/usr/bin/java -Xmx8000000000 -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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:54:59,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:54:59,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:54:59,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 16:54:59,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:54:59,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:54:59,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:54:59,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:54:59,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:54:59,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:54:59,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:54:59,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:54:59,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:54:59,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:54:59,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:54:59,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:54:59,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:54:59,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:54:59,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:54:59,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:54:59,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:54:59,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-07-09 16:54:59,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:54:59,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:54:59,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:54:59,096 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 [2021-07-09 16:54:59,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:54:59,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:54:59,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:54:59,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:54:59,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:54:59,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:54:59,112 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:54:59,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:54:59,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:54:59,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:54:59,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:54:59,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:54:59,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:54:59,115 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:54:59,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:54:59,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:54:59,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:54:59,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:54:59,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:54:59,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:54:59,333 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:54:59,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-07-09 16:54:59,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9695096bf/3c2758aea331465dba8c95435d27711f/FLAG6b1c78d1b [2021-07-09 16:54:59,822 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:54:59,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-07-09 16:54:59,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9695096bf/3c2758aea331465dba8c95435d27711f/FLAG6b1c78d1b [2021-07-09 16:54:59,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9695096bf/3c2758aea331465dba8c95435d27711f [2021-07-09 16:54:59,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:54:59,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:54:59,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:54:59,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:54:59,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:54:59,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:54:59" (1/1) ... [2021-07-09 16:54:59,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34493e5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:54:59, skipping insertion in model container [2021-07-09 16:54:59,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:54:59" (1/1) ... [2021-07-09 16:54:59,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:54:59,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:55:00,030 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] [2021-07-09 16:55:00,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:55:00,276 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:55:00,283 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] [2021-07-09 16:55:00,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:55:00,352 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:55:00,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00 WrapperNode [2021-07-09 16:55:00,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:55:00,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:55:00,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:55:00,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:55:00,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:55:00,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:55:00,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:55:00,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:55:00,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (1/1) ... [2021-07-09 16:55:00,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:55:00,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:55:00,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:55:00,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:55:00,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (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 [2021-07-09 16:55:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:55:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:55:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 16:55:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:55:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-09 16:55:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-07-09 16:55:00,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-07-09 16:55:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:55:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:55:00,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:55:00,457 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 16:55:00,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:55:00,759 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-09 16:55:00,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:55:00 BoogieIcfgContainer [2021-07-09 16:55:00,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:55:00,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:55:00,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:55:00,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:55:00,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:54:59" (1/3) ... [2021-07-09 16:55:00,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f9f1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:55:00, skipping insertion in model container [2021-07-09 16:55:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:55:00" (2/3) ... [2021-07-09 16:55:00,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f9f1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:55:00, skipping insertion in model container [2021-07-09 16:55:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:55:00" (3/3) ... [2021-07-09 16:55:00,765 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-07-09 16:55:00,770 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:55:00,770 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:55:00,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:55:00,770 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:55:00,786 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,786 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,788 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,789 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,791 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,791 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,791 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,791 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,791 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,791 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,792 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,792 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,793 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:55:00,798 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-07-09 16:55:00,812 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 16:55:00,823 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:55:00,824 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:55:00,824 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:55:00,824 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:55:00,824 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:55:00,824 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:55:00,824 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:55:00,824 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:55:00,831 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 90 transitions, 188 flow [2021-07-09 16:55:00,849 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 347 states have (on average 2.0403458213256482) internal successors, (708), 347 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:55:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 347 states have (on average 2.0403458213256482) internal successors, (708), 347 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:55:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 16:55:00,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:00,865 INFO L508 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] [2021-07-09 16:55:00,865 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1593361763, now seen corresponding path program 1 times [2021-07-09 16:55:00,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:00,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388511801] [2021-07-09 16:55:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:01,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388511801] [2021-07-09 16:55:01,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388511801] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:01,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:55:01,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 16:55:01,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194061835] [2021-07-09 16:55:01,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-09 16:55:01,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:01,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-09 16:55:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 16:55:01,056 INFO L87 Difference]: Start difference. First operand has 348 states, 347 states have (on average 2.0403458213256482) internal successors, (708), 347 states have internal predecessors, (708), 0 states have call successors, (0), 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) [2021-07-09 16:55:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:01,086 INFO L93 Difference]: Finished difference Result 346 states and 652 transitions. [2021-07-09 16:55:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-09 16:55:01,087 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 [2021-07-09 16:55:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:01,102 INFO L225 Difference]: With dead ends: 346 [2021-07-09 16:55:01,102 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 16:55:01,103 INFO L764 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 [2021-07-09 16:55:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 16:55:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-07-09 16:55:01,155 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) [2021-07-09 16:55:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 544 transitions. [2021-07-09 16:55:01,159 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 544 transitions. Word has length 53 [2021-07-09 16:55:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:01,160 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 544 transitions. [2021-07-09 16:55:01,162 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) [2021-07-09 16:55:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 544 transitions. [2021-07-09 16:55:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 16:55:01,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:01,164 INFO L508 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] [2021-07-09 16:55:01,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:55:01,165 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -436565571, now seen corresponding path program 1 times [2021-07-09 16:55:01,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:01,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279892753] [2021-07-09 16:55:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:01,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:01,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279892753] [2021-07-09 16:55:01,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279892753] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:01,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:55:01,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:55:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473173368] [2021-07-09 16:55:01,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:55:01,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:55:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:55:01,258 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) [2021-07-09 16:55:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:01,290 INFO L93 Difference]: Finished difference Result 432 states and 824 transitions. [2021-07-09 16:55:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:55:01,291 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 [2021-07-09 16:55:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:01,292 INFO L225 Difference]: With dead ends: 432 [2021-07-09 16:55:01,292 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 16:55:01,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:55:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 16:55:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 306. [2021-07-09 16:55:01,299 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) [2021-07-09 16:55:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 572 transitions. [2021-07-09 16:55:01,300 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 572 transitions. Word has length 53 [2021-07-09 16:55:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:01,300 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 572 transitions. [2021-07-09 16:55:01,300 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) [2021-07-09 16:55:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 572 transitions. [2021-07-09 16:55:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-09 16:55:01,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:01,302 INFO L508 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] [2021-07-09 16:55:01,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:55:01,303 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:01,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:01,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1947629737, now seen corresponding path program 1 times [2021-07-09 16:55:01,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:01,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675151283] [2021-07-09 16:55:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:01,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:01,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675151283] [2021-07-09 16:55:01,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675151283] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:01,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:55:01,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:55:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548822953] [2021-07-09 16:55:01,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:55:01,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:55:01,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:55:01,371 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) [2021-07-09 16:55:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:01,385 INFO L93 Difference]: Finished difference Result 439 states and 838 transitions. [2021-07-09 16:55:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:55:01,386 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 [2021-07-09 16:55:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:01,387 INFO L225 Difference]: With dead ends: 