/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-dev-29289db [2021-06-05 00:53:49,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 00:53:49,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 00:53:49,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 00:53:49,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 00:53:49,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 00:53:49,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 00:53:49,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 00:53:49,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 00:53:49,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 00:53:49,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 00:53:49,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 00:53:49,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 00:53:49,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 00:53:49,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 00:53:49,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 00:53:49,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 00:53:49,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 00:53:49,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 00:53:49,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 00:53:49,218 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 00:53:49,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 00:53:49,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 00:53:49,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 00:53:49,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 00:53:49,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 00:53:49,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 00:53:49,256 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 00:53:49,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 00:53:49,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 00:53:49,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 00:53:49,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 00:53:49,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 00:53:49,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 00:53:49,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 00:53:49,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 00:53:49,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 00:53:49,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 00:53:49,260 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 00:53:49,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 00:53:49,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 00:53:49,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 00:53:49,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 00:53:49,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 00:53:49,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 00:53:49,593 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 00:53:49,594 INFO L432 ainManager$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 00:53:49,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6a22f0a/16c153c9c4e44cdcb8604ec9486edf05/FLAG1629375c7 [2021-06-05 00:53:50,165 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 00:53:50,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-06-05 00:53:50,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6a22f0a/16c153c9c4e44cdcb8604ec9486edf05/FLAG1629375c7 [2021-06-05 00:53:50,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6a22f0a/16c153c9c4e44cdcb8604ec9486edf05 [2021-06-05 00:53:50,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 00:53:50,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 00:53:50,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 00:53:50,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 00:53:50,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 00:53:50,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 12:53:50" (1/1) ... [2021-06-05 00:53:50,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5641c170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:50, skipping insertion in model container [2021-06-05 00:53:50,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 12:53:50" (1/1) ... [2021-06-05 00:53:50,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 00:53:50,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 00:53:50,836 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 00:53:51,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 00:53:51,099 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 00:53:51,108 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 00:53:51,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 00:53:51,291 INFO L208 MainTranslator]: Completed translation [2021-06-05 00:53:51,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51 WrapperNode [2021-06-05 00:53:51,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 00:53:51,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 00:53:51,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 00:53:51,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 00:53:51,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 00:53:51,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 00:53:51,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 00:53:51,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 00:53:51,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (1/1) ... [2021-06-05 00:53:51,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 00:53:51,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 00:53:51,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 00:53:51,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 00:53:51,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (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 00:53:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 00:53:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 00:53:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 00:53:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 00:53:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 00:53:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-06-05 00:53:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-06-05 00:53:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 00:53:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 00:53:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 00:53:51,490 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 00:53:51,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 00:53:51,826 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-06-05 00:53:51,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:53:51 BoogieIcfgContainer [2021-06-05 00:53:51,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 00:53:51,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 00:53:51,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 00:53:51,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 00:53:51,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 12:53:50" (1/3) ... [2021-06-05 00:53:51,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ed9477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 12:53:51, skipping insertion in model container [2021-06-05 00:53:51,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 12:53:51" (2/3) ... [2021-06-05 00:53:51,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ed9477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 12:53:51, skipping insertion in model container [2021-06-05 00:53:51,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:53:51" (3/3) ... [2021-06-05 00:53:51,847 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-06-05 00:53:51,856 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 00:53:51,856 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 00:53:51,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 00:53:51,857 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 00:53:51,880 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,881 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,882 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,883 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,884 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,885 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,886 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,888 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,888 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,889 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 00:53:51,908 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-05 00:53:51,925 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 00:53:51,940 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 00:53:51,940 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 00:53:51,940 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 00:53:51,940 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 00:53:51,940 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 00:53:51,940 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 00:53:51,941 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 00:53:51,941 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 00:53:51,949 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 90 transitions, 188 flow [2021-06-05 00:53:51,974 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 00:53:51,977 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 00:53:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 00:53:51,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:51,991 INFO L521 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 00:53:51,991 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1593361763, now seen corresponding path program 1 times [2021-06-05 00:53:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:52,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163699280] [2021-06-05 00:53:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:52,174 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 00:53:52,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:52,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163699280] [2021-06-05 00:53:52,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163699280] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 00:53:52,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 00:53:52,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 00:53:52,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737838401] [2021-06-05 00:53:52,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-05 00:53:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:52,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-05 00:53:52,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-05 00:53:52,202 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 00:53:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:52,233 INFO L93 Difference]: Finished difference Result 347 states and 653 transitions. [2021-06-05 00:53:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-05 00:53:52,235 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 00:53:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:52,252 INFO L225 Difference]: With dead ends: 347 [2021-06-05 00:53:52,253 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 00:53:52,254 INFO L777 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 00:53:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 00:53:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-06-05 00:53:52,319 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 00:53:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 544 transitions. [2021-06-05 00:53:52,324 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 544 transitions. Word has length 53 [2021-06-05 00:53:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:52,326 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 544 transitions. [2021-06-05 00:53:52,334 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 00:53:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 544 transitions. [2021-06-05 00:53:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 00:53:52,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:52,341 INFO L521 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 00:53:52,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 00:53:52,342 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:52,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:52,342 INFO L82 PathProgramCache]: Analyzing trace with hash -436565571, now seen corresponding path program 1 times [2021-06-05 00:53:52,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:52,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535601005] [2021-06-05 00:53:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:52,446 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 00:53:52,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535601005] [2021-06-05 00:53:52,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535601005] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 00:53:52,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 00:53:52,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 00:53:52,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826270309] [2021-06-05 00:53:52,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 00:53:52,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 00:53:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 00:53:52,451 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 00:53:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:52,479 INFO L93 Difference]: Finished difference Result 432 states and 824 transitions. [2021-06-05 00:53:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 00:53:52,480 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 00:53:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:52,482 INFO L225 Difference]: With dead ends: 432 [2021-06-05 00:53:52,482 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 00:53:52,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 00:53:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 00:53:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 306. [2021-06-05 00:53:52,508 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 00:53:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 572 transitions. [2021-06-05 00:53:52,509 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 572 transitions. Word has length 53 [2021-06-05 00:53:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:52,509 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 572 transitions. [2021-06-05 00:53:52,509 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 00:53:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 572 transitions. [2021-06-05 00:53:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 00:53:52,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:52,512 INFO L521 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 00:53:52,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 00:53:52,512 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:52,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1947629737, now seen corresponding path program 1 times [2021-06-05 00:53:52,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:52,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624993932] [2021-06-05 00:53:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 00:53:52,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:52,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624993932] [2021-06-05 00:53:52,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624993932] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 00:53:52,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 00:53:52,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 00:53:52,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963600413] [2021-06-05 00:53:52,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 00:53:52,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 00:53:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 00:53:52,600 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 00:53:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:52,616 INFO L93 Difference]: Finished difference Result 439 states and 838 transitions. [2021-06-05 00:53:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 00:53:52,616 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 00:53:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:52,618 INFO L225 Difference]: With dead ends: 439 [2021-06-05 00:53:52,618 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 00:53:52,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 00:53:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 00:53:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 325. [2021-06-05 00:53:52,625 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 00:53:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 610 transitions. [2021-06-05 00:53:52,626 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 610 transitions. Word has length 64 [2021-06-05 00:53:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:52,627 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 610 transitions. [2021-06-05 00:53:52,627 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 00:53:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 610 transitions. [2021-06-05 00:53:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 00:53:52,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:52,628 INFO L521 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 00:53:52,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 00:53:52,628 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash 673821708, now seen corresponding path program 1 times [2021-06-05 00:53:52,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:52,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603768593] [2021-06-05 00:53:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 00:53:52,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:52,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603768593] [2021-06-05 00:53:52,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603768593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:52,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039344339] [2021-06-05 00:53:52,692 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 00:53:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:52,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-06-05 00:53:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:53:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 00:53:52,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 00:53:52,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 00:53:52,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 00:53:52,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-06-05 00:53:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 00:53:52,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039344339] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 00:53:52,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 00:53:52,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-06-05 00:53:52,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887185313] [2021-06-05 00:53:52,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 00:53:52,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:52,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 00:53:52,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 00:53:52,999 INFO L87 Difference]: Start difference. First operand 325 states and 610 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 00:53:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:53,018 INFO L93 Difference]: Finished difference Result 307 states and 565 transitions. [2021-06-05 00:53:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 00:53:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 00:53:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:53,024 INFO L225 Difference]: With dead ends: 307 [2021-06-05 00:53:53,024 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 00:53:53,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 00:53:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 00:53:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-06-05 00:53:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.84640522875817) internal successors, (565), 306 states have internal predecessors, (565), 0 states have call successors, (0), 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 00:53:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 565 transitions. [2021-06-05 00:53:53,038 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 565 transitions. Word has length 72 [2021-06-05 00:53:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:53,039 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 565 transitions. [2021-06-05 00:53:53,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 00:53:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 565 transitions. [2021-06-05 00:53:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 00:53:53,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:53,041 INFO L521 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 00:53:53,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:53:53,266 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1055514508, now seen corresponding path program 2 times [2021-06-05 00:53:53,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:53,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673098996] [2021-06-05 00:53:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 00:53:53,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:53,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673098996] [2021-06-05 00:53:53,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673098996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:53,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033545758] [2021-06-05 00:53:53,351 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 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 00:53:53,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 00:53:53,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:53:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 00:53:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:53:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 00:53:53,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033545758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:53,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:53:53,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 00:53:53,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372092389] [2021-06-05 00:53:53,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 00:53:53,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:53,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 00:53:53,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 00:53:53,622 INFO L87 Difference]: Start difference. First operand 307 states and 565 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 00:53:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:53,964 INFO L93 Difference]: Finished difference Result 1009 states and 1897 transitions. [2021-06-05 00:53:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 00:53:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 00:53:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:53,970 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 00:53:53,970 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 00:53:53,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-06-05 00:53:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 00:53:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 658. [2021-06-05 00:53:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.887366818873668) internal successors, (1240), 657 states have internal predecessors, (1240), 0 states have call successors, (0), 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 00:53:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1240 transitions. [2021-06-05 00:53:53,991 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1240 transitions. Word has length 72 [2021-06-05 00:53:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:53,991 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 1240 transitions. [2021-06-05 00:53:53,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 