:35,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:35,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:20:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 20:20:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:36,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477880338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:36,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:36,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 20:20:36,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758060360] [2021-06-05 20:20:36,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 20:20:36,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 20:20:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 20:20:36,038 INFO L87 Difference]: Start difference. First operand 30820 states and 61600 transitions. Second operand has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:36,838 INFO L93 Difference]: Finished difference Result 34012 states and 67984 transitions. [2021-06-05 20:20:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 20:20:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2021-06-05 20:20:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:36,858 INFO L225 Difference]: With dead ends: 34012 [2021-06-05 20:20:36,858 INFO L226 Difference]: Without dead ends: 34012 [2021-06-05 20:20:36,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 889.8ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:20:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34012 states. [2021-06-05 20:20:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34012 to 32644. [2021-06-05 20:20:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32644 states, 32643 states have (on average 1.9988358913090096) internal successors, (65248), 32643 states have internal predecessors, (65248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32644 states to 32644 states and 65248 transitions. [2021-06-05 20:20:37,151 INFO L78 Accepts]: Start accepts. Automaton has 32644 states and 65248 transitions. Word has length 401 [2021-06-05 20:20:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:37,151 INFO L482 AbstractCegarLoop]: Abstraction has 32644 states and 65248 transitions. [2021-06-05 20:20:37,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 32644 states and 65248 transitions. [2021-06-05 20:20:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-06-05 20:20:37,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:37,179 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:37,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 20:20:37,381 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash 482887512, now seen corresponding path program 29 times [2021-06-05 20:20:37,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:37,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835332289] [2021-06-05 20:20:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:37,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:37,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835332289] [2021-06-05 20:20:37,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835332289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:37,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620918698] [2021-06-05 20:20:37,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:38,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-05 20:20:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:38,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 20:20:38,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:38,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620918698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:38,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:38,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 20:20:38,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545192357] [2021-06-05 20:20:38,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 20:20:38,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 20:20:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 20:20:38,772 INFO L87 Difference]: Start difference. First operand 32644 states and 65248 transitions. Second operand has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:39,559 INFO L93 Difference]: Finished difference Result 35836 states and 71632 transitions. [2021-06-05 20:20:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 20:20:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-06-05 20:20:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:39,592 INFO L225 Difference]: With dead ends: 35836 [2021-06-05 20:20:39,593 INFO L226 Difference]: Without dead ends: 35836 [2021-06-05 20:20:39,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1026.6ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 20:20:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35836 states. [2021-06-05 20:20:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35836 to 34468. [2021-06-05 20:20:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 1.998897496155743) internal successors, (68896), 34467 states have internal predecessors, (68896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 68896 transitions. [2021-06-05 20:20:40,036 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 68896 transitions. Word has length 409 [2021-06-05 20:20:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:40,036 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 68896 transitions. [2021-06-05 20:20:40,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 68896 transitions. [2021-06-05 20:20:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-06-05 20:20:40,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:40,068 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:40,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:40,269 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash 123396035, now seen corresponding path program 30 times [2021-06-05 20:20:40,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:40,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90995645] [2021-06-05 20:20:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:40,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90995645] [2021-06-05 20:20:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90995645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131976054] [2021-06-05 20:20:40,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:41,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-05 20:20:41,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:41,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 20:20:41,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:41,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131976054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:41,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:41,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-06-05 20:20:41,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719200700] [2021-06-05 20:20:41,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 20:20:41,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 20:20:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 20:20:41,861 INFO L87 Difference]: Start difference. First operand 34468 states and 68896 transitions. Second operand has 41 states, 41 states have (on average 5.2682926829268295) internal successors, (216), 41 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:42,846 INFO L93 Difference]: Finished difference Result 37660 states and 75280 transitions. [2021-06-05 20:20:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 20:20:42,847 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.2682926829268295) internal successors, (216), 41 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2021-06-05 