439 [2021-07-09 16:55:01,387 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 16:55:01,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:55:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 16:55:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 325. [2021-07-09 16:55:01,393 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) [2021-07-09 16:55:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 610 transitions. [2021-07-09 16:55:01,394 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 610 transitions. Word has length 64 [2021-07-09 16:55:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:01,394 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 610 transitions. [2021-07-09 16:55:01,394 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) [2021-07-09 16:55:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 610 transitions. [2021-07-09 16:55:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-09 16:55:01,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:01,396 INFO L508 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] [2021-07-09 16:55:01,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:55:01,396 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash 673821708, now seen corresponding path program 1 times [2021-07-09 16:55:01,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:01,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224668938] [2021-07-09 16:55:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:01,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224668938] [2021-07-09 16:55:01,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224668938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405728041] [2021-07-09 16:55:01,464 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 [2021-07-09 16:55:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-07-09 16:55:01,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:01,743 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 [2021-07-09 16:55:01,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 16:55:01,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 16:55:01,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-09 16:55:01,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-07-09 16:55:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405728041] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:55:01,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:55:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-07-09 16:55:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688700996] [2021-07-09 16:55:01,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:55:01,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:55:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:55:01,822 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) [2021-07-09 16:55:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:01,847 INFO L93 Difference]: Finished difference Result 307 states and 565 transitions. [2021-07-09 16:55:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:55:01,848 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 [2021-07-09 16:55:01,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:01,849 INFO L225 Difference]: With dead ends: 307 [2021-07-09 16:55:01,849 INFO L226 Difference]: Without dead ends: 307 [2021-07-09 16:55:01,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:55:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-09 16:55:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-07-09 16:55:01,856 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) [2021-07-09 16:55:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 565 transitions. [2021-07-09 16:55:01,857 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 565 transitions. Word has length 72 [2021-07-09 16:55:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:01,857 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 565 transitions. [2021-07-09 16:55:01,857 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) [2021-07-09 16:55:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 565 transitions. [2021-07-09 16:55:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-09 16:55:01,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:01,858 INFO L508 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] [2021-07-09 16:55:02,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:02,066 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1055514508, now seen corresponding path program 2 times [2021-07-09 16:55:02,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:02,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008407376] [2021-07-09 16:55:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:02,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:02,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008407376] [2021-07-09 16:55:02,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008407376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:02,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138876251] [2021-07-09 16:55:02,109 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 [2021-07-09 16:55:02,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:55:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 16:55:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:55:02,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138876251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:02,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:02,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 16:55:02,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978015314] [2021-07-09 16:55:02,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:55:02,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:55:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:55:02,333 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) [2021-07-09 16:55:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:02,643 INFO L93 Difference]: Finished difference Result 1009 states and 1897 transitions. [2021-07-09 16:55:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:55:02,644 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 [2021-07-09 16:55:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:02,647 INFO L225 Difference]: With dead ends: 1009 [2021-07-09 16:55:02,647 INFO L226 Difference]: Without dead ends: 1009 [2021-07-09 16:55:02,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:55:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-09 16:55:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 658. [2021-07-09 16:55:02,657 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) [2021-07-09 16:55:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1240 transitions. [2021-07-09 16:55:02,659 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1240 transitions. Word has length 72 [2021-07-09 16:55:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:02,659 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 1240 transitions. [2021-07-09 16:55:02,659 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) [2021-07-09 16:55:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1240 transitions. [2021-07-09 16:55:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-07-09 16:55:02,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:02,660 INFO L508 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] [2021-07-09 16:55:02,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:02,876 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 881659993, now seen corresponding path program 3 times [2021-07-09 16:55:02,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:02,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782150244] [2021-07-09 16:55:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 16:55:02,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782150244] [2021-07-09 16:55:02,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782150244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:02,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559310980] [2021-07-09 16:55:02,972 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 [2021-07-09 16:55:03,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:55:03,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:55:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 16:55:03,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559310980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:03,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:03,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 16:55:03,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200376000] [2021-07-09 16:55:03,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 16:55:03,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:03,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 16:55:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:55:03,221 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) [2021-07-09 16:55:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:03,272 INFO L93 Difference]: Finished difference Result 1046 states and 1980 transitions. [2021-07-09 16:55:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:55:03,272 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 [2021-07-09 16:55:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:03,276 INFO L225 Difference]: With dead ends: 1046 [2021-07-09 16:55:03,276 INFO L226 Difference]: Without dead ends: 1046 [2021-07-09 16:55:03,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:55:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-07-09 16:55:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 875. [2021-07-09 16:55:03,287 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) [2021-07-09 16:55:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1656 transitions. [2021-07-09 16:55:03,289 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1656 transitions. Word has length 91 [2021-07-09 16:55:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:03,291 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1656 transitions. [2021-07-09 16:55:03,291 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) [2021-07-09 16:55:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1656 transitions. [2021-07-09 16:55:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-07-09 16:55:03,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:03,296 INFO L508 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] [2021-07-09 16:55:03,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:03,501 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -911400325, now seen corresponding path program 4 times [2021-07-09 16:55:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:03,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880938745] [2021-07-09 16:55:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:55:03,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:03,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880938745] [2021-07-09 16:55:03,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880938745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:03,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524211146] [2021-07-09 16:55:03,588 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 [2021-07-09 16:55:03,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:55:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:55:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:55:03,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524211146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:03,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:03,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 16:55:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013875357] [2021-07-09 16:55:03,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 16:55:03,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 16:55:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:55:03,808 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) [2021-07-09 16:55:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:03,862 INFO L93 Difference]: Finished difference Result 1341 states and 2534 transitions. [2021-07-09 16:55:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:55:03,863 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 [2021-07-09 16:55:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:03,866 INFO L225 Difference]: With dead ends: 1341 [2021-07-09 16:55:03,866 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 16:55:03,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:55:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 16:55:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1149. [2021-07-09 16:55:03,909 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) [2021-07-09 16:55:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2177 transitions. [2021-07-09 16:55:03,912 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2177 transitions. Word has length 102 [2021-07-09 16:55:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:03,912 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 2177 transitions. [2021-07-09 16:55:03,912 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) [2021-07-09 16:55:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2177 transitions. [2021-07-09 16:55:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-09 16:55:03,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:03,914 INFO L508 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] [2021-07-09 16:55:04,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:04,132 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1460877338, now seen corresponding path program 5 times [2021-07-09 16:55:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:04,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635377814] [2021-07-09 16:55:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:55:04,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635377814] [2021-07-09 16:55:04,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635377814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026348811] [2021-07-09 16:55:04,189 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 [2021-07-09 16:55:04,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 16:55:04,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:55:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:55:04,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026348811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:04,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 16:55:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193687898] [2021-07-09 16:55:04,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:55:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:55:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:55:04,403 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) [2021-07-09 16:55:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:04,472 INFO L93 Difference]: Finished difference Result 1615 states and 3055 transitions. [2021-07-09 16:55:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:55:04,472 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 [2021-07-09 16:55:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:04,477 INFO L225 Difference]: With dead ends: 1615 [2021-07-09 16:55:04,477 INFO L226 Difference]: Without dead ends: 1615 [2021-07-09 16:55:04,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:55:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-07-09 16:55:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1423. [2021-07-09 16:55:04,495 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) [2021-07-09 16:55:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 2698 transitions. [2021-07-09 16:55:04,498 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 2698 transitions. Word has length 110 [2021-07-09 16:55:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:04,498 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 2698 transitions. [2021-07-09 16:55:04,499 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) [2021-07-09 16:55:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 2698 transitions. [2021-07-09 16:55:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-07-09 16:55:04,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:04,501 INFO L508 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] [2021-07-09 16:55:04,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:04,717 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:04,717 INFO L82 PathProgramCache]: Analyzing trace with hash -313404847, now seen corresponding path program 6 times [2021-07-09 16:55:04,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:04,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498358991] [2021-07-09 