00:53:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1240 transitions. [2021-06-05 00:53:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-05 00:53:53,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:53,993 INFO L521 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 00:53:54,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:53:54,209 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash 881659993, now seen corresponding path program 3 times [2021-06-05 00:53:54,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:54,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021769302] [2021-06-05 00:53:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 00:53:54,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:54,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021769302] [2021-06-05 00:53:54,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021769302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:54,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035361337] [2021-06-05 00:53:54,316 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 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 00:53:54,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 00:53:54,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:53:54,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 00:53:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:53:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 00:53:54,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035361337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:54,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:53:54,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 00:53:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521775848] [2021-06-05 00:53:54,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 00:53:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 00:53:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 00:53:54,614 INFO L87 Difference]: Start difference. First operand 658 states and 1240 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 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 00:53:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:54,672 INFO L93 Difference]: Finished difference Result 1046 states and 1980 transitions. [2021-06-05 00:53:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 00:53:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 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 00:53:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:54,676 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 00:53:54,677 INFO L226 Difference]: Without dead ends: 1046 [2021-06-05 00:53:54,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 00:53:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-06-05 00:53:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 875. [2021-06-05 00:53:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.894736842105263) internal successors, (1656), 874 states have internal predecessors, (1656), 0 states have call successors, (0), 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 00:53:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1656 transitions. [2021-06-05 00:53:54,695 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1656 transitions. Word has length 91 [2021-06-05 00:53:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:54,696 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1656 transitions. [2021-06-05 00:53:54,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 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 00:53:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1656 transitions. [2021-06-05 00:53:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-06-05 00:53:54,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:54,698 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:53:54,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:53:54,923 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash -911400325, now seen corresponding path program 4 times [2021-06-05 00:53:54,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:54,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064896898] [2021-06-05 00:53:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 00:53:55,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064896898] [2021-06-05 00:53:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064896898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659507093] [2021-06-05 00:53:55,021 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 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 00:53:55,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 00:53:55,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:53:55,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 00:53:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:53:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 00:53:55,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659507093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:55,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:53:55,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 00:53:55,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348845606] [2021-06-05 00:53:55,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 00:53:55,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 00:53:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 00:53:55,312 INFO L87 Difference]: Start difference. First operand 875 states and 1656 transitions. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 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 00:53:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:55,380 INFO L93 Difference]: Finished difference Result 1341 states and 2534 transitions. [2021-06-05 00:53:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 00:53:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 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 102 [2021-06-05 00:53:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:55,385 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 00:53:55,385 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 00:53:55,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 00:53:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 00:53:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1149. [2021-06-05 00:53:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.896341463414634) internal successors, (2177), 1148 states have internal predecessors, (2177), 0 states have call successors, (0), 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 00:53:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2177 transitions. [2021-06-05 00:53:55,409 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2177 transitions. Word has length 102 [2021-06-05 00:53:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:55,409 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 2177 transitions. [2021-06-05 00:53:55,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 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 00:53:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2177 transitions. [2021-06-05 00:53:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 00:53:55,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:55,412 INFO L521 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 00:53:55,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:53:55,625 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1460877338, now seen corresponding path program 5 times [2021-06-05 00:53:55,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:55,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915834135] [2021-06-05 00:53:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 00:53:55,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:55,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915834135] [2021-06-05 00:53:55,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915834135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:55,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842220537] [2021-06-05 00:53:55,705 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 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 00:53:55,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 00:53:55,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:53:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 00:53:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:53:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 00:53:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842220537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:53:55,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 00:53:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149782820] [2021-06-05 00:53:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 00:53:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 00:53:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 00:53:55,992 INFO L87 Difference]: Start difference. First operand 1149 states and 2177 transitions. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 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 00:53:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:56,094 INFO L93 Difference]: Finished difference Result 1615 states and 3055 transitions. [2021-06-05 00:53:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 00:53:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 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 00:53:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:56,100 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 00:53:56,101 INFO L226 Difference]: Without dead ends: 1615 [2021-06-05 00:53:56,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 00:53:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-06-05 00:53:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1423. [2021-06-05 00:53:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 1.8973277074542898) internal successors, (2698), 1422 states have internal predecessors, (2698), 0 states have call successors, (0), 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 00:53:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 2698 transitions. [2021-06-05 00:53:56,132 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 2698 transitions. Word has length 110 [2021-06-05 00:53:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:53:56,132 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 2698 transitions. [2021-06-05 00:53:56,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 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 00:53:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 2698 transitions. [2021-06-05 00:53:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-06-05 00:53:56,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:53:56,136 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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 00:53:56,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:53:56,349 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:53:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:53:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash -313404847, now seen corresponding path program 6 times [2021-06-05 00:53:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:53:56,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529242326] [2021-06-05 00:53:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:53:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:53:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 00:53:56,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:53:56,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529242326] [2021-06-05 00:53:56,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529242326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:56,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244771087] [2021-06-05 00:53:56,514 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 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 00:53:56,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 00:53:56,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:53:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 00:53:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:53:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-06-05 00:53:56,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244771087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:53:56,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:53:56,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 00:53:56,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731355182] [2021-06-05 00:53:56,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 00:53:56,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:53:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 00:53:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 00:53:56,950 INFO L87 Difference]: Start difference. First operand 1423 states and 2698 transitions. Second operand has 18 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 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 00:53:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:53:59,954 INFO L93 Difference]: Finished difference Result 2733 states and 5156 transitions. [2021-06-05 00:53:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-06-05 00:53:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 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 118 [2021-06-05 00:53:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:53:59,964 INFO L225 Difference]: With dead ends: 2733 [2021-06-05 00:53:59,965 INFO L226 Difference]: Without dead ends: 2733 [2021-06-05 00:53:59,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11215 ImplicationChecksByTransitivity, 2703.0ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 00:53:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-06-05 00:54:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2124. [2021-06-05 00:54:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.8973151201130476) internal successors, (4028), 2123 states have internal predecessors, (4028), 0 states have call successors, (0), 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 00:54:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 4028 transitions. [2021-06-05 00:54:00,021 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 4028 transitions. Word has length 118 [2021-06-05 00:54:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:00,021 INFO L482 AbstractCegarLoop]: Abstraction has 2124 states and 4028 transitions. [2021-06-05 00:54:00,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 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 00:54:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 4028 transitions. [2021-06-05 00:54:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-06-05 00:54:00,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:00,028 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 00:54:00,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:54:00,242 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:00,243 INFO L82 PathProgramCache]: Analyzing trace with hash 44909880, now seen corresponding path program 7 times [2021-06-05 00:54:00,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:00,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466456586] [2021-06-05 00:54:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-06-05 00:54:00,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:00,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466456586] [2021-06-05 00:54:00,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466456586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:00,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314049217] [2021-06-05 00:54:00,372 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 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 00:54:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 00:54:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-06-05 00:54:00,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314049217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:00,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:00,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 00:54:00,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575198219] [2021-06-05 00:54:00,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 00:54:00,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 00:54:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 00:54:00,683 INFO L87 Difference]: Start difference. First operand 2124 states and 4028 transitions. Second operand has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 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 00:54:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:00,830 INFO L93 Difference]: Finished difference Result 2708 states and 5124 transitions. [2021-06-05 00:54:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 00:54:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 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 137 [2021-06-05 00:54:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:00,840 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 00:54:00,840 INFO L226 Difference]: Without dead ends: 2708 [2021-06-05 00:54:00,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-06-05 00:54:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-06-05 00:54:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2468. [2021-06-05 00:54:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.8970409404134576) internal successors, (4680), 2467 states have internal predecessors, (4680), 0 states have call successors, (0), 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 00:54:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4680 transitions. [2021-06-05 00:54:00,921 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4680 transitions. Word has length 137 [2021-06-05 00:54:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:00,921 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 4680 transitions. [2021-06-05 00:54:00,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 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 00:54:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4680 transitions. [2021-06-05 00:54:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 00:54:00,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:00,926 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 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 00:54:01,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 00:54:01,150 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:01,151 INFO L82 PathProgramCache]: Analyzing trace with hash -120582163, now seen corresponding path program 8 times [2021-06-05 00:54:01,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:01,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125379277] [2021-06-05 00:54:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-06-05 00:54:01,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:01,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125379277] [2021-06-05 00:54:01,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125379277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:01,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28370596] [2021-06-05 00:54:01,322 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 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 00:54:01,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 00:54:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 00:54:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-06-05 00:54:01,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28370596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:01,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:01,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 00:54:01,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434147293] [2021-06-05 00:54:01,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 00:54:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 00:54:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 00:54:01,660 INFO L87 Difference]: Start difference. First operand 2468 states and 4680 transitions. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 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 00:54:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:01,848 INFO L93 Difference]: Finished difference Result 3052 states and 5776 transitions. [2021-06-05 00:54:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 00:54:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 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 145 [2021-06-05 00:54:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:01,859 INFO L225 Difference]: With dead ends: 3052 [2021-06-05 00:54:01,859 INFO L226 Difference]: Without dead ends: 3052 [2021-06-05 00:54:01,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-06-05 00:54:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-05 00:54:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2812. [2021-06-05 00:54:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 1.896833866951263) internal successors, (5332), 2811 states have internal predecessors, (5332), 0 states have call successors, (0), 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 00:54:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 5332 transitions. [2021-06-05 00:54:01,913 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 5332 transitions. Word has length 145 [2021-06-05 00:54:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:01,913 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 5332 transitions. [2021-06-05 00:54:01,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 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 00:54:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 5332 transitions. [2021-06-05 00:54:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-06-05 00:54:01,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:01,920 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 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 00:54:02,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 00:54:02,144 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2132060766, now seen corresponding path program 9 times [2021-06-05 00:54:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:02,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901549300] [2021-06-05 00:54:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 175 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-06-05 00:54:02,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901549300] [2021-06-05 00:54:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901549300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094091346] [2021-06-05 00:54:02,308 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 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 00:54:02,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 00:54:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:02,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 00:54:02,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-06-05 00:54:02,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094091346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:02,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:02,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2021-06-05 00:54:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964166783] [2021-06-05 00:54:02,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 00:54:02,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 00:54:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 00:54:02,747 INFO L87 Difference]: Start difference. First operand 2812 states and 5332 transitions. Second operand has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 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 00:54:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:11,219 INFO L93 Difference]: Finished difference Result 4612 states and 8698 transitions. [2021-06-05 00:54:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2021-06-05 00:54:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 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 153 [2021-06-05 00:54:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:11,232 INFO L225 Difference]: With dead ends: 4612 [2021-06-05 00:54:11,233 INFO L226 Difference]: Without dead ends: 4612 [2021-06-05 00:54:11,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51908 ImplicationChecksByTransitivity, 7901.6ms TimeCoverageRelationStatistics Valid=21496, Invalid=89726, Unknown=0, NotChecked=0, Total=111222 [2021-06-05 00:54:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-06-05 00:54:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 3793. [2021-06-05 00:54:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 1.895042194092827) internal successors, (7186), 3792 states have internal predecessors, (7186), 0 states have call successors, (0), 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 00:54:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 7186 transitions. [2021-06-05 00:54:11,321 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 7186 transitions. Word has length 153 [2021-06-05 00:54:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:11,321 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 7186 transitions. [2021-06-05 00:54:11,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 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 00:54:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 7186 transitions. [2021-06-05 00:54:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-06-05 00:54:11,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:11,329 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 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 00:54:11,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:54:11,545 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:11,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1107497405, now seen corresponding path program 10 times [2021-06-05 00:54:11,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:11,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477453126] [2021-06-05 00:54:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 00:54:11,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:11,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477453126] [2021-06-05 00:54:11,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477453126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:11,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606936832] [2021-06-05 00:54:11,750 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 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 00:54:11,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 00:54:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 00:54:11,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 00:54:12,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606936832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:12,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:12,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 00:54:12,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37193543] [2021-06-05 00:54:12,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 00:54:12,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:12,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 00:54:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 00:54:12,140 INFO L87 Difference]: Start difference. First operand 3793 states and 7186 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 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 00:54:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:12,405 INFO L93 Difference]: Finished difference Result 4495 states and 8500 transitions. [2021-06-05 00:54:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 00:54:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 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 172 [2021-06-05 00:54:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:12,420 INFO L225 Difference]: With dead ends: 4495 [2021-06-05 00:54:12,420 INFO L226 Difference]: Without dead ends: 4495 [2021-06-05 00:54:12,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 00:54:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-06-05 00:54:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4207. [2021-06-05 00:54:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 1.8946742748454588) internal successors, (7969), 4206 states have internal predecessors, (7969), 0 states have call successors, (0), 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 00:54:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 7969 transitions. [2021-06-05 00:54:12,533 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 7969 transitions. Word has length 172 [2021-06-05 00:54:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:12,533 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 7969 transitions. [2021-06-05 00:54:12,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 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 00:54:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 7969 transitions. [2021-06-05 00:54:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 00:54:12,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:12,543 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 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 00:54:12,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:54:12,759 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash 466543336, now seen corresponding path program 11 times [2021-06-05 00:54:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:12,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909027071] [2021-06-05 00:54:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 00:54:12,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:12,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909027071] [2021-06-05 00:54:12,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909027071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:12,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482696381] [2021-06-05 00:54:12,973 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 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 00:54:13,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 00:54:13,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 00:54:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 00:54:13,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482696381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:13,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:13,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 00:54:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742707536] [2021-06-05 00:54:13,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 00:54:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 00:54:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 00:54:13,338 INFO L87 Difference]: Start difference. First operand 4207 states and 7969 transitions. Second operand has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 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 00:54:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:13,609 INFO L93 Difference]: Finished difference Result 4909 states and 9283 transitions. [2021-06-05 00:54:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 00:54:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 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 180 [2021-06-05 00:54:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:13,618 INFO L225 Difference]: With dead ends: 4909 [2021-06-05 00:54:13,618 INFO L226 Difference]: Without dead ends: 4909 [2021-06-05 00:54:13,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 00:54:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2021-06-05 00:54:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 4621. [2021-06-05 00:54:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 1.8943722943722943) internal successors, (8752), 4620 states have internal predecessors, (8752), 0 states have call successors, (0), 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 00:54:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 8752 transitions. [2021-06-05 00:54:13,699 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 8752 transitions. Word has length 180 [2021-06-05 00:54:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:13,699 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 8752 transitions. [2021-06-05 00:54:13,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 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 00:54:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 8752 transitions. [2021-06-05 00:54:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-06-05 00:54:13,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:13,708 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 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 00:54:13,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 00:54:13,929 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1061660397, now seen corresponding path program 12 times [2021-06-05 00:54:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:13,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886079774] [2021-06-05 00:54:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 49 proven. 370 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 00:54:14,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886079774] [2021-06-05 00:54:14,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886079774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730054949] [2021-06-05 00:54:14,181 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 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 00:54:14,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 00:54:14,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 00:54:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-06-05 00:54:14,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730054949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:14,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:14,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-06-05 00:54:14,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761679223] [2021-06-05 00:54:14,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 00:54:14,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 00:54:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 00:54:14,745 INFO L87 Difference]: Start difference. First operand 4621 states and 8752 transitions. Second operand has 34 states, 34 states have (on average 6.705882352941177) internal successors, (228), 34 states have internal predecessors, (228), 0 states have call successors, (0), 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 00:54:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:34,157 INFO L93 Difference]: Finished difference Result 6911 states and 13026 transitions. [2021-06-05 00:54:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-06-05 00:54:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.705882352941177) internal successors, (228), 34 states have internal predecessors, (228), 0 states have call successors, (0), 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 188 [2021-06-05 00:54:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:34,166 INFO L225 Difference]: With dead ends: 6911 [2021-06-05 00:54:34,166 INFO L226 Difference]: Without dead ends: 6911 [2021-06-05 00:54:34,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151834 ImplicationChecksByTransitivity, 18403.7ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-06-05 00:54:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2021-06-05 00:54:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 5882. [2021-06-05 00:54:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5882 states, 5881 states have (on average 1.8925352831151165) internal successors, (11130), 5881 states have internal predecessors, (11130), 0 states have call successors, (0), 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 00:54:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 11130 transitions. [2021-06-05 00:54:34,281 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 11130 transitions. Word has length 188 [2021-06-05 00:54:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:34,281 INFO L482 AbstractCegarLoop]: Abstraction has 5882 states and 11130 transitions. [2021-06-05 00:54:34,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.705882352941177) internal successors, (228), 34 states have internal predecessors, (228), 0 states have call successors, (0), 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 00:54:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 11130 transitions. [2021-06-05 00:54:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-06-05 00:54:34,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:34,293 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 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 00:54:34,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 00:54:34,509 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1951609482, now seen corresponding path program 13 times [2021-06-05 00:54:34,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:34,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854995053] [2021-06-05 00:54:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-06-05 00:54:34,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:34,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854995053] [2021-06-05 00:54:34,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854995053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:34,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069464422] [2021-06-05 00:54:34,767 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 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 00:54:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 00:54:34,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-06-05 00:54:35,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069464422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:35,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:35,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 00:54:35,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401499556] [2021-06-05 00:54:35,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 00:54:35,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 00:54:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 00:54:35,138 INFO L87 Difference]: Start difference. First operand 5882 states and 11130 transitions. Second operand has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 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 00:54:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:35,501 INFO L93 Difference]: Finished difference Result 6702 states and 12662 transitions. [2021-06-05 00:54:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 00:54:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 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 207 [2021-06-05 00:54:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:35,510 INFO L225 Difference]: With dead ends: 6702 [2021-06-05 00:54:35,510 INFO L226 Difference]: Without dead ends: 6702 [2021-06-05 00:54:35,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 00:54:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2021-06-05 00:54:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 6366. [2021-06-05 00:54:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 1.8922230950510606) internal successors, (12044), 6365 states have internal predecessors, (12044), 0 states have call successors, (0), 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 00:54:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 12044 transitions. [2021-06-05 00:54:35,609 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 12044 transitions. Word has length 207 [2021-06-05 00:54:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:35,609 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 12044 transitions. [2021-06-05 00:54:35,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 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 00:54:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 12044 transitions. [2021-06-05 00:54:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-06-05 00:54:35,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:35,628 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 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 00:54:35,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 00:54:35,852 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -375008149, now seen corresponding path program 14 times [2021-06-05 00:54:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:35,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821972168] [2021-06-05 00:54:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-06-05 00:54:36,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:36,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821972168] [2021-06-05 00:54:36,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821972168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:36,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475958268] [2021-06-05 00:54:36,144 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 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 00:54:36,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 00:54:36,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:36,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 00:54:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-06-05 00:54:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475958268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:36,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:36,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 00:54:36,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620119072] [2021-06-05 00:54:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 00:54:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 00:54:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-06-05 00:54:36,512 INFO L87 Difference]: Start difference. First operand 6366 states and 12044 transitions. Second operand has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 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 00:54:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:54:36,992 INFO L93 Difference]: Finished difference Result 7186 states and 13576 transitions. [2021-06-05 00:54:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 00:54:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 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 215 [2021-06-05 00:54:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:54:36,998 INFO L225 Difference]: With dead ends: 7186 [2021-06-05 00:54:36,999 INFO L226 Difference]: Without dead ends: 7186 [2021-06-05 00:54:36,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 00:54:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-06-05 00:54:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6850. [2021-06-05 00:54:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6850 states, 6849 states have (on average 1.8919550299313768) internal successors, (12958), 6849 states have internal predecessors, (12958), 0 states have call successors, (0), 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 00:54:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 12958 transitions. [2021-06-05 00:54:37,106 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 12958 transitions. Word has length 215 [2021-06-05 00:54:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:54:37,106 INFO L482 AbstractCegarLoop]: Abstraction has 6850 states and 12958 transitions. [2021-06-05 00:54:37,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 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 00:54:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 12958 transitions. [2021-06-05 00:54:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-06-05 00:54:37,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:54:37,120 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 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 00:54:37,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:54:37,334 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:54:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:54:37,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1095297440, now seen corresponding path program 15 times [2021-06-05 00:54:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:54:37,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218819688] [2021-06-05 00:54:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:54:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:54:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 61 proven. 