20:20:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:42,868 INFO L225 Difference]: With dead ends: 37660 [2021-06-05 20:20:42,869 INFO L226 Difference]: Without dead ends: 37660 [2021-06-05 20:20:42,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1090.5ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 20:20:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37660 states. [2021-06-05 20:20:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37660 to 36292. [2021-06-05 20:20:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36292 states, 36291 states have (on average 1.998952908434598) internal successors, (72544), 36291 states have internal predecessors, (72544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36292 states to 36292 states and 72544 transitions. [2021-06-05 20:20:43,181 INFO L78 Accepts]: Start accepts. Automaton has 36292 states and 72544 transitions. Word has length 417 [2021-06-05 20:20:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:43,181 INFO L482 AbstractCegarLoop]: Abstraction has 36292 states and 72544 transitions. [2021-06-05 20:20:43,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.2682926829268295) internal successors, (216), 41 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 36292 states and 72544 transitions. [2021-06-05 20:20:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-06-05 20:20:43,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:43,212 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:43,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 20:20:43,412 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -630203090, now seen corresponding path program 31 times [2021-06-05 20:20:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47269696] [2021-06-05 20:20:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:44,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47269696] [2021-06-05 20:20:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47269696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228116335] [2021-06-05 20:20:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:44,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 20:20:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-06-05 20:20:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228116335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:44,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:44,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-06-05 20:20:44,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763016015] [2021-06-05 20:20:44,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 20:20:44,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 20:20:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 20:20:44,691 INFO L87 Difference]: Start difference. First operand 36292 states and 72544 transitions. Second operand has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:20:45,698 INFO L93 Difference]: Finished difference Result 38116 states and 76192 transitions. [2021-06-05 20:20:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 20:20:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2021-06-05 20:20:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:20:45,732 INFO L225 Difference]: With dead ends: 38116 [2021-06-05 20:20:45,733 INFO L226 Difference]: Without dead ends: 38116 [2021-06-05 20:20:45,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1182.5ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 20:20:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38116 states. [2021-06-05 20:20:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38116 to 38116. [2021-06-05 20:20:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38116 states, 38115 states have (on average 1.9990030171848354) internal successors, (76192), 38115 states have internal predecessors, (76192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38116 states to 38116 states and 76192 transitions. [2021-06-05 20:20:46,254 INFO L78 Accepts]: Start accepts. Automaton has 38116 states and 76192 transitions. Word has length 425 [2021-06-05 20:20:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:20:46,255 INFO L482 AbstractCegarLoop]: Abstraction has 38116 states and 76192 transitions. [2021-06-05 20:20:46,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:20:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 38116 states and 76192 transitions. [2021-06-05 20:20:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 20:20:46,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:20:46,298 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:20:46,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 20:20:46,522 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:20:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:20:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -204324967, now seen corresponding path program 32 times [2021-06-05 20:20:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:20:46,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885167609] [2021-06-05 20:20:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:20:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:20:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:20:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:20:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885167609] [2021-06-05 20:20:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885167609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429204343] [2021-06-05 20:20:48,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:20:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 20:20:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:20:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 20:20:48,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:20:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:20:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429204343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:20:50,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:20:50,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 68 [2021-06-05 20:20:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043510499] [2021-06-05 20:20:50,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-06-05 20:20:50,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:20:50,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-06-05 20:20:50,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 20:20:50,089 INFO L87 Difference]: Start difference. First operand 38116 states and 76192 transitions. Second operand has 68 states, 68 states have (on average 6.426470588235294) internal successors, (437), 68 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:21:46,009 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 20:22:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:22:25,624 INFO L93 Difference]: Finished difference Result 2674408 states and 5348602 transitions. [2021-06-05 20:22:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 737 states. [2021-06-05 20:22:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.426470588235294) internal successors, (437), 68 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-06-05 20:22:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:22:29,019 INFO L225 Difference]: With dead ends: 2674408 [2021-06-05 20:22:29,019 INFO L226 Difference]: Without dead ends: 2674396 [2021-06-05 20:22:29,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 449 SyntacticMatches, 2 SemanticMatches, 739 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227469 ImplicationChecksByTransitivity, 25241.1ms TimeCoverageRelationStatistics Valid=2836, Invalid=545504, Unknown=0, NotChecked=0, Total=548340 [2021-06-05 