16:55:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:55:04,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:04,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498358991] [2021-07-09 16:55:04,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498358991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:04,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034547291] [2021-07-09 16:55:04,796 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 [2021-07-09 16:55:04,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:55:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:55:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:55:05,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034547291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:05,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 16:55:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093932508] [2021-07-09 16:55:05,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:55:05,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:55:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:55:05,120 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) [2021-07-09 16:55:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:07,580 INFO L93 Difference]: Finished difference Result 2733 states and 5156 transitions. [2021-07-09 16:55:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-07-09 16:55:07,581 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 [2021-07-09 16:55:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:07,588 INFO L225 Difference]: With dead ends: 2733 [2021-07-09 16:55:07,588 INFO L226 Difference]: Without dead ends: 2733 [2021-07-09 16:55:07,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11215 ImplicationChecksByTransitivity, 2145.7ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-07-09 16:55:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-07-09 16:55:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2124. [2021-07-09 16:55:07,626 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) [2021-07-09 16:55:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 4028 transitions. [2021-07-09 16:55:07,630 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 4028 transitions. Word has length 118 [2021-07-09 16:55:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:07,631 INFO L482 AbstractCegarLoop]: Abstraction has 2124 states and 4028 transitions. [2021-07-09 16:55:07,631 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) [2021-07-09 16:55:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 4028 transitions. [2021-07-09 16:55:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-07-09 16:55:07,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:07,634 INFO L508 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] [2021-07-09 16:55:07,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:07,849 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash 44909880, now seen corresponding path program 7 times [2021-07-09 16:55:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740286485] [2021-07-09 16:55:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-09 16:55:07,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:07,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740286485] [2021-07-09 16:55:07,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740286485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:07,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649366419] [2021-07-09 16:55:07,936 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 [2021-07-09 16:55:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:55:08,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-09 16:55:08,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649366419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:08,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:08,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:55:08,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909920147] [2021-07-09 16:55:08,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:55:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:08,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:55:08,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:55:08,202 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) [2021-07-09 16:55:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:08,306 INFO L93 Difference]: Finished difference Result 2708 states and 5124 transitions. [2021-07-09 16:55:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:55:08,307 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 [2021-07-09 16:55:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:08,314 INFO L225 Difference]: With dead ends: 2708 [2021-07-09 16:55:08,314 INFO L226 Difference]: Without dead ends: 2708 [2021-07-09 16:55:08,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:55:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-07-09 16:55:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2468. [2021-07-09 16:55:08,349 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) [2021-07-09 16:55:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4680 transitions. [2021-07-09 16:55:08,354 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4680 transitions. Word has length 137 [2021-07-09 16:55:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:08,354 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 4680 transitions. [2021-07-09 16:55:08,354 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) [2021-07-09 16:55:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4680 transitions. [2021-07-09 16:55:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-07-09 16:55:08,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:08,360 INFO L508 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] [2021-07-09 16:55:08,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 16:55:08,569 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash -120582163, now seen corresponding path program 8 times [2021-07-09 16:55:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:08,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967506111] [2021-07-09 16:55:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-09 16:55:08,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:08,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967506111] [2021-07-09 16:55:08,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967506111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:08,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024490489] [2021-07-09 16:55:08,685 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 [2021-07-09 16:55:08,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:55:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:55:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-09 16:55:08,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024490489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:08,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:08,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:55:08,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437181580] [2021-07-09 16:55:08,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:55:08,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:55:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:55:08,945 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) [2021-07-09 16:55:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:09,077 INFO L93 Difference]: Finished difference Result 3052 states and 5776 transitions. [2021-07-09 16:55:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:55:09,078 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 [2021-07-09 16:55:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:09,086 INFO L225 Difference]: With dead ends: 3052 [2021-07-09 16:55:09,086 INFO L226 Difference]: Without dead ends: 3052 [2021-07-09 16:55:09,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:55:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-07-09 16:55:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2812. [2021-07-09 16:55:09,125 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) [2021-07-09 16:55:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 5332 transitions. [2021-07-09 16:55:09,131 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 5332 transitions. Word has length 145 [2021-07-09 16:55:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:09,131 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 5332 transitions. [2021-07-09 16:55:09,131 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) [2021-07-09 16:55:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 5332 transitions. [2021-07-09 16:55:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-07-09 16:55:09,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:09,136 INFO L508 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] [2021-07-09 16:55:09,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 16:55:09,346 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:09,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2132060766, now seen corresponding path program 9 times [2021-07-09 16:55:09,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:09,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013854066] [2021-07-09 16:55:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 175 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-07-09 16:55:09,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013854066] [2021-07-09 16:55:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013854066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109842831] [2021-07-09 16:55:09,485 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 [2021-07-09 16:55:09,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 16:55:09,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:55:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-07-09 16:55:09,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109842831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:09,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:09,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2021-07-09 16:55:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695069016] [2021-07-09 16:55:09,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 16:55:09,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 16:55:09,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:55:09,872 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) [2021-07-09 16:55:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:17,597 INFO L93 Difference]: Finished difference Result 4612 states and 8698 transitions. [2021-07-09 16:55:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2021-07-09 16:55:17,598 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 [2021-07-09 16:55:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:17,609 INFO L225 Difference]: With dead ends: 4612 [2021-07-09 16:55:17,610 INFO L226 Difference]: Without dead ends: 4612 [2021-07-09 16:55:17,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51908 ImplicationChecksByTransitivity, 7149.4ms TimeCoverageRelationStatistics Valid=21496, Invalid=89726, Unknown=0, NotChecked=0, Total=111222 [2021-07-09 16:55:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-07-09 16:55:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 3793. [2021-07-09 16:55:17,676 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) [2021-07-09 16:55:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 7186 transitions. [2021-07-09 16:55:17,683 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 7186 transitions. Word has length 153 [2021-07-09 16:55:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:17,683 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 7186 transitions. [2021-07-09 16:55:17,683 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) [2021-07-09 16:55:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 7186 transitions. [2021-07-09 16:55:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-07-09 16:55:17,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:17,689 INFO L508 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] [2021-07-09 16:55:17,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:17,905 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1107497405, now seen corresponding path program 10 times [2021-07-09 16:55:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:17,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143446303] [2021-07-09 16:55:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-09 16:55:18,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143446303] [2021-07-09 16:55:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143446303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979555835] [2021-07-09 16:55:18,047 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 [2021-07-09 16:55:18,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:55:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:55:18,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-09 16:55:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979555835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:18,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:18,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:55:18,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643762867] [2021-07-09 16:55:18,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:55:18,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:18,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:55:18,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:55:18,379 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) [2021-07-09 16:55:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:18,635 INFO L93 Difference]: Finished difference Result 4495 states and 8500 transitions. [2021-07-09 16:55:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:55:18,637 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 [2021-07-09 16:55:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:18,652 INFO L225 Difference]: With dead ends: 4495 [2021-07-09 16:55:18,652 INFO L226 Difference]: Without dead ends: 4495 [2021-07-09 16:55:18,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:55:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-07-09 16:55:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4207. [2021-07-09 16:55:18,701 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) [2021-07-09 16:55:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 7969 transitions. [2021-07-09 16:55:18,716 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 7969 transitions. Word has length 172 [2021-07-09 16:55:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:18,716 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 7969 transitions. [2021-07-09 16:55:18,717 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) [2021-07-09 16:55:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 7969 transitions. [2021-07-09 16:55:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-07-09 16:55:18,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:18,724 INFO L508 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] [2021-07-09 16:55:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:18,937 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 466543336, now seen corresponding path program 11 times [2021-07-09 16:55:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:18,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926108385] [2021-07-09 16:55:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-09 16:55:19,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:19,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926108385] [2021-07-09 16:55:19,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926108385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:19,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902959157] [2021-07-09 16:55:19,108 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 [2021-07-09 16:55:19,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:55:19,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:55:19,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-09 16:55:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902959157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:19,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:19,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:55:19,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588688315] [2021-07-09 16:55:19,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:55:19,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:55:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:55:19,390 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) [2021-07-09 16:55:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:19,668 INFO L93 Difference]: Finished difference Result 4909 states and 9283 transitions. [2021-07-09 16:55:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:55:19,673 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 [2021-07-09 16:55:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:19,679 INFO L225 Difference]: With dead ends: 4909 [2021-07-09 16:55:19,679 INFO L226 Difference]: Without dead ends: 4909 [2021-07-09 16:55:19,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:55:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2021-07-09 16:55:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 4621. [2021-07-09 16:55:19,725 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) [2021-07-09 16:55:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 8752 transitions. [2021-07-09 16:55:19,731 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 8752 transitions. Word has length 180 [2021-07-09 16:55:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:19,732 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 8752 transitions. [2021-07-09 16:55:19,732 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) [2021-07-09 16:55:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 8752 transitions. [2021-07-09 16:55:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-07-09 16:55:19,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:19,739 INFO L508 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] [2021-07-09 16:55:19,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 16:55:19,953 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1061660397, now seen corresponding path program 12 times [2021-07-09 16:55:19,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:19,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712247390] [2021-07-09 16:55:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 49 proven. 