637 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-06-05 00:54:37,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:54:37,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218819688] [2021-06-05 00:54:37,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218819688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:37,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757366896] [2021-06-05 00:54:37,676 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 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 00:54:37,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 00:54:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:54:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 00:54:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:54:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-06-05 00:54:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757366896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:54:38,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:54:38,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15] total 42 [2021-06-05 00:54:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868928641] [2021-06-05 00:54:38,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 00:54:38,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:54:38,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 00:54:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 00:54:38,273 INFO L87 Difference]: Start difference. First operand 6850 states and 12958 transitions. Second operand has 42 states, 42 states have (on average 6.261904761904762) internal successors, (263), 42 states have internal predecessors, (263), 0 states have call successors, (0), 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 00:55:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:55:19,724 INFO L93 Difference]: Finished difference Result 9630 states and 18140 transitions. [2021-06-05 00:55:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 821 states. [2021-06-05 00:55:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.261904761904762) internal successors, (263), 42 states have internal predecessors, (263), 0 states have call successors, (0), 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 223 [2021-06-05 00:55:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:55:19,732 INFO L225 Difference]: With dead ends: 9630 [2021-06-05 00:55:19,732 INFO L226 Difference]: Without dead ends: 9630 [2021-06-05 00:55:19,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 838 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349585 ImplicationChecksByTransitivity, 39475.5ms TimeCoverageRelationStatistics Valid=125901, Invalid=578859, Unknown=0, NotChecked=0, Total=704760 [2021-06-05 00:55:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2021-06-05 00:55:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 8391. [2021-06-05 00:55:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 1.8903456495828368) internal successors, (15860), 8390 states have internal predecessors, (15860), 0 states have call successors, (0), 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 00:55:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 15860 transitions. [2021-06-05 00:55:19,883 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 15860 transitions. Word has length 223 [2021-06-05 00:55:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:55:19,884 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 15860 transitions. [2021-06-05 00:55:19,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 6.261904761904762) internal successors, (263), 42 states have internal predecessors, (263), 0 states have call successors, (0), 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 00:55:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 15860 transitions. [2021-06-05 00:55:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-06-05 00:55:19,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:55:19,899 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 7, 7, 7, 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 00:55:20,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 00:55:20,125 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:55:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:55:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1919014401, now seen corresponding path program 16 times [2021-06-05 00:55:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:55:20,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901042517] [2021-06-05 00:55:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:55:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:55:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-06-05 00:55:20,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:55:20,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901042517] [2021-06-05 00:55:20,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901042517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:55:20,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124438461] [2021-06-05 00:55:20,513 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 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 00:55:20,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 00:55:20,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:55:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 00:55:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:55:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-06-05 00:55:20,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124438461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:55:20,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:55:20,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-06-05 00:55:20,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091364401] [2021-06-05 00:55:20,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 00:55:20,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:55:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 00:55:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 00:55:20,963 INFO L87 Difference]: Start difference. First operand 8391 states and 15860 transitions. Second operand has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 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 00:55:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:55:21,623 INFO L93 Difference]: Finished difference Result 9329 states and 17610 transitions. [2021-06-05 00:55:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 00:55:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 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 242 [2021-06-05 00:55:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:55:21,633 INFO L225 Difference]: With dead ends: 9329 [2021-06-05 00:55:21,633 INFO L226 Difference]: Without dead ends: 9329 [2021-06-05 00:55:21,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 788.1ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 00:55:21,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-06-05 00:55:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 8945. [2021-06-05 00:55:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8945 states, 8944 states have (on average 1.8900939177101967) internal successors, (16905), 8944 states have internal predecessors, (16905), 0 states have call successors, (0), 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 00:55:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 16905 transitions. [2021-06-05 00:55:21,763 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 16905 transitions. Word has length 242 [2021-06-05 00:55:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:55:21,763 INFO L482 AbstractCegarLoop]: Abstraction has 8945 states and 16905 transitions. [2021-06-05 00:55:21,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 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 00:55:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 16905 transitions. [2021-06-05 00:55:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-06-05 00:55:21,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:55:21,779 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 7, 7, 7, 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 00:55:21,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:55:21,993 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:55:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:55:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1596434710, now seen corresponding path program 17 times [2021-06-05 00:55:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:55:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552083766] [2021-06-05 00:55:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:55:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:55:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-06-05 00:55:22,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:55:22,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552083766] [2021-06-05 00:55:22,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552083766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:55:22,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553399312] [2021-06-05 00:55:22,425 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 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 00:55:22,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 00:55:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:55:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 00:55:22,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:55:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-06-05 00:55:22,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553399312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:55:22,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:55:22,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-05 00:55:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757667299] [2021-06-05 00:55:22,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 00:55:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:55:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 00:55:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 00:55:22,843 INFO L87 Difference]: Start difference. First operand 8945 states and 16905 transitions. Second operand has 35 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 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 00:55:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:55:23,444 INFO L93 Difference]: Finished difference Result 9883 states and 18655 transitions. [2021-06-05 00:55:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 00:55:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 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 250 [2021-06-05 00:55:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:55:23,453 INFO L225 Difference]: With dead ends: 9883 [2021-06-05 00:55:23,453 INFO L226 Difference]: Without dead ends: 9883 [2021-06-05 00:55:23,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 767.6ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 00:55:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2021-06-05 00:55:23,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 9499. [2021-06-05 00:55:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 1.8898715519056644) internal successors, (17950), 9498 states have internal predecessors, (17950), 0 states have call successors, (0), 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 00:55:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 17950 transitions. [2021-06-05 00:55:23,581 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 17950 transitions. Word has length 250 [2021-06-05 00:55:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:55:23,581 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 17950 transitions. [2021-06-05 00:55:23,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.085714285714285) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 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 00:55:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 17950 transitions. [2021-06-05 00:55:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-06-05 00:55:23,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:55:23,595 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 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 00:55:23,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:55:23,809 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:55:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:55:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1208457003, now seen corresponding path program 18 times [2021-06-05 00:55:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:55:23,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176782323] [2021-06-05 00:55:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:55:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:55:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 73 proven. 976 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-06-05 00:55:24,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:55:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176782323] [2021-06-05 00:55:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176782323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:55:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028000372] [2021-06-05 00:55:24,257 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 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 00:55:24,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 00:55:24,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:55:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 00:55:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:55:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2021-06-05 00:55:25,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028000372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:55:25,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:55:25,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 50 [2021-06-05 00:55:25,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784788942] [2021-06-05 00:55:25,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 00:55:25,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:55:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 00:55:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 00:55:25,002 INFO L87 Difference]: Start difference. First operand 9499 states and 17950 transitions. Second operand has 50 states, 50 states have (on average 5.96) internal successors, (298), 50 states have internal predecessors, (298), 0 states have call successors, (0), 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 00:55:46,024 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 00:56:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:56:43,254 INFO L93 Difference]: Finished difference Result 12769 states and 24040 transitions. [2021-06-05 00:56:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1151 states. [2021-06-05 00:56:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.96) internal successors, (298), 50 states have internal predecessors, (298), 0 states have call successors, (0), 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 258 [2021-06-05 00:56:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:56:43,263 INFO L225 Difference]: With dead ends: 12769 [2021-06-05 00:56:43,263 INFO L226 Difference]: Without dead ends: 12769 [2021-06-05 00:56:43,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 1172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693207 ImplicationChecksByTransitivity, 74335.2ms TimeCoverageRelationStatistics Valid=240556, Invalid=1136546, Unknown=0, NotChecked=0, Total=1377102 [2021-06-05 00:56:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2021-06-05 00:56:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 11320. [2021-06-05 00:56:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11319 states have (on average 1.8885060517713579) internal successors, (21376), 11319 states have internal predecessors, (21376), 0 states have call successors, (0), 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 00:56:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 21376 transitions. [2021-06-05 00:56:43,422 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 21376 transitions. Word has length 258 [2021-06-05 00:56:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:56:43,423 INFO L482 AbstractCegarLoop]: Abstraction has 11320 states and 21376 transitions. [2021-06-05 00:56:43,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 5.96) internal successors, (298), 50 states have internal predecessors, (298), 0 states have call successors, (0), 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 00:56:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 21376 transitions. [2021-06-05 00:56:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-06-05 00:56:43,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:56:43,437 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 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 00:56:43,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 00:56:43,653 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:56:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:56:43,653 INFO L82 PathProgramCache]: Analyzing trace with hash 99810484, now seen corresponding path program 19 times [2021-06-05 00:56:43,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:56:43,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876491440] [2021-06-05 00:56:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:56:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:56:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-06-05 00:56:44,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:56:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876491440] [2021-06-05 00:56:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876491440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:56:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991695403] [2021-06-05 00:56:44,104 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 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 00:56:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:56:44,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 00:56:44,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:56:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-06-05 00:56:44,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991695403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:56:44,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:56:44,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 00:56:44,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614482360] [2021-06-05 00:56:44,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 00:56:44,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:56:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 00:56:44,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 00:56:44,591 INFO L87 Difference]: Start difference. First operand 11320 states and 21376 transitions. Second operand has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 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 00:56:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:56:45,311 INFO L93 Difference]: Finished difference Result 12376 states and 23344 transitions. [2021-06-05 00:56:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 00:56:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 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 277 [2021-06-05 00:56:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:56:45,321 INFO L225 Difference]: With dead ends: 12376 [2021-06-05 00:56:45,321 INFO L226 Difference]: Without dead ends: 12376 [2021-06-05 00:56:45,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 00:56:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2021-06-05 00:56:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 11944. [2021-06-05 00:56:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11944 states, 11943 states have (on average 1.8883027714979486) internal successors, (22552), 11943 states have internal predecessors, (22552), 0 states have call successors, (0), 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 00:56:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11944 states to 11944 states and 22552 transitions. [2021-06-05 00:56:45,446 INFO L78 Accepts]: Start accepts. Automaton has 11944 states and 22552 transitions. Word has length 277 [2021-06-05 00:56:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:56:45,446 INFO L482 AbstractCegarLoop]: Abstraction has 11944 states and 22552 transitions. [2021-06-05 00:56:45,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.871794871794871) internal successors, (229), 39 states have internal predecessors, (229), 0 states have call successors, (0), 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 00:56:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 11944 states and 22552 transitions. [2021-06-05 00:56:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-06-05 00:56:45,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:56:45,457 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 8, 8, 8, 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 00:56:45,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:56:45,658 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:56:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:56:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1815220201, now seen corresponding path program 20 times [2021-06-05 00:56:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:56:45,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182091973] [2021-06-05 00:56:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:56:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:56:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-06-05 00:56:46,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:56:46,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182091973] [2021-06-05 00:56:46,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182091973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:56:46,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561316076] [2021-06-05 00:56:46,151 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 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 00:56:46,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 00:56:46,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:56:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 00:56:46,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:56:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-06-05 00:56:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561316076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:56:46,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:56:46,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-06-05 00:56:46,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44232312] [2021-06-05 00:56:46,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 00:56:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:56:46,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 00:56:46,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 00:56:46,610 INFO L87 Difference]: Start difference. First operand 11944 states and 22552 transitions. Second operand has 41 states, 41 states have (on average 5.780487804878049) internal successors, (237), 41 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 00:56:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:56:47,617 INFO L93 Difference]: Finished difference Result 13000 states and 24520 transitions. [2021-06-05 00:56:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 00:56:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.780487804878049) internal successors, (237), 41 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 285 [2021-06-05 00:56:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:56:47,627 INFO L225 Difference]: With dead ends: 13000 [2021-06-05 00:56:47,627 INFO L226 Difference]: Without dead ends: 13000 [2021-06-05 00:56:47,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 00:56:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13000 states. [2021-06-05 00:56:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13000 to 12568. [2021-06-05 00:56:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 12567 states have (on average 1.888119678523116) internal successors, (23728), 12567 states have internal predecessors, (23728), 0 states have call successors, (0), 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 00:56:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 23728 transitions. [2021-06-05 00:56:47,770 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 23728 transitions. Word has length 285 [2021-06-05 00:56:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:56:47,771 INFO L482 AbstractCegarLoop]: Abstraction has 12568 states and 23728 transitions. [2021-06-05 00:56:47,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.780487804878049) internal successors, (237), 41 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 00:56:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 23728 transitions. [2021-06-05 00:56:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 00:56:47,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:56:47,786 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 8, 8, 8, 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 00:56:47,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 00:56:47,994 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:56:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:56:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash -371646946, now seen corresponding path program 21 times [2021-06-05 00:56:47,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:56:47,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431094667] [2021-06-05 00:56:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:56:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:56:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 85 proven. 