20:22:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674396 states. [2021-06-05 20:22:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674396 to 85269. [2021-06-05 20:22:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85269 states, 85268 states have (on average 2.0057700426889338) internal successors, (171028), 85268 states have internal predecessors, (171028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:22:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85269 states to 85269 states and 171028 transitions. [2021-06-05 20:22:43,363 INFO L78 Accepts]: Start accepts. Automaton has 85269 states and 171028 transitions. Word has length 433 [2021-06-05 20:22:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:22:43,364 INFO L482 AbstractCegarLoop]: Abstraction has 85269 states and 171028 transitions. [2021-06-05 20:22:43,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 6.426470588235294) internal successors, (437), 68 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:22:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 85269 states and 171028 transitions. [2021-06-05 20:22:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 20:22:43,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:22:43,809 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:22:44,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 20:22:44,029 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:22:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:22:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash -551858617, now seen corresponding path program 33 times [2021-06-05 20:22:44,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:22:44,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105633059] [2021-06-05 20:22:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:22:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:22:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2021-06-05 20:22:44,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:22:44,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105633059] [2021-06-05 20:22:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105633059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:22:44,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:22:44,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:22:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170405628] [2021-06-05 20:22:44,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:22:44,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:22:44,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:22:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:22:44,112 INFO L87 Difference]: Start difference. First operand 85269 states and 171028 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:22:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:22:44,213 INFO L93 Difference]: Finished difference Result 31656 states and 59821 transitions. [2021-06-05 20:22:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:22:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-06-05 20:22:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:22:44,256 INFO L225 Difference]: With dead ends: 31656 [2021-06-05 20:22:44,257 INFO L226 Difference]: Without dead ends: 31656 [2021-06-05 20:22:44,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:22:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31656 states. [2021-06-05 20:22:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31656 to 31654. [2021-06-05 20:22:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31654 states, 31653 states have (on average 1.8898366663507409) internal successors, (59819), 31653 states have internal predecessors, (59819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:22:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31654 states to 31654 states and 59819 transitions. [2021-06-05 20:22:44,597 INFO L78 Accepts]: Start accepts. Automaton has 31654 states and 59819 transitions. Word has length 433 [2021-06-05 20:22:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:22:44,597 INFO L482 AbstractCegarLoop]: Abstraction has 31654 states and 59819 transitions. [2021-06-05 20:22:44,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:22:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 31654 states and 59819 transitions. [2021-06-05 20:22:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 20:22:44,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:22:44,626 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:22:44,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 20:22:44,626 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:22:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:22:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1171498745, now seen corresponding path program 34 times [2021-06-05 20:22:44,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:22:44,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673058238] [2021-06-05 20:22:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:22:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:22:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:22:47,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:22:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673058238] [2021-06-05 20:22:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673058238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:22:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612850654] [2021-06-05 20:22:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:22:47,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 20:22:47,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:22:47,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 20:22:47,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:22:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:22:48,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612850654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:22:48,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:22:48,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-06-05 20:22:48,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561939700] [2021-06-05 20:22:48,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 20:22:48,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:22:48,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 20:22:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:22:48,350 INFO L87 Difference]: Start difference. First operand 31654 states and 59819 transitions. Second operand has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:23:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:23:40,792 INFO L93 Difference]: Finished difference Result 348488 states and 665497 transitions. [2021-06-05 20:23:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-06-05 20:23:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-06-05 20:23:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:23:41,140 INFO L225 Difference]: With dead ends: 348488 [2021-06-05 20:23:41,141 INFO L226 Difference]: Without dead ends: 348476 [2021-06-05 20:23:41,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 681 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189414 ImplicationChecksByTransitivity, 22276.2ms TimeCoverageRelationStatistics Valid=2602, Invalid=463204, Unknown=0, NotChecked=0, Total=465806 [2021-06-05 20:23:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348476 states. [2021-06-05 20:23:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348476 to 32461. [2021-06-05 20:23:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32461 states, 32460 states have (on average 1.8910659272951325) internal successors, (61384), 32460 states have internal predecessors, (61384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:23:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32461 