370 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-09 16:55:20,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:20,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712247390] [2021-07-09 16:55:20,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712247390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:20,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832483619] [2021-07-09 16:55:20,149 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 [2021-07-09 16:55:20,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:55:20,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:20,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:55:20,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-07-09 16:55:20,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832483619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:20,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:20,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-07-09 16:55:20,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826549396] [2021-07-09 16:55:20,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 16:55:20,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 16:55:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:55:20,620 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) [2021-07-09 16:55:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:39,563 INFO L93 Difference]: Finished difference Result 6911 states and 13026 transitions. [2021-07-09 16:55:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-07-09 16:55:39,563 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 [2021-07-09 16:55:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:39,573 INFO L225 Difference]: With dead ends: 6911 [2021-07-09 16:55:39,573 INFO L226 Difference]: Without dead ends: 6911 [2021-07-09 16:55:39,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151834 ImplicationChecksByTransitivity, 17718.6ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-07-09 16:55:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2021-07-09 16:55:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 5882. [2021-07-09 16:55:39,643 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) [2021-07-09 16:55:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 11130 transitions. [2021-07-09 16:55:39,653 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 11130 transitions. Word has length 188 [2021-07-09 16:55:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:39,653 INFO L482 AbstractCegarLoop]: Abstraction has 5882 states and 11130 transitions. [2021-07-09 16:55:39,654 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) [2021-07-09 16:55:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 11130 transitions. [2021-07-09 16:55:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-07-09 16:55:39,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:39,663 INFO L508 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] [2021-07-09 16:55:39,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:55:39,877 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1951609482, now seen corresponding path program 13 times [2021-07-09 16:55:39,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:39,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335664058] [2021-07-09 16:55:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-09 16:55:40,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:40,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335664058] [2021-07-09 16:55:40,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335664058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:40,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570838280] [2021-07-09 16:55:40,092 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 [2021-07-09 16:55:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:55:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-09 16:55:40,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570838280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:40,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:40,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-09 16:55:40,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607093857] [2021-07-09 16:55:40,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 16:55:40,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:40,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 16:55:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:55:40,459 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) [2021-07-09 16:55:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:40,812 INFO L93 Difference]: Finished difference Result 6702 states and 12662 transitions. [2021-07-09 16:55:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:55:40,812 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 [2021-07-09 16:55:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:40,823 INFO L225 Difference]: With dead ends: 6702 [2021-07-09 16:55:40,823 INFO L226 Difference]: Without dead ends: 6702 [2021-07-09 16:55:40,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:55:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2021-07-09 16:55:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 6366. [2021-07-09 16:55:40,951 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) [2021-07-09 16:55:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 12044 transitions. [2021-07-09 16:55:40,961 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 12044 transitions. Word has length 207 [2021-07-09 16:55:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:40,962 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 12044 transitions. [2021-07-09 16:55:40,962 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) [2021-07-09 16:55:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 12044 transitions. [2021-07-09 16:55:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-07-09 16:55:40,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:40,976 INFO L508 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] [2021-07-09 16:55:41,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 16:55:41,194 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash -375008149, now seen corresponding path program 14 times [2021-07-09 16:55:41,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:41,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344485403] [2021-07-09 16:55:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-09 16:55:41,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:41,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344485403] [2021-07-09 16:55:41,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344485403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:41,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332682325] [2021-07-09 16:55:41,430 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 [2021-07-09 16:55:41,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:55:41,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:55:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-09 16:55:41,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332682325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:41,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:41,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-09 16:55:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537515167] [2021-07-09 16:55:41,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 16:55:41,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 16:55:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:55:41,772 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) [2021-07-09 16:55:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:55:42,164 INFO L93 Difference]: Finished difference Result 7186 states and 13576 transitions. [2021-07-09 16:55:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:55:42,164 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 [2021-07-09 16:55:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:55:42,176 INFO L225 Difference]: With dead ends: 7186 [2021-07-09 16:55:42,176 INFO L226 Difference]: Without dead ends: 7186 [2021-07-09 16:55:42,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 16:55:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-07-09 16:55:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6850. [2021-07-09 16:55:42,254 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) [2021-07-09 16:55:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 12958 transitions. [2021-07-09 16:55:42,263 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 12958 transitions. Word has length 215 [2021-07-09 16:55:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:55:42,263 INFO L482 AbstractCegarLoop]: Abstraction has 6850 states and 12958 transitions. [2021-07-09 16:55:42,263 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) [2021-07-09 16:55:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 12958 transitions. [2021-07-09 16:55:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-07-09 16:55:42,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:55:42,278 INFO L508 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] [2021-07-09 16:55:42,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:55:42,495 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:55:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:55:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1095297440, now seen corresponding path program 15 times [2021-07-09 16:55:42,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:55:42,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220495677] [2021-07-09 16:55:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:55:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:55:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 61 proven. 637 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-07-09 16:55:42,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:55:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220495677] [2021-07-09 16:55:42,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220495677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537399251] [2021-07-09 16:55:42,858 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 [2021-07-09 16:55:42,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 16:55:42,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:55:42,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:55:42,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:55:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-07-09 16:55:43,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537399251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:55:43,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:55:43,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15] total 42 [2021-07-09 16:55:43,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511533162] [2021-07-09 16:55:43,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 16:55:43,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:55:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 16:55:43,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:55:43,433 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) [2021-07-09 16:56:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:56:23,226 INFO L93 Difference]: Finished difference Result 9630 states and 18140 transitions. [2021-07-09 16:56:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 821 states. [2021-07-09 16:56:23,226 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 [2021-07-09 16:56:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:56:23,237 INFO L225 Difference]: With dead ends: 9630 [2021-07-09 16:56:23,237 INFO L226 Difference]: Without dead ends: 9630 [2021-07-09 16:56:23,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 838 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349585 ImplicationChecksByTransitivity, 37636.0ms TimeCoverageRelationStatistics Valid=125901, Invalid=578859, Unknown=0, NotChecked=0, Total=704760 [2021-07-09 16:56:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2021-07-09 16:56:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 8391. [2021-07-09 16:56:23,345 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) [2021-07-09 16:56:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 15860 transitions. [2021-07-09 16:56:23,357 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 15860 transitions. Word has length 223 [2021-07-09 16:56:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:56:23,357 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 15860 transitions. [2021-07-09 16:56:23,357 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) [2021-07-09 16:56:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 15860 transitions. [2021-07-09 16:56:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-07-09 16:56:23,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:56:23,369 INFO L508 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] [2021-07-09 16:56:23,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 16:56:23,585 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:56:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:56:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1919014401, now seen corresponding path program 16 times [2021-07-09 16:56:23,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:56:23,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028691237] [2021-07-09 16:56:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:56:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-09 16:56:23,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:56:23,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028691237] [2021-07-09 16:56:23,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028691237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:23,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931734680] [2021-07-09 16:56:23,897 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 [2021-07-09 16:56:24,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:56:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:56:24,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 16:56:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:56:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-09 16:56:24,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931734680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:24,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:56:24,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-07-09 16:56:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882949157] [2021-07-09 16:56:24,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 16:56:24,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:56:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 16:56:24,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:56:24,290 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) [2021-07-09 16:56:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:56:24,829 INFO L93 Difference]: Finished difference Result 9329 states and 17610 transitions. [2021-07-09 16:56:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 