1387 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-06-05 00:56:48,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:56:48,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431094667] [2021-06-05 00:56:48,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431094667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:56:48,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147890751] [2021-06-05 00:56:48,601 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 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 00:56:48,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 00:56:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:56:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 00:56:48,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:56:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2021-06-05 00:56:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147890751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:56:49,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:56:49,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 19] total 58 [2021-06-05 00:56:49,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592437759] [2021-06-05 00:56:49,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 00:56:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:56:49,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 00:56:49,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 00:56:49,456 INFO L87 Difference]: Start difference. First operand 12568 states and 23728 transitions. Second operand has 58 states, 58 states have (on average 5.741379310344827) internal successors, (333), 58 states have internal predecessors, (333), 0 states have call successors, (0), 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 00:57:19,436 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 00:58:42,384 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 00:58:51,830 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 00:59:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:10,095 INFO L93 Difference]: Finished difference Result 15812 states and 29784 transitions. [2021-06-05 00:59:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1535 states. [2021-06-05 00:59:10,095 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.741379310344827) internal successors, (333), 58 states have internal predecessors, (333), 0 states have call successors, (0), 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 293 [2021-06-05 00:59:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:10,107 INFO L225 Difference]: With dead ends: 15812 [2021-06-05 00:59:10,107 INFO L226 Difference]: Without dead ends: 15812 [2021-06-05 00:59:10,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2413 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 1560 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240164 ImplicationChecksByTransitivity, 133110.1ms TimeCoverageRelationStatistics Valid=418764, Invalid=2019518, Unknown=0, NotChecked=0, Total=2438282 [2021-06-05 00:59:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15812 states. [2021-06-05 00:59:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15812 to 14669. [2021-06-05 00:59:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14669 states, 14668 states have (on average 1.8869648213798746) internal successors, (27678), 14668 states have internal predecessors, (27678), 0 states have call successors, (0), 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 00:59:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14669 states to 14669 states and 27678 transitions. [2021-06-05 00:59:10,478 INFO L78 Accepts]: Start accepts. Automaton has 14669 states and 27678 transitions. Word has length 293 [2021-06-05 00:59:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:10,479 INFO L482 AbstractCegarLoop]: Abstraction has 14669 states and 27678 transitions. [2021-06-05 00:59:10,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 5.741379310344827) internal successors, (333), 58 states have internal predecessors, (333), 0 states have call successors, (0), 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 00:59:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 14669 states and 27678 transitions. [2021-06-05 00:59:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-06-05 00:59:10,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:10,497 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 9, 9, 9, 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 00:59:10,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 00:59:10,713 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 120507201, now seen corresponding path program 22 times [2021-06-05 00:59:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:10,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693144879] [2021-06-05 00:59:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:10,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693144879] [2021-06-05 00:59:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693144879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983571274] [2021-06-05 00:59:10,946 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 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 00:59:11,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 00:59:11,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 00:59:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:11,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983571274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:11,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:11,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 00:59:11,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024977134] [2021-06-05 00:59:11,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 00:59:11,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 00:59:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 00:59:11,590 INFO L87 Difference]: Start difference. First operand 14669 states and 27678 transitions. Second operand has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 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 00:59:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:11,847 INFO L93 Difference]: Finished difference Result 17289 states and 32558 transitions. [2021-06-05 00:59:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 00:59:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 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 312 [2021-06-05 00:59:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:11,860 INFO L225 Difference]: With dead ends: 17289 [2021-06-05 00:59:11,861 INFO L226 Difference]: Without dead ends: 17289 [2021-06-05 00:59:11,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 00:59:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-06-05 00:59:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 16146. [2021-06-05 00:59:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16146 states, 16145 states have (on average 1.8861567048621863) internal successors, (30452), 16145 states have internal predecessors, (30452), 0 states have call successors, (0), 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 00:59:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 30452 transitions. [2021-06-05 00:59:12,005 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 30452 transitions. Word has length 312 [2021-06-05 00:59:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:12,005 INFO L482 AbstractCegarLoop]: Abstraction has 16146 states and 30452 transitions. [2021-06-05 00:59:12,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 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 00:59:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 30452 transitions. [2021-06-05 00:59:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-06-05 00:59:12,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:12,023 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 10, 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 00:59:12,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:59:12,245 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1013905773, now seen corresponding path program 23 times [2021-06-05 00:59:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:12,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354341402] [2021-06-05 00:59:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:12,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354341402] [2021-06-05 00:59:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354341402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493387160] [2021-06-05 00:59:12,510 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 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 00:59:12,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-05 00:59:12,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:12,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 00:59:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493387160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:13,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:13,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 00:59:13,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623432801] [2021-06-05 00:59:13,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 00:59:13,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 00:59:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 00:59:13,123 INFO L87 Difference]: Start difference. First operand 16146 states and 30452 transitions. Second operand has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 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 00:59:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:13,434 INFO L93 Difference]: Finished difference Result 18766 states and 35332 transitions. [2021-06-05 00:59:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 00:59:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 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 00:59:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:13,449 INFO L225 Difference]: With dead ends: 18766 [2021-06-05 00:59:13,449 INFO L226 Difference]: Without dead ends: 18766 [2021-06-05 00:59:13,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 00:59:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18766 states. [2021-06-05 00:59:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18766 to 17623. [2021-06-05 00:59:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17623 states, 17622 states have (on average 1.88548405402338) internal successors, (33226), 17622 states have internal predecessors, (33226), 0 states have call successors, (0), 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 00:59:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17623 states to 17623 states and 33226 transitions. [2021-06-05 00:59:13,765 INFO L78 Accepts]: Start accepts. Automaton has 17623 states and 33226 transitions. Word has length 323 [2021-06-05 00:59:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:13,765 INFO L482 AbstractCegarLoop]: Abstraction has 17623 states and 33226 transitions. [2021-06-05 00:59:13,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 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 00:59:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 17623 states and 33226 transitions. [2021-06-05 00:59:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-06-05 00:59:13,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:13,781 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 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 00:59:13,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 00:59:13,982 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1039328257, now seen corresponding path program 24 times [2021-06-05 00:59:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:13,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89010639] [2021-06-05 00:59:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:14,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:14,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89010639] [2021-06-05 00:59:14,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89010639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:14,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34136870] [2021-06-05 00:59:14,286 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 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 00:59:14,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-06-05 00:59:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 00:59:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34136870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 00:59:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924386045] [2021-06-05 00:59:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 00:59:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 00:59:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 00:59:15,144 INFO L87 Difference]: Start difference. First operand 17623 states and 33226 transitions. Second operand has 27 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 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 00:59:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:15,504 INFO L93 Difference]: Finished difference Result 20243 states and 38106 transitions. [2021-06-05 00:59:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 00:59:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 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 00:59:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:15,519 INFO L225 Difference]: With dead ends: 20243 [2021-06-05 00:59:15,520 INFO L226 Difference]: Without dead ends: 20243 [2021-06-05 00:59:15,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 00:59:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20243 states. [2021-06-05 00:59:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20243 to 19100. [2021-06-05 00:59:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19100 states, 19099 states have (on average 1.8849154405989843) internal successors, (36000), 19099 states have internal predecessors, (36000), 0 states have call successors, (0), 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 00:59:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19100 states to 19100 states and 36000 transitions. [2021-06-05 00:59:15,695 INFO L78 Accepts]: Start accepts. Automaton has 19100 states and 36000 transitions. Word has length 334 [2021-06-05 00:59:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:15,695 INFO L482 AbstractCegarLoop]: Abstraction has 19100 states and 36000 transitions. [2021-06-05 00:59:15,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 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 00:59:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 19100 states and 36000 transitions. [2021-06-05 00:59:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-06-05 00:59:15,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:15,711 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 12, 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 00:59:15,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:59:15,920 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash -687213101, now seen corresponding path program 25 times [2021-06-05 00:59:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507382126] [2021-06-05 00:59:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:16,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:16,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507382126] [2021-06-05 00:59:16,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507382126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:16,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107865728] [2021-06-05 00:59:16,237 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 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 00:59:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 00:59:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:16,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107865728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:16,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:16,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 00:59:16,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542503530] [2021-06-05 00:59:16,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 00:59:16,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 00:59:16,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-06-05 00:59:16,757 INFO L87 Difference]: Start difference. First operand 19100 states and 36000 transitions. Second operand has 29 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 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 00:59:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:17,300 INFO L93 Difference]: Finished difference Result 21720 states and 40880 transitions. [2021-06-05 00:59:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 00:59:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 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 00:59:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:17,317 INFO L225 Difference]: With dead ends: 21720 [2021-06-05 00:59:17,317 INFO L226 Difference]: Without dead ends: 21720 [2021-06-05 00:59:17,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 00:59:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21720 states. [2021-06-05 00:59:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21720 to 20577. [2021-06-05 00:59:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20577 states, 20576 states have (on average 1.8844284603421462) internal successors, (38774), 20576 states have internal predecessors, (38774), 0 states have call successors, (0), 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 00:59:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20577 states to 20577 states and 38774 transitions. [2021-06-05 00:59:17,496 INFO L78 Accepts]: Start accepts. Automaton has 20577 states and 38774 transitions. Word has length 345 [2021-06-05 00:59:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:17,497 INFO L482 AbstractCegarLoop]: Abstraction has 20577 states and 38774 transitions. [2021-06-05 00:59:17,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 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 00:59:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 20577 states and 38774 transitions. [2021-06-05 00:59:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 00:59:17,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:17,515 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 13, 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 00:59:17,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 00:59:17,715 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1790448447, now seen corresponding path program 26 times [2021-06-05 00:59:17,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:17,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547754475] [2021-06-05 00:59:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:18,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:18,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547754475] [2021-06-05 00:59:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547754475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:18,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170347392] [2021-06-05 00:59:18,079 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 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 00:59:18,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 00:59:18,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 00:59:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:18,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170347392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:18,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:18,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 00:59:18,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053822893] [2021-06-05 00:59:18,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 00:59:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 00:59:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 00:59:18,685 INFO L87 Difference]: Start difference. First operand 20577 states and 38774 transitions. Second operand has 31 states, 31 states have (on average 7.129032258064516) internal successors, (221), 31 states have internal predecessors, (221), 0 states have call successors, (0), 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 00:59:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:19,217 INFO L93 Difference]: Finished difference Result 23197 states and 43654 transitions. [2021-06-05 00:59:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 00:59:19,217 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.129032258064516) internal successors, (221), 31 states have internal predecessors, (221), 0 states have call successors, (0), 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 356 [2021-06-05 00:59:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:19,235 INFO L225 Difference]: With dead ends: 23197 [2021-06-05 00:59:19,235 INFO L226 Difference]: Without dead ends: 23197 [2021-06-05 00:59:19,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 00:59:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23197 states. [2021-06-05 00:59:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23197 to 22054. [2021-06-05 00:59:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22054 states, 22053 states have (on average 1.8840067111050651) internal successors, (41548), 22053 states have internal predecessors, (41548), 0 states have call successors, (0), 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 00:59:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 41548 transitions. [2021-06-05 00:59:19,434 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 41548 transitions. Word has length 356 [2021-06-05 00:59:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:19,434 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 41548 transitions. [2021-06-05 00:59:19,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 7.129032258064516) internal successors, (221), 31 states have internal predecessors, (221), 0 states have call successors, (0), 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 00:59:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 41548 transitions. [2021-06-05 00:59:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-06-05 00:59:19,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:19,452 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 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 00:59:19,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 00:59:19,653 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1526461715, now seen corresponding path program 27 times [2021-06-05 00:59:19,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:19,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501226878] [2021-06-05 00:59:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:20,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501226878] [2021-06-05 00:59:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501226878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654827856] [2021-06-05 00:59:20,247 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 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 00:59:20,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 00:59:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 00:59:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:20,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654827856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:20,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:20,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-06-05 00:59:20,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316310082] [2021-06-05 00:59:20,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 00:59:20,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:20,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 00:59:20,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 00:59:20,970 INFO L87 Difference]: Start difference. First operand 22054 states and 41548 transitions. Second operand has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 states have internal predecessors, (232), 0 states have call successors, (0), 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 00:59:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:21,507 INFO L93 Difference]: Finished difference Result 24674 states and 46428 transitions. [2021-06-05 00:59:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 00:59:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 states have internal predecessors, (232), 0 states have call successors, (0), 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 367 [2021-06-05 00:59:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:21,530 INFO L225 Difference]: With dead ends: 24674 [2021-06-05 00:59:21,530 INFO L226 Difference]: Without dead ends: 24674 [2021-06-05 00:59:21,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 00:59:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24674 states. [2021-06-05 00:59:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24674 to 23531. [2021-06-05 00:59:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23531 states, 23530 states have (on average 1.8836379090522737) internal successors, (44322), 23530 states have internal predecessors, (44322), 0 states have call successors, (0), 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 00:59:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23531 states to 23531 states and 44322 transitions. [2021-06-05 00:59:21,883 INFO L78 Accepts]: Start accepts. Automaton has 23531 states and 44322 transitions. Word has length 367 [2021-06-05 00:59:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:21,883 INFO L482 AbstractCegarLoop]: Abstraction has 23531 states and 44322 transitions. [2021-06-05 00:59:21,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 states have internal predecessors, (232), 0 states have call successors, (0), 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 00:59:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23531 states and 44322 transitions. [2021-06-05 00:59:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-06-05 00:59:21,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:21,902 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 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 00:59:22,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:59:22,103 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:22,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1059461759, now seen corresponding path program 28 times [2021-06-05 00:59:22,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:22,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379690536] [2021-06-05 00:59:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:22,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:22,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379690536] [2021-06-05 00:59:22,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379690536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:22,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849366337] [2021-06-05 00:59:22,561 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 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 00:59:22,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 00:59:22,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 00:59:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:23,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849366337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:23,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:23,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-05 00:59:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423541139] [2021-06-05 00:59:23,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 00:59:23,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:23,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 00:59:23,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 00:59:23,235 INFO L87 Difference]: Start difference. First operand 23531 states and 44322 transitions. Second operand has 35 states, 35 states have (on average 6.942857142857143) internal successors, (243), 35 states have internal predecessors, (243), 0 states have call successors, (0), 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 00:59:23,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:23,843 INFO L93 Difference]: Finished difference Result 26151 states and 49202 transitions. [2021-06-05 00:59:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 00:59:23,843 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.942857142857143) internal successors, (243), 35 states have internal predecessors, (243), 0 states have call successors, (0), 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 378 [2021-06-05 00:59:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:23,866 INFO L225 Difference]: With dead ends: 26151 [2021-06-05 00:59:23,866 INFO L226 Difference]: Without dead ends: 26151 [2021-06-05 00:59:23,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 00:59:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-06-05 00:59:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25008. [2021-06-05 00:59:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25008 states, 25007 states have (on average 1.8833126724517135) internal successors, (47096), 25007 states have internal predecessors, (47096), 0 states have call successors, (0), 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 00:59:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25008 states to 25008 states and 47096 transitions. [2021-06-05 00:59:24,121 INFO L78 Accepts]: Start accepts. Automaton has 25008 states and 47096 transitions. Word has length 378 [2021-06-05 00:59:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:24,121 INFO L482 AbstractCegarLoop]: Abstraction has 25008 states and 47096 transitions. [2021-06-05 00:59:24,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.942857142857143) internal successors, (243), 35 states have internal predecessors, (243), 0 states have call successors, (0), 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 00:59:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25008 states and 47096 transitions. [2021-06-05 00:59:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-06-05 00:59:24,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:24,147 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 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 00:59:24,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:59:24,349 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash -667220909, now seen corresponding path program 29 times [2021-06-05 00:59:24,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:24,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809760806] [2021-06-05 00:59:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:24,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809760806] [2021-06-05 00:59:24,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809760806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981108346] [2021-06-05 00:59:24,969 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 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 00:59:25,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-05 00:59:25,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 00:59:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:25,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981108346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:25,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:25,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 00:59:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711340581] [2021-06-05 00:59:25,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 00:59:25,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:25,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 00:59:25,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 00:59:25,703 INFO L87 Difference]: Start difference. First operand 25008 states and 47096 transitions. Second operand has 37 states, 37 states have (on average 6.864864864864865) internal successors, (254), 37 states have internal predecessors, (254), 0 states have call successors, (0), 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 00:59:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:26,370 INFO L93 Difference]: Finished difference Result 27628 states and 51976 transitions. [2021-06-05 00:59:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 00:59:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.864864864864865) internal successors, (254), 37 states have internal predecessors, (254), 0 states have call successors, (0), 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 389 [2021-06-05 00:59:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:26,401 INFO L225 Difference]: With dead ends: 27628 [2021-06-05 00:59:26,401 INFO L226 Difference]: Without dead ends: 27628 [2021-06-05 00:59:26,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 00:59:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27628 states. [2021-06-05 00:59:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27628 to 26485. [2021-06-05 00:59:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26485 states, 26484 states have (on average 1.8830237124301465) internal successors, (49870), 26484 states have internal predecessors, (49870), 0 states have call successors, (0), 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 00:59:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26485 states to 26485 states and 49870 transitions. [2021-06-05 00:59:26,657 INFO L78 Accepts]: Start accepts. Automaton has 26485 states and 49870 transitions. Word has length 389 [2021-06-05 00:59:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:26,657 INFO L482 AbstractCegarLoop]: Abstraction has 26485 states and 49870 transitions. [2021-06-05 00:59:26,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 6.864864864864865) internal successors, (254), 37 states have internal predecessors, (254), 0 states have call successors, (0), 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 00:59:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 26485 states and 49870 transitions. [2021-06-05 00:59:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-06-05 00:59:26,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:26,684 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 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 00:59:26,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 00:59:26,885 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash 726978113, now seen corresponding path program 30 times [2021-06-05 00:59:26,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:26,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871897278] [2021-06-05 00:59:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:27,130 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 00:59:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:27,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:27,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871897278] [2021-06-05 00:59:27,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871897278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:27,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295237678] [2021-06-05 00:59:27,582 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 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 00:59:28,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-05 00:59:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 00:59:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:28,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295237678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:28,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:28,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 00:59:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325210178] [2021-06-05 00:59:28,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 00:59:28,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 00:59:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 00:59:28,514 INFO L87 Difference]: Start difference. First operand 26485 states and 49870 transitions. Second operand has 39 states, 39 states have (on average 6.794871794871795) internal successors, (265), 39 states have internal predecessors, (265), 0 states have call successors, (0), 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 00:59:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:29,261 INFO L93 Difference]: Finished difference Result 29105 states and 54750 transitions. [2021-06-05 00:59:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 00:59:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.794871794871795) internal successors, (265), 39 states have internal predecessors, (265), 0 states have call successors, (0), 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 400 [2021-06-05 00:59:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:29,287 INFO L225 Difference]: With dead ends: 29105 [2021-06-05 00:59:29,287 INFO L226 Difference]: Without dead ends: 29105 [2021-06-05 00:59:29,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1098.1ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 00:59:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29105 states. [2021-06-05 00:59:29,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29105 to 27962. [2021-06-05 00:59:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27962 states, 27961 states have (on average 1.8827652802117234) internal successors, (52644), 27961 states have internal predecessors, (52644), 0 states have call successors, (0), 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 00:59:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27962 states to 27962 states and 52644 transitions. [2021-06-05 00:59:29,558 INFO L78 Accepts]: Start accepts. Automaton has 27962 states and 52644 transitions. Word has length 400 [2021-06-05 00:59:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:29,558 INFO L482 AbstractCegarLoop]: Abstraction has 27962 states and 52644 transitions. [2021-06-05 00:59:29,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 6.794871794871795) internal successors, (265), 39 states have internal predecessors, (265), 0 states have call successors, (0), 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 00:59:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27962 states and 52644 transitions. [2021-06-05 00:59:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-06-05 00:59:29,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:29,585 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 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 00:59:29,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 00:59:29,786 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:29,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1063574637, now seen corresponding path program 31 times [2021-06-05 00:59:29,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:29,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13575320] [2021-06-05 00:59:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:30,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:30,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13575320] [2021-06-05 00:59:30,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13575320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:30,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631576761] [2021-06-05 00:59:30,317 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 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 00:59:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 00:59:30,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:31,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631576761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:31,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:31,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-06-05 00:59:31,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270259659] [2021-06-05 00:59:31,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 00:59:31,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:31,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 00:59:31,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 00:59:31,063 INFO L87 Difference]: Start difference. First operand 27962 states and 52644 transitions. Second operand has 41 states, 41 states have (on average 6.7317073170731705) internal successors, (276), 41 states have internal predecessors, (276), 0 states have call successors, (0), 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 00:59:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:31,874 INFO L93 Difference]: Finished difference Result 30582 states and 57524 transitions. [2021-06-05 00:59:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 00:59:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.7317073170731705) internal successors, (276), 41 states have internal predecessors, (276), 0 states have call successors, (0), 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 411 [2021-06-05 00:59:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:31,900 INFO L225 Difference]: With dead ends: 30582 [2021-06-05 00:59:31,900 INFO L226 Difference]: Without dead ends: 30582 [2021-06-05 00:59:31,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 00:59:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30582 states. [2021-06-05 00:59:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30582 to 29439. [2021-06-05 00:59:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29439 states, 29438 states have (on average 1.8825327807595624) internal successors, (55418), 29438 states have internal predecessors, (55418), 0 states have call successors, (0), 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 00:59:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29439 states to 29439 states and 55418 transitions. [2021-06-05 00:59:32,183 INFO L78 Accepts]: Start accepts. Automaton has 29439 states and 55418 transitions. Word has length 411 [2021-06-05 00:59:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:32,183 INFO L482 AbstractCegarLoop]: Abstraction has 29439 states and 55418 transitions. [2021-06-05 00:59:32,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 6.7317073170731705) internal successors, (276), 41 states have internal predecessors, (276), 0 states have call successors, (0), 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 00:59:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 29439 states and 55418 transitions. [2021-06-05 00:59:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-06-05 00:59:32,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:32,220 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 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 00:59:32,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 00:59:32,437 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1234917631, now seen corresponding path program 32 times [2021-06-05 00:59:32,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:32,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051625434] [2021-06-05 00:59:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:33,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051625434] [2021-06-05 00:59:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051625434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829894822] [2021-06-05 00:59:33,122 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 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 00:59:33,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 00:59:33,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 00:59:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-06-05 00:59:33,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829894822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:33,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:33,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-06-05 00:59:33,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022013722] [2021-06-05 00:59:33,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 00:59:33,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 00:59:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 00:59:33,773 INFO L87 Difference]: Start difference. First operand 29439 states and 55418 transitions. Second operand has 43 states, 43 states have (on average 6.674418604651163) internal successors, (287), 43 states have internal predecessors, (287), 0 states have call successors, (0), 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 00:59:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 00:59:34,680 INFO L93 Difference]: Finished difference Result 30916 states and 58192 transitions. [2021-06-05 00:59:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 00:59:34,687 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.674418604651163) internal successors, (287), 43 states have internal predecessors, (287), 0 states have call successors, (0), 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 422 [2021-06-05 00:59:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 00:59:34,713 INFO L225 Difference]: With dead ends: 30916 [2021-06-05 00:59:34,713 INFO L226 Difference]: Without dead ends: 30916 [2021-06-05 00:59:34,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1204.6ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 00:59:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30916 states. [2021-06-05 00:59:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30916 to 30916. [2021-06-05 00:59:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30916 states, 30915 states have (on average 1.8823224971696588) internal successors, (58192), 30915 states have internal predecessors, (58192), 0 states have call successors, (0), 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 00:59:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30916 states to 30916 states and 58192 transitions. [2021-06-05 00:59:35,002 INFO L78 Accepts]: Start accepts. Automaton has 30916 states and 58192 transitions. Word has length 422 [2021-06-05 00:59:35,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 00:59:35,002 INFO L482 AbstractCegarLoop]: Abstraction has 30916 states and 58192 transitions. [2021-06-05 00:59:35,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 6.674418604651163) internal successors, (287), 43 states have internal predecessors, (287), 0 states have call successors, (0), 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 00:59:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30916 states and 58192 transitions. [2021-06-05 00:59:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 00:59:35,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 00:59:35,032 INFO L521 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 00:59:35,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 00:59:35,237 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 00:59:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 00:59:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1359981869, now seen corresponding path program 33 times [2021-06-05 00:59:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 00:59:35,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463994357] [2021-06-05 00:59:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 00:59:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 00:59:37,611 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 00:59:37,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 00:59:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463994357] [2021-06-05 00:59:37,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463994357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567099951] [2021-06-05 00:59:37,611 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 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 00:59:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-06-05 00:59:38,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 00:59:38,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 00:59:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 00:59:39,131 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 00:59:39,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567099951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 00:59:39,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 00:59:39,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-06-05 00:59:39,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073242371] [2021-06-05 00:59:39,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 00:59:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 00:59:39,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 00:59:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 00:59:39,135 INFO L87 Difference]: Start difference. First operand 30916 states and 58192 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 01:00:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:00:01,944 INFO L93 Difference]: Finished difference Result 150995 states and 288642 transitions. [2021-06-05 01:00:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-06-05 01:00:01,944 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 01:00:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:00:02,090 INFO L225 Difference]: With dead ends: 150995 [2021-06-05 01:00:02,090 INFO L226 Difference]: Without dead ends: 150983 [2021-06-05 01:00:02,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32634 ImplicationChecksByTransitivity, 10036.3ms TimeCoverageRelationStatistics Valid=1162, Invalid=102844, Unknown=0, NotChecked=0, Total=104006 [2021-06-05 01:00:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150983 states. [2021-06-05 01:00:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150983 to 32534. [2021-06-05 01:00:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32534 states, 32533 states have (on average 1.8930009528786156) internal