states to 32461 states and 61384 transitions. [2021-06-05 20:23:42,813 INFO L78 Accepts]: Start accepts. Automaton has 32461 states and 61384 transitions. Word has length 433 [2021-06-05 20:23:42,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:23:42,813 INFO L482 AbstractCegarLoop]: Abstraction has 32461 states and 61384 transitions. [2021-06-05 20:23:42,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:23:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32461 states and 61384 transitions. [2021-06-05 20:23:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 20:23:42,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:23:42,842 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:23:43,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 20:23:43,042 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:23:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:23:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1581608837, now seen corresponding path program 35 times [2021-06-05 20:23:43,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:23:43,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564835797] [2021-06-05 20:23:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:23:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:23:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:23:45,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:23:45,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564835797] [2021-06-05 20:23:45,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564835797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:23:45,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351830711] [2021-06-05 20:23:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:23:45,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-05 20:23:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:23:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 20:23:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:23:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:23:46,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351830711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:23:46,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:23:46,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-06-05 20:23:46,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246365125] [2021-06-05 20:23:46,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 20:23:46,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:23:46,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 20:23:46,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:23:46,354 INFO L87 Difference]: Start difference. First operand 32461 states and 61384 transitions. Second operand has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:24:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:24:39,083 INFO L93 Difference]: Finished difference Result 349784 states and 668005 transitions. [2021-06-05 20:24:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 678 states. [2021-06-05 20:24:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-06-05 20:24:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:24:39,404 INFO L225 Difference]: With dead ends: 349784 [2021-06-05 20:24:39,404 INFO L226 Difference]: Without dead ends: 349772 [2021-06-05 20:24:39,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 682 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190030 ImplicationChecksByTransitivity, 22298.1ms TimeCoverageRelationStatistics Valid=2606, Invalid=464566, Unknown=0, NotChecked=0, Total=467172 [2021-06-05 20:24:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349772 states. [2021-06-05 20:24:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349772 to 32491. [2021-06-05 20:24:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32491 states, 32490 states have (on average 1.8909818405663281) internal successors, (61438), 32490 states have internal predecessors, (61438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:24:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32491 states to 32491 states and 61438 transitions. [2021-06-05 20:24:41,077 INFO L78 Accepts]: Start accepts. Automaton has 32491 states and 61438 transitions. Word has length 433 [2021-06-05 20:24:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:24:41,077 INFO L482 AbstractCegarLoop]: Abstraction has 32491 states and 61438 transitions. [2021-06-05 20:24:41,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:24:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 32491 states and 61438 transitions. [2021-06-05 20:24:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 20:24:41,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:24:41,108 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:24:41,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 20:24:41,311 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:24:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:24:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash 103912197, now seen corresponding path program 36 times [2021-06-05 20:24:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:24:41,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468005811] [2021-06-05 20:24:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:24:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:24:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:24:43,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:24:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468005811] [2021-06-05 20:24:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468005811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:24:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130354584] [2021-06-05 20:24:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:24:44,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-05 20:24:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 20:24:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 20:24:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:24:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:24:44,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130354584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:24:44,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:24:44,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-06-05 20:24:44,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275189145] [2021-06-05 20:24:44,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 20:24:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:24:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 20:24:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:24:44,895 INFO L87 Difference]: Start difference. First operand 32491 states and 61438 transitions. Second operand has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:25:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:25:37,963 INFO L93 Difference]: Finished difference Result 351093 states and 670516 transitions. [2021-06-05 20:25:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 679 states. [2021-06-05 20:25:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-06-05 20:25:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:25:38,313 INFO L225 Difference]: With dead ends: 351093 [2021-06-05 20:25:38,313 INFO L226 Difference]: Without dead ends: 351081 [2021-06-05 20:25:38,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 683 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190647 ImplicationChecksByTransitivity, 22215.0ms TimeCoverageRelationStatistics Valid=2610, Invalid=465930, Unknown=0, NotChecked=0, Total=468540 [2021-06-05 20:25:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351081 states. [2021-06-05 