16:56:24,830 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 [2021-07-09 16:56:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:56:24,841 INFO L225 Difference]: With dead ends: 9329 [2021-07-09 16:56:24,841 INFO L226 Difference]: Without dead ends: 9329 [2021-07-09 16:56:24,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 16:56:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-07-09 16:56:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 8945. [2021-07-09 16:56:25,075 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) [2021-07-09 16:56:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 16905 transitions. [2021-07-09 16:56:25,088 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 16905 transitions. Word has length 242 [2021-07-09 16:56:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:56:25,088 INFO L482 AbstractCegarLoop]: Abstraction has 8945 states and 16905 transitions. [2021-07-09 16:56:25,088 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) [2021-07-09 16:56:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 16905 transitions. [2021-07-09 16:56:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-07-09 16:56:25,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:56:25,101 INFO L508 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] [2021-07-09 16:56:25,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:56:25,305 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:56:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:56:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1596434710, now seen corresponding path program 17 times [2021-07-09 16:56:25,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:56:25,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089930704] [2021-07-09 16:56:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:56:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-09 16:56:25,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:56:25,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089930704] [2021-07-09 16:56:25,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089930704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994141633] [2021-07-09 16:56:25,642 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 [2021-07-09 16:56:25,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 16:56:25,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:56:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 16:56:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:56:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-09 16:56:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994141633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:26,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:56:26,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-09 16:56:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232206664] [2021-07-09 16:56:26,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 16:56:26,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:56:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 16:56:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:56:26,017 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) [2021-07-09 16:56:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:56:26,586 INFO L93 Difference]: Finished difference Result 9883 states and 18655 transitions. [2021-07-09 16:56:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 16:56:26,586 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 [2021-07-09 16:56:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:56:26,597 INFO L225 Difference]: With dead ends: 9883 [2021-07-09 16:56:26,597 INFO L226 Difference]: Without dead ends: 9883 [2021-07-09 16:56:26,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 16:56:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2021-07-09 16:56:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 9499. [2021-07-09 16:56:26,696 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) [2021-07-09 16:56:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 17950 transitions. [2021-07-09 16:56:26,709 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 17950 transitions. Word has length 250 [2021-07-09 16:56:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:56:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 17950 transitions. [2021-07-09 16:56:26,709 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) [2021-07-09 16:56:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 17950 transitions. [2021-07-09 16:56:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-07-09 16:56:26,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:56:26,721 INFO L508 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] [2021-07-09 16:56:26,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:56:26,937 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:56:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:56:26,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1208457003, now seen corresponding path program 18 times [2021-07-09 16:56:26,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:56:26,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887233230] [2021-07-09 16:56:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:56:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:56:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 73 proven. 976 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-07-09 16:56:27,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:56:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887233230] [2021-07-09 16:56:27,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887233230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154341903] [2021-07-09 16:56:27,395 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 [2021-07-09 16:56:27,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 16:56:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:56:27,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:56:27,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:56:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2021-07-09 16:56:28,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154341903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:56:28,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:56:28,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 50 [2021-07-09 16:56:28,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617415963] [2021-07-09 16:56:28,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 16:56:28,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:56:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 16:56:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 16:56:28,092 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) [2021-07-09 16:57:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:57:44,010 INFO L93 Difference]: Finished difference Result 12769 states and 24040 transitions. [2021-07-09 16:57:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1151 states. [2021-07-09 16:57:44,010 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 [2021-07-09 16:57:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:57:44,023 INFO L225 Difference]: With dead ends: 12769 [2021-07-09 16:57:44,023 INFO L226 Difference]: Without dead ends: 12769 [2021-07-09 16:57:44,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 1172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693207 ImplicationChecksByTransitivity, 71050.9ms TimeCoverageRelationStatistics Valid=240556, Invalid=1136546, Unknown=0, NotChecked=0, Total=1377102 [2021-07-09 16:57:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2021-07-09 16:57:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 11320. [2021-07-09 16:57:44,198 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) [2021-07-09 16:57:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 21376 transitions. [2021-07-09 16:57:44,212 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 21376 transitions. Word has length 258 [2021-07-09 16:57:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:57:44,212 INFO L482 AbstractCegarLoop]: Abstraction has 11320 states and 21376 transitions. [2021-07-09 16:57:44,213 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) [2021-07-09 16:57:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 21376 transitions. [2021-07-09 16:57:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-07-09 16:57:44,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:57:44,226 INFO L508 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] [2021-07-09 16:57:44,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:57:44,441 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:57:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:57:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash 99810484, now seen corresponding path program 19 times [2021-07-09 16:57:44,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:57:44,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540084757] [2021-07-09 16:57:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:57:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:57:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-09 16:57:44,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:57:44,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540084757] [2021-07-09 16:57:44,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540084757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:44,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593969785] [2021-07-09 16:57:44,874 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 [2021-07-09 16:57:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:57:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 16:57:44,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:57:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-09 16:57:45,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593969785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:45,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:57:45,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-07-09 16:57:45,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041955446] [2021-07-09 16:57:45,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 16:57:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:57:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 16:57:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:57:45,292 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) [2021-07-09 16:57:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:57:46,158 INFO L93 Difference]: Finished difference Result 12376 states and 23344 transitions. [2021-07-09 16:57:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 16:57:46,158 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 [2021-07-09 16:57:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:57:46,171 INFO L225 Difference]: With dead ends: 12376 [2021-07-09 16:57:46,171 INFO L226 Difference]: Without dead ends: 12376 [2021-07-09 16:57:46,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 857.3ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 16:57:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2021-07-09 16:57:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 11944. [2021-07-09 16:57:46,279 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) [2021-07-09 16:57:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11944 states to 11944 states and 22552 transitions. [2021-07-09 16:57:46,294 INFO L78 Accepts]: Start accepts. Automaton has 11944 states and 22552 transitions. Word has length 277 [2021-07-09 16:57:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:57:46,294 INFO L482 AbstractCegarLoop]: Abstraction has 11944 states and 22552 transitions. [2021-07-09 16:57:46,294 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) [2021-07-09 16:57:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 11944 states and 22552 transitions. [2021-07-09 16:57:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-07-09 16:57:46,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:57:46,307 INFO L508 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] [2021-07-09 16:57:46,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:57:46,508 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:57:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:57:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1815220201, now seen corresponding path program 20 times [2021-07-09 16:57:46,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:57:46,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629159717] [2021-07-09 16:57:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:57:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:57:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-09 16:57:46,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:57:46,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629159717] [2021-07-09 16:57:46,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629159717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:46,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319701459] [2021-07-09 16:57:46,954 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 [2021-07-09 16:57:47,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:57:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:57:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 16:57:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:57:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-09 16:57:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319701459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:47,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:57:47,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-07-09 16:57:47,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556695775] [2021-07-09 16:57:47,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 16:57:47,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:57:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 16:57:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:57:47,360 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) [2021-07-09 16:57:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:57:48,174 INFO L93 Difference]: Finished difference Result 13000 states and 24520 transitions. [2021-07-09 16:57:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 16:57:48,174 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 [2021-07-09 16:57:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:57:48,188 INFO L225 Difference]: With dead ends: 13000 [2021-07-09 16:57:48,188 INFO L226 Difference]: Without dead ends: 13000 [2021-07-09 16:57:48,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 929.3ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 16:57:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13000 states. [2021-07-09 16:57:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13000 to 12568. [2021-07-09 16:57:48,301 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) [2021-07-09 16:57:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 23728 transitions. [2021-07-09 16:57:48,316 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 23728 transitions. Word has length 285 [2021-07-09 16:57:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:57:48,316 INFO L482 AbstractCegarLoop]: Abstraction has 12568 states and 23728 transitions. [2021-07-09 16:57:48,317 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) [2021-07-09 16:57:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 23728 transitions. [2021-07-09 16:57:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:57:48,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:57:48,331 INFO L508 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] [2021-07-09 16:57:48,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 16:57:48,544 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:57:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:57:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -371646946, now seen corresponding path program 21 times [2021-07-09 16:57:48,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:57:48,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924609762] [2021-07-09 16:57:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:57:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:57:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 85 proven. 