successors, (61585), 32533 states have internal predecessors, (61585), 0 states have call successors, (0), 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 01:00:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32534 states to 32534 states and 61585 transitions. [2021-06-05 01:00:02,942 INFO L78 Accepts]: Start accepts. Automaton has 32534 states and 61585 transitions. Word has length 433 [2021-06-05 01:00:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:00:02,942 INFO L482 AbstractCegarLoop]: Abstraction has 32534 states and 61585 transitions. [2021-06-05 01:00:02,942 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 01:00:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32534 states and 61585 transitions. [2021-06-05 01:00:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:00:02,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:00:02,976 INFO L521 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 01:00:03,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 01:00:03,176 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:00:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:00:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash 454116571, now seen corresponding path program 34 times [2021-06-05 01:00:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:00:03,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808723055] [2021-06-05 01:00:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:00:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:00:05,745 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 01:00:05,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:00:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808723055] [2021-06-05 01:00:05,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808723055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:00:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358193118] [2021-06-05 01:00:05,745 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 01:00:06,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 01:00:06,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:00:06,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:00:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:00:07,024 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 01:00:07,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358193118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:00:07,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:00:07,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-06-05 01:00:07,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759336146] [2021-06-05 01:00:07,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 01:00:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:00:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 01:00:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 01:00:07,027 INFO L87 Difference]: Start difference. First operand 32534 states and 61585 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:00:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:00:32,434 INFO L93 Difference]: Finished difference Result 167871 states and 321305 transitions. [2021-06-05 01:00:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2021-06-05 01:00:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:00:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:00:32,587 INFO L225 Difference]: With dead ends: 167871 [2021-06-05 01:00:32,587 INFO L226 Difference]: Without dead ends: 167847 [2021-06-05 01:00:32,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38769 ImplicationChecksByTransitivity, 11320.8ms TimeCoverageRelationStatistics Valid=1265, Invalid=118797, Unknown=0, NotChecked=0, Total=120062 [2021-06-05 01:00:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167847 states. [2021-06-05 01:00:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167847 to 33952. [2021-06-05 01:00:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33952 states, 33951 states have (on average 1.8926688462784602) internal successors, (64258), 33951 states have internal predecessors, (64258), 0 states have call successors, (0), 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 01:00:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33952 states to 33952 states and 64258 transitions. [2021-06-05 01:00:33,539 INFO L78 Accepts]: Start accepts. Automaton has 33952 states and 64258 transitions. Word has length 433 [2021-06-05 01:00:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:00:33,540 INFO L482 AbstractCegarLoop]: Abstraction has 33952 states and 64258 transitions. [2021-06-05 01:00:33,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:00:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 33952 states and 64258 transitions. [2021-06-05 01:00:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:00:33,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:00:33,572 INFO L521 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 01:00:33,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 01:00:33,777 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:00:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:00:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1557636753, now seen corresponding path program 35 times [2021-06-05 01:00:33,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:00:33,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369510378] [2021-06-05 01:00:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:00:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:00:36,389 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 01:00:36,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:00:36,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369510378] [2021-06-05 01:00:36,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369510378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:00:36,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069916792] [2021-06-05 01:00:36,389 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 01:00:36,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-06-05 01:00:36,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:00:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:00:36,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:00:37,473 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 01:00:37,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069916792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:00:37,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:00:37,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-06-05 01:00:37,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536959873] [2021-06-05 01:00:37,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 01:00:37,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:00:37,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 01:00:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 01:00:37,476 INFO L87 Difference]: Start difference. First operand 33952 states and 64258 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:01:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:01:00,887 INFO L93 Difference]: Finished difference Result 153419 states and 293523 transitions. [2021-06-05 01:01:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-06-05 01:01:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:01:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:01:01,104 INFO L225 Difference]: With dead ends: 153419 [2021-06-05 01:01:01,104 INFO L226 Difference]: Without dead ends: 153407 [2021-06-05 01:01:01,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33405 ImplicationChecksByTransitivity, 10694.6ms TimeCoverageRelationStatistics Valid=1176, Invalid=105426, Unknown=0, NotChecked=0, Total=106602 [2021-06-05 01:01:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153407 states. [2021-06-05 01:01:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153407 to 34047. [2021-06-05 01:01:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34047 states, 34046 states have (on average 1.892703988721142) internal successors, (64439), 34046 states have internal predecessors, (64439), 0 states have call successors, (0), 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 01:01:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34047 states to 34047 states and 64439 transitions. [2021-06-05 01:01:02,027 INFO L78 Accepts]: Start accepts. Automaton has 34047 states and 64439 transitions. Word has length 433 [2021-06-05 01:01:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:01:02,027 INFO L482 AbstractCegarLoop]: Abstraction has 34047 states and 64439 transitions. [2021-06-05 01:01:02,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:01:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 34047 states and 64439 transitions. [2021-06-05 01:01:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:01:02,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:01:02,069 INFO L521 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 01:01:02,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 01:01:02,280 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:01:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:01:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1389996425, now seen corresponding path program 36 times [2021-06-05 01:01:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:01:02,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234707158] [2021-06-05 01:01:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:01:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:01:04,944 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 01:01:04,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:01:04,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234707158] [2021-06-05 01:01:04,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234707158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:01:04,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507285130] [2021-06-05 01:01:04,944 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 01:01:05,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-05 01:01:05,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:01:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:01:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:01:06,152 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 01:01:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507285130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:01:06,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:01:06,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-06-05 01:01:06,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395123529] [2021-06-05 01:01:06,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 01:01:06,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:01:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 01:01:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 01:01:06,154 INFO L87 Difference]: Start difference. First operand 34047 states and 64439 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:01:30,686 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 01:01:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:01:33,444 INFO L93 Difference]: Finished difference Result 186974 states and 358074 transitions. [2021-06-05 01:01:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2021-06-05 01:01:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:01:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:01:33,609 INFO L225 Difference]: With dead ends: 186974 [2021-06-05 01:01:33,609 INFO L226 Difference]: Without dead ends: 186938 [2021-06-05 01:01:33,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45735 ImplicationChecksByTransitivity, 12301.8ms TimeCoverageRelationStatistics Valid=1372, Invalid=136640, Unknown=0, NotChecked=0, Total=138012 [2021-06-05 01:01:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186938 states. [2021-06-05 01:01:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186938 to 35280. [2021-06-05 01:01:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35280 states, 35279 states have (on average 1.8920037416026532) internal successors, (66748), 35279 states have internal predecessors, (66748), 0 states have call successors, (0), 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 01:01:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 66748 transitions. [2021-06-05 01:01:34,735 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 66748 transitions. Word has length 433 [2021-06-05 01:01:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:01:34,735 INFO L482 AbstractCegarLoop]: Abstraction has 35280 states and 66748 transitions. [2021-06-05 01:01:34,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:01:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 66748 transitions. [2021-06-05 01:01:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:01:34,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:01:34,767 INFO L521 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 01:01:34,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 01:01:34,968 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:01:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:01:34,968 INFO L82 PathProgramCache]: Analyzing trace with hash -816582073, now seen corresponding path program 37 times [2021-06-05 01:01:34,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:01:34,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816802431] [2021-06-05 01:01:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:01:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:01:37,281 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 01:01:37,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:01:37,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816802431] [2021-06-05 01:01:37,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816802431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:01:37,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351768252] [2021-06-05 01:01:37,281 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 01:01:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:01:37,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:01:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:01:38,271 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 01:01:38,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351768252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:01:38,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:01:38,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-06-05 01:01:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153291232] [2021-06-05 01:01:38,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 01:01:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:01:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 01:01:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 01:01:38,273 INFO L87 Difference]: Start difference. First operand 35280 states and 66748 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:02:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:02:01,538 INFO L93 Difference]: Finished difference Result 154911 states and 296328 transitions. [2021-06-05 01:02:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-06-05 01:02:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:02:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:02:01,670 INFO L225 Difference]: With dead ends: 154911 [2021-06-05 01:02:01,670 INFO L226 Difference]: Without dead ends: 154899 [2021-06-05 01:02:01,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33664 ImplicationChecksByTransitivity, 10481.8ms TimeCoverageRelationStatistics Valid=1180, Invalid=106076, Unknown=0, NotChecked=0, Total=107256 [2021-06-05 01:02:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154899 states. [2021-06-05 01:02:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154899 to 35415. [2021-06-05 01:02:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35415 states, 35414 states have (on average 1.8920765798836618) internal successors, (67006), 35414 states have internal predecessors, (67006), 0 states have call successors, (0), 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 01:02:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35415 states to 35415 states and 67006 transitions. [2021-06-05 01:02:02,600 INFO L78 Accepts]: Start accepts. Automaton has 35415 states and 67006 transitions. Word has length 433 [2021-06-05 01:02:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:02:02,601 INFO L482 AbstractCegarLoop]: Abstraction has 35415 states and 67006 transitions. [2021-06-05 01:02:02,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:02:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 35415 states and 67006 transitions. [2021-06-05 01:02:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:02:02,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:02:02,633 INFO L521 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 01:02:02,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 01:02:02,834 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:02:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:02:02,834 INFO L82 PathProgramCache]: Analyzing trace with hash -984222401, now seen corresponding path program 38 times [2021-06-05 01:02:02,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:02:02,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660772581] [2021-06-05 01:02:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:02:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:02:05,245 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 01:02:05,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:02:05,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660772581] [2021-06-05 01:02:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660772581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:02:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666464815] [2021-06-05 01:02:05,246 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:02:05,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 01:02:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:02:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:02:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:02:06,122 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 01:02:06,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666464815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:02:06,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:02:06,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-06-05 01:02:06,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831478171] [2021-06-05 01:02:06,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 01:02:06,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:02:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 01:02:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 01:02:06,123 INFO L87 Difference]: Start difference. First operand 35415 states and 67006 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:02:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:02:31,776 INFO L93 Difference]: Finished difference Result 171634 states and 328702 transitions. [2021-06-05 01:02:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2021-06-05 01:02:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:02:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:02:31,912 INFO L225 Difference]: With dead ends: 171634 [2021-06-05 01:02:31,912 INFO L226 Difference]: Without dead ends: 171610 [2021-06-05 01:02:31,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39609 ImplicationChecksByTransitivity, 11623.6ms TimeCoverageRelationStatistics Valid=1279, Invalid=121571, Unknown=0, NotChecked=0, Total=122850 [2021-06-05 01:02:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171610 states. [2021-06-05 01:02:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171610 to 35440. [2021-06-05 01:02:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35440 states, 35439 states have (on average 1.8921527131126725) internal successors, (67056), 35439 states have internal predecessors, (67056), 0 states have call successors, (0), 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 01:02:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35440 states to 35440 states and 67056 transitions. [2021-06-05 01:02:33,015 INFO L78 Accepts]: Start accepts. Automaton has 35440 states and 67056 transitions. Word has length 433 [2021-06-05 01:02:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:02:33,015 INFO L482 AbstractCegarLoop]: Abstraction has 35440 states and 67056 transitions. [2021-06-05 01:02:33,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:02:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 35440 states and 67056 transitions. [2021-06-05 01:02:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:02:33,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:02:33,046 INFO L521 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 01:02:33,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 01:02:33,247 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:02:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:02:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash -84178615, now seen corresponding path program 39 times [2021-06-05 01:02:33,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:02:33,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102401611] [2021-06-05 01:02:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:02:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:02:35,592 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 01:02:35,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:02:35,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102401611] [2021-06-05 01:02:35,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102401611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:02:35,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642828694] [2021-06-05 01:02:35,593 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:02:36,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-05 01:02:36,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:02:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:02:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:02:36,917 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 01:02:36,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642828694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:02:36,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:02:36,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-06-05 01:02:36,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983760177] [2021-06-05 01:02:36,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 01:02:36,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:02:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 01:02:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 01:02:36,918 INFO L87 Difference]: Start difference. First operand 35440 states and 67056 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:03:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:03:05,705 INFO L93 Difference]: Finished difference Result 172437 states and 330220 transitions. [2021-06-05 01:03:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2021-06-05 01:03:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:03:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:03:05,856 INFO L225 Difference]: With dead ends: 172437 [2021-06-05 01:03:05,856 INFO L226 Difference]: Without dead ends: 172413 [2021-06-05 01:03:05,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40743 ImplicationChecksByTransitivity, 12851.4ms TimeCoverageRelationStatistics Valid=1295, Invalid=124375, Unknown=0, NotChecked=0, Total=125670 [2021-06-05 01:03:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172413 states. [2021-06-05 01:03:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172413 to 35755. [2021-06-05 01:03:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35755 states, 35754 states have (on average 1.8921798959556972) internal successors, (67653), 35754 states have internal predecessors, (67653), 0 states have call successors, (0), 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 01:03:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35755 states to 35755 states and 67653 transitions. [2021-06-05 