20:25:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351081 to 32521. [2021-06-05 20:25:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32521 states, 32520 states have (on average 1.8908979089790898) internal successors, (61492), 32520 states have internal predecessors, (61492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:25:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32521 states to 32521 states and 61492 transitions. [2021-06-05 20:25:40,034 INFO L78 Accepts]: Start accepts. Automaton has 32521 states and 61492 transitions. Word has length 433 [2021-06-05 20:25:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:25:40,034 INFO L482 AbstractCegarLoop]: Abstraction has 32521 states and 61492 transitions. [2021-06-05 20:25:40,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:25:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32521 states and 61492 transitions. [2021-06-05 20:25:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 20:25:40,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:25:40,064 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:25:40,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 20:25:40,264 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 20:25:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:25:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2139240069, now seen corresponding path program 37 times [2021-06-05 20:25:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:25:40,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443181412] [2021-06-05 20:25:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:25:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:25:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:25:42,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:25:42,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443181412] [2021-06-05 20:25:42,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443181412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:25:42,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839224817] [2021-06-05 20:25:42,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 20:25:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:25:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 20:25:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 20:25:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:25:43,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839224817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 20:25:43,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 20:25:43,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-06-05 20:25:43,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306057289] [2021-06-05 20:25:43,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 20:25:43,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:25:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 20:25:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 20:25:43,464 INFO L87 Difference]: Start difference. First operand 32521 states and 61492 transitions. Second operand has 69 states, 69 states have (on average 6.333333333333333) internal successors, (437), 69 states have internal predecessors, (437), 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) Received shutdown request... [2021-06-05 20:26:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 627 states. [2021-06-05 20:26:32,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 20:26:32,721 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 20:26:32,723 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 20:26:32,724 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 20:26:32,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:26:32 BasicIcfg [2021-06-05 20:26:32,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 20:26:32,725 INFO L168 Benchmark]: Toolchain (without parser) took 719625.24 ms. Allocated memory was 331.4 MB in the beginning and 10.9 GB in the end (delta: 10.5 GB). Free memory was 292.3 MB in the beginning and 6.1 GB in the end (delta: -5.8 GB). Peak memory consumption was 4.8 GB. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 331.4 MB. Free memory is still 312.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 813.83 ms. Allocated memory is still 331.4 MB. Free memory was 292.2 MB in the beginning and 240.3 MB in the end (delta: 51.8 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.44 ms. Allocated memory is still 331.4 MB. Free memory was 240.3 MB in the beginning and 238.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L168 Benchmark]: Boogie Preprocessor took 53.28 ms. Allocated memory is still 331.4 MB. Free memory was 238.3 MB in the beginning and 237.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L168 Benchmark]: RCFGBuilder took 513.85 ms. Allocated memory is still 331.4 MB. Free memory was 236.2 MB in the beginning and 210.6 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L168 Benchmark]: TraceAbstraction took 718168.03 ms. Allocated memory was 331.4 MB in the beginning and 10.9 GB in the end (delta: 10.5 GB). Free memory was 209.8 MB in the beginning and 6.1 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.7 GB. Max. memory is 16.0 GB. [2021-06-05 20:26:32,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 331.4 MB. Free memory is still 312.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 813.83 ms. Allocated memory is still 331.4 MB. Free memory was 292.2 MB in the beginning and 240.3 MB in the end (delta: 51.8 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 70.44 ms. Allocated memory is still 331.4 MB. Free memory was 240.3 MB in the beginning and 238.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 53.28 ms. Allocated memory is still 331.4 MB. Free memory was 238.3 MB in the beginning and 237.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 513.85 ms. Allocated memory is still 331.4 MB. Free memory was 236.2 MB in the beginning and 210.6 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 718168.03 ms. Allocated memory was 331.4 MB in the beginning and 10.9 GB in the end (delta: 10.5 GB). Free memory was 209.8 MB in the beginning and 6.1 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (32521states) and FLOYD_HOARE automaton (currently 627 states, 69 states before enhancement),while ReachableStatesComputation was computing reachable states (274368 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 718082.1ms, OverallIterations: 40, TraceHistogramMax: 20, EmptinessCheckTime: 1312.1ms, AutomataDifference: 631599.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 52622 SDtfs, 178920 SDslu, 3128623 SDs, 0 SdLazy, 520117 SolverSat, 11651 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 149766.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24485 GetRequests, 15183 SyntacticMatches, 10 SemanticMatches, 9292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347097 ImplicationChecksByTransitivity, 423628.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85269occurred in iteration=35, InterpolantAutomatonStates: 8265, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25948.2ms AutomataMinimizationTime, 39 MinimizatonAttempts, 3569059 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1414.2ms SsaConstructionTime, 6668.7ms SatisfiabilityAnalysisTime, 40510.3ms InterpolantComputationTime, 21395 NumberOfCodeBlocks, 21065 NumberOfCodeBlocksAsserted, 307 NumberOfCheckSat, 21318 ConstructedInterpolants, 0 QuantifiedInterpolants, 57441 SizeOfPredicates, 826 NumberOfNonLiveVariables, 20542 ConjunctsInSsa, 1505 ConjunctsInUnsatCore, 77 InterpolantComputations, 4 PerfectInterpolantSequences, 58433/133428 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 could not prove your program: Timeout Completed graceful shutdown