1387 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-07-09 16:57:49,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:57:49,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924609762] [2021-07-09 16:57:49,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924609762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:49,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719115985] [2021-07-09 16:57:49,203 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 [2021-07-09 16:57:49,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:57:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:57:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:57:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:57:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2021-07-09 16:57:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719115985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:57:49,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:57:49,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 19] total 58 [2021-07-09 16:57:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387960703] [2021-07-09 16:57:49,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-09 16:57:49,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:57:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-09 16:57:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 16:57:49,948 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) [2021-07-09 17:00:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:04,606 INFO L93 Difference]: Finished difference Result 15812 states and 29784 transitions. [2021-07-09 17:00:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1535 states. [2021-07-09 17:00:04,606 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 [2021-07-09 17:00:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:04,625 INFO L225 Difference]: With dead ends: 15812 [2021-07-09 17:00:04,626 INFO L226 Difference]: Without dead ends: 15812 [2021-07-09 17:00:04,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2413 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 1560 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240164 ImplicationChecksByTransitivity, 125963.6ms TimeCoverageRelationStatistics Valid=418764, Invalid=2019518, Unknown=0, NotChecked=0, Total=2438282 [2021-07-09 17:00:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15812 states. [2021-07-09 17:00:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15812 to 14669. [2021-07-09 17:00:04,909 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) [2021-07-09 17:00:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14669 states to 14669 states and 27678 transitions. [2021-07-09 17:00:04,930 INFO L78 Accepts]: Start accepts. Automaton has 14669 states and 27678 transitions. Word has length 293 [2021-07-09 17:00:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:04,930 INFO L482 AbstractCegarLoop]: Abstraction has 14669 states and 27678 transitions. [2021-07-09 17:00:04,931 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) [2021-07-09 17:00:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14669 states and 27678 transitions. [2021-07-09 17:00:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-07-09 17:00:04,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:04,952 INFO L508 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] [2021-07-09 17:00:05,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:00:05,321 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 120507201, now seen corresponding path program 22 times [2021-07-09 17:00:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:05,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192414873] [2021-07-09 17:00:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:05,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192414873] [2021-07-09 17:00:05,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192414873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983663589] [2021-07-09 17:00:05,501 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 [2021-07-09 17:00:05,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:00:05,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:05,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:00:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:06,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983663589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:06,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:06,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 17:00:06,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628935944] [2021-07-09 17:00:06,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:00:06,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:00:06,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:00:06,003 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) [2021-07-09 17:00:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:06,274 INFO L93 Difference]: Finished difference Result 17289 states and 32558 transitions. [2021-07-09 17:00:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:00:06,275 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 [2021-07-09 17:00:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:06,298 INFO L225 Difference]: With dead ends: 17289 [2021-07-09 17:00:06,298 INFO L226 Difference]: Without dead ends: 17289 [2021-07-09 17:00:06,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:00:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-07-09 17:00:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 16146. [2021-07-09 17:00:06,460 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) [2021-07-09 17:00:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 30452 transitions. [2021-07-09 17:00:06,483 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 30452 transitions. Word has length 312 [2021-07-09 17:00:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:06,484 INFO L482 AbstractCegarLoop]: Abstraction has 16146 states and 30452 transitions. [2021-07-09 17:00:06,484 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) [2021-07-09 17:00:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 30452 transitions. [2021-07-09 17:00:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-07-09 17:00:06,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:06,504 INFO L508 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] [2021-07-09 17:00:06,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:00:06,710 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1013905773, now seen corresponding path program 23 times [2021-07-09 17:00:06,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:06,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067151728] [2021-07-09 17:00:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:06,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:06,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067151728] [2021-07-09 17:00:06,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067151728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:06,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044484154] [2021-07-09 17:00:06,906 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 [2021-07-09 17:00:07,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-09 17:00:07,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:07,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:00:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:07,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044484154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:07,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:07,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-09 17:00:07,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062546218] [2021-07-09 17:00:07,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:00:07,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:00:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:00:07,436 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) [2021-07-09 17:00:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:07,751 INFO L93 Difference]: Finished difference Result 18766 states and 35332 transitions. [2021-07-09 17:00:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:00:07,751 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 [2021-07-09 17:00:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:07,775 INFO L225 Difference]: With dead ends: 18766 [2021-07-09 17:00:07,775 INFO L226 Difference]: Without dead ends: 18766 [2021-07-09 17:00:07,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:00:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18766 states. [2021-07-09 17:00:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18766 to 17623. [2021-07-09 17:00:08,117 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) [2021-07-09 17:00:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17623 states to 17623 states and 33226 transitions. [2021-07-09 17:00:08,141 INFO L78 Accepts]: Start accepts. Automaton has 17623 states and 33226 transitions. Word has length 323 [2021-07-09 17:00:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:08,141 INFO L482 AbstractCegarLoop]: Abstraction has 17623 states and 33226 transitions. [2021-07-09 17:00:08,141 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) [2021-07-09 17:00:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17623 states and 33226 transitions. [2021-07-09 17:00:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-07-09 17:00:08,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:08,162 INFO L508 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] [2021-07-09 17:00:08,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:00:08,362 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1039328257, now seen corresponding path program 24 times [2021-07-09 17:00:08,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:08,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803252745] [2021-07-09 17:00:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:08,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:08,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803252745] [2021-07-09 17:00:08,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803252745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:08,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84494578] [2021-07-09 17:00:08,603 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 [2021-07-09 17:00:08,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-07-09 17:00:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:00:08,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:09,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84494578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:09,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:09,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-09 17:00:09,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990041881] [2021-07-09 17:00:09,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:00:09,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:00:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:00:09,296 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) [2021-07-09 17:00:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:09,663 INFO L93 Difference]: Finished difference Result 20243 states and 38106 transitions. [2021-07-09 17:00:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:00:09,664 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 [2021-07-09 17:00:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:09,690 INFO L225 Difference]: With dead ends: 20243 [2021-07-09 17:00:09,691 INFO L226 Difference]: Without dead ends: 20243 [2021-07-09 17:00:09,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:00:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20243 states. [2021-07-09 17:00:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20243 to 19100. [2021-07-09 17:00:09,883 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) [2021-07-09 17:00:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19100 states to 19100 states and 36000 transitions. [2021-07-09 17:00:09,909 INFO L78 Accepts]: Start accepts. Automaton has 19100 states and 36000 transitions. Word has length 334 [2021-07-09 17:00:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:09,910 INFO L482 AbstractCegarLoop]: Abstraction has 19100 states and 36000 transitions. [2021-07-09 17:00:09,910 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) [2021-07-09 17:00:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19100 states and 36000 transitions. [2021-07-09 17:00:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-07-09 17:00:09,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:09,931 INFO L508 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] [2021-07-09 17:00:10,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:00:10,132 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash -687213101, now seen corresponding path program 25 times [2021-07-09 17:00:10,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:10,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269127870] [2021-07-09 17:00:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:10,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:10,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269127870] [2021-07-09 17:00:10,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269127870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:10,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061338725] [2021-07-09 17:00:10,373 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 [2021-07-09 17:00:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:10,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:00:10,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:10,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061338725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:10,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:10,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-09 17:00:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363650493] [2021-07-09 17:00:10,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:00:10,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:00:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:00:10,850 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) [2021-07-09 17:00:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:11,361 INFO L93 Difference]: Finished difference Result 21720 states and 40880 transitions. [2021-07-09 17:00:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:00:11,361 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 [2021-07-09 17:00:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:11,387 INFO L225 Difference]: With dead ends: 21720 [2021-07-09 17:00:11,387 INFO L226 Difference]: Without dead ends: 21720 [2021-07-09 17:00:11,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:00:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21720 states. [2021-07-09 17:00:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21720 to 20577. [2021-07-09 17:00:11,587 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) [2021-07-09 17:00:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20577 states to 20577 states and 38774 transitions. [2021-07-09 17:00:11,616 INFO L78 Accepts]: Start accepts. Automaton has 20577 states and 38774 transitions. Word has length 345 [2021-07-09 17:00:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:11,616 INFO L482 AbstractCegarLoop]: Abstraction has 20577 states and 38774 transitions. [2021-07-09 17:00:11,617 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) [2021-07-09 17:00:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 20577 states and 38774 transitions. [2021-07-09 17:00:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 17:00:11,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:11,639 INFO L508 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] [2021-07-09 17:00:11,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:00:11,840 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:11,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1790448447, now seen corresponding path program 26 times [2021-07-09 17:00:11,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:11,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262879198] [2021-07-09 17:00:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:12,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:12,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262879198] [2021-07-09 17:00:12,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262879198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:12,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622645257] [2021-07-09 17:00:12,141 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 [2021-07-09 17:00:12,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:00:12,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:12,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:00:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:12,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622645257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:12,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:12,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-07-09 17:00:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407054534] [2021-07-09 17:00:12,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:00:12,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:12,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:00:12,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:00:12,682 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) [2021-07-09 17:00:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:13,176 INFO L93 Difference]: Finished difference Result 23197 states and 43654 transitions. [2021-07-09 17:00:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:00:13,176 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 [2021-07-09 17:00:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:13,206 INFO L225 Difference]: With dead ends: 23197 [2021-07-09 17:00:13,206 INFO L226 Difference]: Without dead ends: 23197 [2021-07-09 17:00:13,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 542.