01:03:06,953 INFO L78 Accepts]: Start accepts. Automaton has 35755 states and 67653 transitions. Word has length 433 [2021-06-05 01:03:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:03:06,953 INFO L482 AbstractCegarLoop]: Abstraction has 35755 states and 67653 transitions. [2021-06-05 01:03:06,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:03:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 35755 states and 67653 transitions. [2021-06-05 01:03:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:03:06,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:03:06,991 INFO L521 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 01:03:07,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 01:03:07,195 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:03:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:03:07,196 INFO L82 PathProgramCache]: Analyzing trace with hash -81940143, now seen corresponding path program 40 times [2021-06-05 01:03:07,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:03:07,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560088572] [2021-06-05 01:03:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:03:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:03:09,661 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 01:03:09,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:03:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560088572] [2021-06-05 01:03:09,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560088572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:03:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687046118] [2021-06-05 01:03:09,662 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:03:09,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 01:03:09,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:03:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:03:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:03:10,586 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 01:03:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687046118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:03:10,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:03:10,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-06-05 01:03:10,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422610151] [2021-06-05 01:03:10,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-05 01:03:10,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:03:10,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-05 01:03:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 01:03:10,588 INFO L87 Difference]: Start difference. First operand 35755 states and 67653 transitions. Second operand has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 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 01:03:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:03:43,165 INFO L93 Difference]: Finished difference Result 208203 states and 398901 transitions. [2021-06-05 01:03:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2021-06-05 01:03:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 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 01:03:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:03:43,374 INFO L225 Difference]: With dead ends: 208203 [2021-06-05 01:03:43,374 INFO L226 Difference]: Without dead ends: 208155 [2021-06-05 01:03:43,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53604 ImplicationChecksByTransitivity, 14512.6ms TimeCoverageRelationStatistics Valid=1483, Invalid=156523, Unknown=0, NotChecked=0, Total=158006 [2021-06-05 01:03:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208155 states. [2021-06-05 01:03:44,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208155 to 36602. [2021-06-05 01:03:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36602 states, 36601 states have (on average 1.891533018223546) internal successors, (69232), 36601 states have internal predecessors, (69232), 0 states have call successors, (0), 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 01:03:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36602 states to 36602 states and 69232 transitions. [2021-06-05 01:03:44,651 INFO L78 Accepts]: Start accepts. Automaton has 36602 states and 69232 transitions. Word has length 433 [2021-06-05 01:03:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:03:44,651 INFO L482 AbstractCegarLoop]: Abstraction has 36602 states and 69232 transitions. [2021-06-05 01:03:44,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 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 01:03:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 36602 states and 69232 transitions. [2021-06-05 01:03:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:03:44,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:03:44,685 INFO L521 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 01:03:44,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:03:44,887 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:03:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:03:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2063345661, now seen corresponding path program 41 times [2021-06-05 01:03:44,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:03:44,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70344470] [2021-06-05 01:03:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:03:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:03:47,114 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 01:03:47,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:03:47,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70344470] [2021-06-05 01:03:47,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70344470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:03:47,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575688253] [2021-06-05 01:03:47,115 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:03:47,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-05 01:03:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:03:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:03:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:03:48,165 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 01:03:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575688253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:03:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:03:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-06-05 01:03:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195083478] [2021-06-05 01:03:48,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 01:03:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:03:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 01:03:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 01:03:48,167 INFO L87 Difference]: Start difference. First operand 36602 states and 69232 transitions. Second operand has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:04:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:04:11,710 INFO L93 Difference]: Finished difference Result 156403 states and 299133 transitions. [2021-06-05 01:04:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2021-06-05 01:04:11,711 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:04:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:04:11,831 INFO L225 Difference]: With dead ends: 156403 [2021-06-05 01:04:11,832 INFO L226 Difference]: Without dead ends: 156391 [2021-06-05 01:04:11,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33924 ImplicationChecksByTransitivity, 10299.4ms TimeCoverageRelationStatistics Valid=1184, Invalid=106728, Unknown=0, NotChecked=0, Total=107912 [2021-06-05 01:04:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156391 states. [2021-06-05 01:04:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156391 to 36777. [2021-06-05 01:04:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36777 states, 36776 states have (on average 1.8916412877963888) internal successors, (69567), 36776 states have internal predecessors, (69567), 0 states have call successors, (0), 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 01:04:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36777 states to 36777 states and 69567 transitions. [2021-06-05 01:04:12,684 INFO L78 Accepts]: Start accepts. Automaton has 36777 states and 69567 transitions. Word has length 433 [2021-06-05 01:04:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:04:12,684 INFO L482 AbstractCegarLoop]: Abstraction has 36777 states and 69567 transitions. [2021-06-05 01:04:12,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.242857142857143) internal successors, (437), 70 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 01:04:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36777 states and 69567 transitions. [2021-06-05 01:04:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:04:12,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:04:12,718 INFO L521 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 01:04:12,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:04:12,918 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:04:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:04:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1895705333, now seen corresponding path program 42 times [2021-06-05 01:04:12,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:04:12,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538236780] [2021-06-05 01:04:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:04:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:04:15,596 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 01:04:15,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:04:15,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538236780] [2021-06-05 01:04:15,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538236780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:04:15,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976807986] [2021-06-05 01:04:15,597 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:04:16,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-06-05 01:04:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:04:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:04:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:04:16,863 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 01:04:16,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976807986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:04:16,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:04:16,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-06-05 01:04:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707625936] [2021-06-05 01:04:16,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 01:04:16,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:04:16,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 01:04:16,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 01:04:16,865 INFO L87 Difference]: Start difference. First operand 36777 states and 69567 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:04:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:04:42,599 INFO L93 Difference]: Finished difference Result 173126 states and 331507 transitions. [2021-06-05 01:04:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 345 states. [2021-06-05 01:04:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:04:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:04:42,742 INFO L225 Difference]: With dead ends: 173126 [2021-06-05 01:04:42,742 INFO L226 Difference]: Without dead ends: 173102 [2021-06-05 01:04:42,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39891 ImplicationChecksByTransitivity, 11356.7ms TimeCoverageRelationStatistics Valid=1283, Invalid=122269, Unknown=0, NotChecked=0, Total=123552 [2021-06-05 01:04:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173102 states. [2021-06-05 01:04:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173102 to 36842. [2021-06-05 01:04:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36842 states, 36841 states have (on average 1.891751038245433) internal successors, (69694), 36841 states have internal predecessors, (69694), 0 states have call successors, (0), 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 01:04:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36842 states to 36842 states and 69694 transitions. [2021-06-05 01:04:43,700 INFO L78 Accepts]: Start accepts. Automaton has 36842 states and 69694 transitions. Word has length 433 [2021-06-05 01:04:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:04:43,700 INFO L482 AbstractCegarLoop]: Abstraction has 36842 states and 69694 transitions. [2021-06-05 01:04:43,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:04:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 36842 states and 69694 transitions. [2021-06-05 01:04:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:04:43,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:04:43,735 INFO L521 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 01:04:43,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:04:43,935 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:04:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:04:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1499218177, now seen corresponding path program 43 times [2021-06-05 01:04:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:04:43,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161516733] [2021-06-05 01:04:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:04:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:04:46,433 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 01:04:46,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:04:46,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161516733] [2021-06-05 01:04:46,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161516733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:04:46,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524890908] [2021-06-05 01:04:46,433 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:04:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:04:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:04:46,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:04:47,290 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 01:04:47,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524890908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:04:47,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:04:47,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-06-05 01:04:47,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400493746] [2021-06-05 01:04:47,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 01:04:47,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:04:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 01:04:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 01:04:47,292 INFO L87 Difference]: Start difference. First operand 36842 states and 69694 transitions. Second operand has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:05:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 01:05:11,488 INFO L93 Difference]: Finished difference Result 156843 states and 299985 transitions. [2021-06-05 01:05:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-06-05 01:05:11,488 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:05:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 01:05:11,616 INFO L225 Difference]: With dead ends: 156843 [2021-06-05 01:05:11,616 INFO L226 Difference]: Without dead ends: 156831 [2021-06-05 01:05:11,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34710 ImplicationChecksByTransitivity, 10814.6ms TimeCoverageRelationStatistics Valid=1198, Invalid=109358, Unknown=0, NotChecked=0, Total=110556 [2021-06-05 01:05:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156831 states. [2021-06-05 01:05:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156831 to 36937. [2021-06-05 01:05:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36937 states, 36936 states have (on average 1.8917857916395928) internal successors, (69875), 36936 states have internal predecessors, (69875), 0 states have call successors, (0), 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 01:05:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36937 states to 36937 states and 69875 transitions. [2021-06-05 01:05:12,592 INFO L78 Accepts]: Start accepts. Automaton has 36937 states and 69875 transitions. Word has length 433 [2021-06-05 01:05:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 01:05:12,592 INFO L482 AbstractCegarLoop]: Abstraction has 36937 states and 69875 transitions. [2021-06-05 01:05:12,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 6.154929577464789) internal successors, (437), 71 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 01:05:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 36937 states and 69875 transitions. [2021-06-05 01:05:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-06-05 01:05:12,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 01:05:12,628 INFO L521 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 01:05:12,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:05:12,829 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 01:05:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 01:05:12,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1496979705, now seen corresponding path program 44 times [2021-06-05 01:05:12,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 01:05:12,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508929308] [2021-06-05 01:05:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 01:05:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 01:05:14,846 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 01:05:15,157 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 01:05:15,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 01:05:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508929308] [2021-06-05 01:05:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508929308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:05:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635864180] [2021-06-05 01:05:15,157 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 01:05:15,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 01:05:15,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 01:05:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-06-05 01:05:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 01:05:16,070 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 01:05:16,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635864180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 01:05:16,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 01:05:16,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-06-05 01:05:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647222596] [2021-06-05 01:05:16,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-05 01:05:16,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 01:05:16,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-05 01:05:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 01:05:16,072 INFO L87 Difference]: Start difference. First operand 36937 states and 69875 transitions. Second operand has 72 states, 72 states have (on average 6.069444444444445) internal successors, (437), 72 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 01:05:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2021-06-05 01:05:34,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 01:05:34,641 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 01:05:34,643 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 01:05:34,644 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 01:05:34,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:05:34 BasicIcfg [2021-06-05 01:05:34,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 01:05:34,645 INFO L168 Benchmark]: Toolchain (without parser) took 704013.98 ms. Allocated memory was 371.2 MB in the beginning and 6.0 GB in the end (delta: 5.6 GB). Free memory was 331.9 MB in the beginning and 3.9 GB in the end (delta: -3.5 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-05 01:05:34,645 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 371.2 MB. Free memory is still 351.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 01:05:34,645 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.59 ms. Allocated memory is still 371.2 MB. Free memory was 331.8 MB in the beginning and 280.1 MB in the end (delta: 51.7 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.0 GB. [2021-06-05 01:05:34,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.71 ms. Allocated memory is still 371.2 MB. Free memory was 280.1 MB in the beginning and 277.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 01:05:34,645 INFO L168 Benchmark]: Boogie Preprocessor took 36.64 ms. Allocated memory is still 371.2 MB. Free memory was 277.2 MB in the beginning and 275.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 01:05:34,645 INFO L168 Benchmark]: RCFGBuilder took 431.35 ms. Allocated memory is still 371.2 MB. Free memory was 275.9 MB in the beginning and 249.3 MB in the end (delta: 26.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2021-06-05 01:05:34,645 INFO L168 Benchmark]: TraceAbstraction took 702816.36 ms. Allocated memory was 371.2 MB in the beginning and 6.0 GB in the end (delta: 5.6 GB). Free memory was 248.6 MB in the beginning and 3.9 GB in the end (delta: -3.6 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. [2021-06-05 01:05:34,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 371.2 MB. Free memory is still 351.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 657.59 ms. Allocated memory is still 371.2 MB. Free memory was 331.8 MB in the beginning and 280.1 MB in the end (delta: 51.7 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 64.71 ms. Allocated memory is still 371.2 MB. Free memory was 280.1 MB in the beginning and 277.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 36.64 ms. Allocated memory is still 371.2 MB. Free memory was 277.2 MB in the beginning and 275.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 431.35 ms. Allocated memory is still 371.2 MB. Free memory was 275.9 MB in the beginning and 249.3 MB in the end (delta: 26.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 702816.36 ms. Allocated memory was 371.2 MB in the beginning and 6.0 GB in the end (delta: 5.6 GB). Free memory was 248.6 MB in the beginning and 3.9 GB in the end (delta: -3.6 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1343]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (36937states) and FLOYD_HOARE automaton (currently 243 states, 72 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 276 known predicates. - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (36937states) and FLOYD_HOARE automaton (currently 243 states, 72 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 276 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 702703.8ms, OverallIterations: 47, TraceHistogramMax: 20, EmptinessCheckTime: 841.9ms, AutomataDifference: 606148.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57345 SDtfs, 169512 SDslu, 3551356 SDs, 0 SdLazy, 530923 SolverSat, 10622 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 147227.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25015 GetRequests, 15095 SyntacticMatches, 24 SemanticMatches, 9895 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959326 ImplicationChecksByTransitivity, 425144.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36937occurred in iteration=46, InterpolantAutomatonStates: 9208, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15687.1ms AutomataMinimizationTime, 46 MinimizatonAttempts, 1485219 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1373.7ms SsaConstructionTime, 7325.2ms SatisfiabilityAnalysisTime, 59548.8ms InterpolantComputationTime, 26216 NumberOfCodeBlocks, 25615 NumberOfCodeBlocksAsserted, 421 NumberOfCheckSat, 26125 ConstructedInterpolants, 0 QuantifiedInterpolants, 104219 SizeOfPredicates, 1124 NumberOfNonLiveVariables, 25102 ConjunctsInSsa, 2664 ConjunctsInUnsatCore, 91 InterpolantComputations, 4 PerfectInterpolantSequences, 41720/169369 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