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:00:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23197 states. [2021-07-09 17:00:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23197 to 22054. [2021-07-09 17:00:13,529 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) [2021-07-09 17:00:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 41548 transitions. [2021-07-09 17:00:13,560 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 41548 transitions. Word has length 356 [2021-07-09 17:00:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:13,561 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 41548 transitions. [2021-07-09 17:00:13,561 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) [2021-07-09 17:00:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 41548 transitions. [2021-07-09 17:00:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-07-09 17:00:13,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:13,586 INFO L508 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] [2021-07-09 17:00:13,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:00:13,793 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:13,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1526461715, now seen corresponding path program 27 times [2021-07-09 17:00:13,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:13,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707285673] [2021-07-09 17:00:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:14,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:14,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707285673] [2021-07-09 17:00:14,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707285673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:14,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091958399] [2021-07-09 17:00:14,120 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 [2021-07-09 17:00:14,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 17:00:14,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:00:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:14,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091958399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:14,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:14,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-07-09 17:00:14,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017409873] [2021-07-09 17:00:14,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 17:00:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 17:00:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:00:14,830 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) [2021-07-09 17:00:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:15,379 INFO L93 Difference]: Finished difference Result 24674 states and 46428 transitions. [2021-07-09 17:00:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:00:15,379 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 [2021-07-09 17:00:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:15,413 INFO L225 Difference]: With dead ends: 24674 [2021-07-09 17:00:15,414 INFO L226 Difference]: Without dead ends: 24674 [2021-07-09 17:00:15,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:00:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24674 states. [2021-07-09 17:00:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24674 to 23531. [2021-07-09 17:00:15,635 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) [2021-07-09 17:00:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23531 states to 23531 states and 44322 transitions. [2021-07-09 17:00:15,667 INFO L78 Accepts]: Start accepts. Automaton has 23531 states and 44322 transitions. Word has length 367 [2021-07-09 17:00:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:15,667 INFO L482 AbstractCegarLoop]: Abstraction has 23531 states and 44322 transitions. [2021-07-09 17:00:15,667 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) [2021-07-09 17:00:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 23531 states and 44322 transitions. [2021-07-09 17:00:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-07-09 17:00:15,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:15,775 INFO L508 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] [2021-07-09 17:00:15,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:00:15,976 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1059461759, now seen corresponding path program 28 times [2021-07-09 17:00:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:15,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146296188] [2021-07-09 17:00:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:16,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146296188] [2021-07-09 17:00:16,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146296188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:16,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618098965] [2021-07-09 17:00:16,386 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 [2021-07-09 17:00:16,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:00:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:00:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:16,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618098965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:16,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:16,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-07-09 17:00:16,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802872191] [2021-07-09 17:00:16,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 17:00:16,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 17:00:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:00:16,992 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) [2021-07-09 17:00:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:17,659 INFO L93 Difference]: Finished difference Result 26151 states and 49202 transitions. [2021-07-09 17:00:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:00:17,659 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 [2021-07-09 17:00:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:17,696 INFO L225 Difference]: With dead ends: 26151 [2021-07-09 17:00:17,697 INFO L226 Difference]: Without dead ends: 26151 [2021-07-09 17:00:17,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 17:00:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-07-09 17:00:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25008. [2021-07-09 17:00:17,961 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) [2021-07-09 17:00:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25008 states to 25008 states and 47096 transitions. [2021-07-09 17:00:18,000 INFO L78 Accepts]: Start accepts. Automaton has 25008 states and 47096 transitions. Word has length 378 [2021-07-09 17:00:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:18,000 INFO L482 AbstractCegarLoop]: Abstraction has 25008 states and 47096 transitions. [2021-07-09 17:00:18,000 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) [2021-07-09 17:00:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 25008 states and 47096 transitions. [2021-07-09 17:00:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-07-09 17:00:18,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:18,032 INFO L508 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] [2021-07-09 17:00:18,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:00:18,236 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash -667220909, now seen corresponding path program 29 times [2021-07-09 17:00:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:18,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468883247] [2021-07-09 17:00:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:18,593 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 17:00:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:18,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:18,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468883247] [2021-07-09 17:00:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468883247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871881142] [2021-07-09 17:00:18,848 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 [2021-07-09 17:00:19,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-09 17:00:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:00:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:19,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871881142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:19,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:19,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-07-09 17:00:19,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98901220] [2021-07-09 17:00:19,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 17:00:19,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:19,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 17:00:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:00:19,490 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) [2021-07-09 17:00:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:20,249 INFO L93 Difference]: Finished difference Result 27628 states and 51976 transitions. [2021-07-09 17:00:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:00:20,249 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 [2021-07-09 17:00:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:20,293 INFO L225 Difference]: With dead ends: 27628 [2021-07-09 17:00:20,293 INFO L226 Difference]: Without dead ends: 27628 [2021-07-09 17:00:20,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:00:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27628 states. [2021-07-09 17:00:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27628 to 26485. [2021-07-09 17:00:20,598 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) [2021-07-09 17:00:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26485 states to 26485 states and 49870 transitions. [2021-07-09 17:00:20,642 INFO L78 Accepts]: Start accepts. Automaton has 26485 states and 49870 transitions. Word has length 389 [2021-07-09 17:00:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:20,643 INFO L482 AbstractCegarLoop]: Abstraction has 26485 states and 49870 transitions. [2021-07-09 17:00:20,643 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) [2021-07-09 17:00:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26485 states and 49870 transitions. [2021-07-09 17:00:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-07-09 17:00:20,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:20,679 INFO L508 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] [2021-07-09 17:00:20,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:00:20,880 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash 726978113, now seen corresponding path program 30 times [2021-07-09 17:00:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:20,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925408030] [2021-07-09 17:00:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:21,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:21,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925408030] [2021-07-09 17:00:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925408030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:21,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144728691] [2021-07-09 17:00:21,487 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 [2021-07-09 17:00:21,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-09 17:00:21,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:00:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:22,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144728691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:22,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:22,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-07-09 17:00:22,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510978212] [2021-07-09 17:00:22,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 17:00:22,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:22,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 17:00:22,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:00:22,417 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) [2021-07-09 17:00:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:23,237 INFO L93 Difference]: Finished difference Result 29105 states and 54750 transitions. [2021-07-09 17:00:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:00:23,238 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 [2021-07-09 17:00:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:23,280 INFO L225 Difference]: With dead ends: 29105 [2021-07-09 17:00:23,280 INFO L226 Difference]: Without dead ends: 29105 [2021-07-09 17:00:23,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1032.1ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:00:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29105 states. [2021-07-09 17:00:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29105 to 27962. [2021-07-09 17:00:23,589 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) [2021-07-09 17:00:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27962 states to 27962 states and 52644 transitions. [2021-07-09 17:00:23,637 INFO L78 Accepts]: Start accepts. Automaton has 27962 states and 52644 transitions. Word has length 400 [2021-07-09 17:00:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:23,637 INFO L482 AbstractCegarLoop]: Abstraction has 27962 states and 52644 transitions. [2021-07-09 17:00:23,637 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) [2021-07-09 17:00:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27962 states and 52644 transitions. [2021-07-09 17:00:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-07-09 17:00:23,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:23,769 INFO L508 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] [2021-07-09 17:00:23,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:00:23,970 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:23,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1063574637, now seen corresponding path program 31 times [2021-07-09 17:00:23,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:23,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224039150] [2021-07-09 17:00:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:24,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224039150] [2021-07-09 17:00:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224039150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475236096] [2021-07-09 17:00:24,468 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 [2021-07-09 17:00:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:00:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:25,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475236096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:25,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:25,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-07-09 17:00:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544706897] [2021-07-09 17:00:25,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 17:00:25,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 17:00:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:00:25,066 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) [2021-07-09 17:00:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:25,922 INFO L93 Difference]: Finished difference Result 30582 states and 57524 transitions. [2021-07-09 17:00:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 17:00:25,922 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 [2021-07-09 17:00:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:25,964 INFO L225 Difference]: With dead ends: 30582 [2021-07-09 17:00:25,964 INFO L226 Difference]: Without dead ends: 30582 [2021-07-09 17:00:25,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 964.5ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 17:00:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30582 states. [2021-07-09 17:00:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30582 to 29439. [2021-07-09 17:00:26,315 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) [2021-07-09 17:00:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29439 states to 29439 states and 55418 transitions. [2021-07-09 17:00:26,361 INFO L78 Accepts]: Start accepts. Automaton has 29439 states and 55418 transitions. Word has length 411 [2021-07-09 17:00:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:26,361 INFO L482 AbstractCegarLoop]: Abstraction has 29439 states and 55418 transitions. [2021-07-09 17:00:26,361 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) [2021-07-09 17:00:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 29439 states and 55418 transitions. [2021-07-09 17:00:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-07-09 17:00:26,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:26,399 INFO L508 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] [2021-07-09 17:00:26,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:00:26,613 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1234917631, now seen corresponding path program 32 times [2021-07-09 17:00:26,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:26,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067559242] [2021-07-09 17:00:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:27,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067559242] [2021-07-09 17:00:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067559242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318779961] [2021-07-09 17:00:27,149 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 [2021-07-09 17:00:27,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:00:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:00:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-07-09 17:00:27,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318779961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:27,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:27,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-07-09 17:00:27,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327797441] [2021-07-09 17:00:27,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 17:00:27,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 17:00:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:00:27,724 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) [2021-07-09 17:00:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:28,738 INFO L93 Difference]: Finished difference Result 30916 states and 58192 transitions. [2021-07-09 17:00:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:00:28,738 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 [2021-07-09 17:00:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:28,778 INFO L225 Difference]: With dead ends: 30916 [2021-07-09 17:00:28,778 INFO L226 Difference]: Without dead ends: 30916 [2021-07-09 17:00:28,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1150.0ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 17:00:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30916 states. [2021-07-09 17:00:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30916 to 30916. [2021-07-09 17:00:29,093 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) [2021-07-09 17:00:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30916 states to 30916 states and 58192 transitions. [2021-07-09 17:00:29,140 INFO L78 Accepts]: Start accepts. Automaton has 30916 states and 58192 transitions. Word has length 422 [2021-07-09 17:00:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:29,140 INFO L482 AbstractCegarLoop]: Abstraction has 30916 states and 58192 transitions. [2021-07-09 17:00:29,141 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) [2021-07-09 17:00:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30916 states and 58192 transitions. [2021-07-09 17:00:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:00:29,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:29,177 INFO L508 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] [2021-07-09 17:00:29,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:00:29,378 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1359981869, now seen corresponding path program 33 times [2021-07-09 17:00:29,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:29,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053558732] [2021-07-09 17:00:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:00:31,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053558732] [2021-07-09 17:00:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053558732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597224310] [2021-07-09 17:00:31,469 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 [2021-07-09 17:00:32,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-07-09 17:00:32,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:00:32,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:00:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:00:32,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597224310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:32,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:00:32,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-07-09 17:00:32,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421835999] [2021-07-09 17:00:32,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-09 17:00:32,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:00:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-09 17:00:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:00:32,872 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) [2021-07-09 17:00:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:00:55,330 INFO L93 Difference]: Finished difference Result 150995 states and 288642 transitions. [2021-07-09 17:00:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-07-09 17:00:55,331 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 [2021-07-09 17:00:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:00:55,612 INFO L225 Difference]: With dead ends: 150995 [2021-07-09 17:00:55,612 INFO L226 Difference]: Without dead ends: 150983 [2021-07-09 17:00:55,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32634 ImplicationChecksByTransitivity, 9852.1ms TimeCoverageRelationStatistics Valid=1162, Invalid=102844, Unknown=0, NotChecked=0, Total=104006 [2021-07-09 17:00:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150983 states. [2021-07-09 17:00:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150983 to 32534. [2021-07-09 17:00:56,776 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) [2021-07-09 17:00:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32534 states to 32534 states and 61585 transitions. [2021-07-09 17:00:56,824 INFO L78 Accepts]: Start accepts. Automaton has 32534 states and 61585 transitions. Word has length 433 [2021-07-09 17:00:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:00:56,824 INFO L482 AbstractCegarLoop]: Abstraction has 32534 states and 61585 transitions. [2021-07-09 17:00:56,825 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) [2021-07-09 17:00:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32534 states and 61585 transitions. [2021-07-09 17:00:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:00:56,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:00:56,864 INFO L508 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] [2021-07-09 17:00:57,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:00:57,064 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:00:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:00:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 454116571, now seen corresponding path program 34 times [2021-07-09 17:00:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:00:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812022585] [2021-07-09 17:00:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:00:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:00:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:00:59,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:00:59,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812022585] [2021-07-09 17:00:59,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812022585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:00:59,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386153853] [2021-07-09 17:00:59,011 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 [2021-07-09 17:00:59,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:00:59,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:00:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:00:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:01:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:01:00,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386153853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:00,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:01:00,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-09 17:01:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068927063] [2021-07-09 17:01:00,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-09 17:01:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:01:00,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-09 17:01:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:01:00,346 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) [2021-07-09 17:01:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:01:24,678 INFO L93 Difference]: Finished difference Result 167871 states and 321305 transitions. [2021-07-09 17:01:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2021-07-09 17:01:24,679 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 [2021-07-09 17:01:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:01:24,984 INFO L225 Difference]: With dead ends: 167871 [2021-07-09 17:01:24,984 INFO L226 Difference]: Without dead ends: 167847 [2021-07-09 17:01:24,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38769 ImplicationChecksByTransitivity, 10381.1ms TimeCoverageRelationStatistics Valid=1265, Invalid=118797, Unknown=0, NotChecked=0, Total=120062 [2021-07-09 17:01:25,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167847 states. [2021-07-09 17:01:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167847 to 33952. [2021-07-09 17:01:26,187 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) [2021-07-09 17:01:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33952 states to 33952 states and 64258 transitions. [2021-07-09 17:01:26,239 INFO L78 Accepts]: Start accepts. Automaton has 33952 states and 64258 transitions. Word has length 433 [2021-07-09 17:01:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:01:26,239 INFO L482 AbstractCegarLoop]: Abstraction has 33952 states and 64258 transitions. [2021-07-09 17:01:26,239 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) [2021-07-09 17:01:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 33952 states and 64258 transitions. [2021-07-09 17:01:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:01:26,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:01:26,279 INFO L508 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] [2021-07-09 17:01:26,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:01:26,480 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:01:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:01:26,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1557636753, now seen corresponding path program 35 times [2021-07-09 17:01:26,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:01:26,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315864498] [2021-07-09 17:01:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:01:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:01:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:01:28,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:01:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315864498] [2021-07-09 17:01:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315864498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972499086] [2021-07-09 17:01:28,389 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 [2021-07-09 17:01:28,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-07-09 17:01:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:01:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:01:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:01:29,412 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 17:01:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:01:29,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972499086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:29,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:01:29,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-09 17:01:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318230124] [2021-07-09 17:01:29,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-09 17:01:29,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:01:29,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-09 17:01:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:01:29,549 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) [2021-07-09 17:01:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:01:52,401 INFO L93 Difference]: Finished difference Result 153419 states and 293523 transitions. [2021-07-09 17:01:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-07-09 17:01:52,412 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 [2021-07-09 17:01:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:01:52,732 INFO L225 Difference]: With dead ends: 153419 [2021-07-09 17:01:52,732 INFO L226 Difference]: Without dead ends: 153407 [2021-07-09 17:01:52,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33405 ImplicationChecksByTransitivity, 9766.6ms TimeCoverageRelationStatistics Valid=1176, Invalid=105426, Unknown=0, NotChecked=0, Total=106602 [2021-07-09 17:01:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153407 states. [2021-07-09 17:01:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153407 to 34047. [2021-07-09 17:01:53,951 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) [2021-07-09 17:01:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34047 states to 34047 states and 64439 transitions. [2021-07-09 17:01:54,004 INFO L78 Accepts]: Start accepts. Automaton has 34047 states and 64439 transitions. Word has length 433 [2021-07-09 17:01:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:01:54,004 INFO L482 AbstractCegarLoop]: Abstraction has 34047 states and 64439 transitions. [2021-07-09 17:01:54,004 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) [2021-07-09 17:01:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 34047 states and 64439 transitions. [2021-07-09 17:01:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:01:54,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:01:54,047 INFO L508 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] [2021-07-09 17:01:54,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:01:54,254 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:01:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:01:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1389996425, now seen corresponding path program 36 times [2021-07-09 17:01:54,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:01:54,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133572610] [2021-07-09 17:01:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:01:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:01:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:01:56,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:01:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133572610] [2021-07-09 17:01:56,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133572610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083878381] [2021-07-09 17:01:56,221 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 [2021-07-09 17:01:56,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-09 17:01:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:01:56,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:01:56,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:01:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:01:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083878381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:01:57,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:01:57,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-09 17:01:57,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660356581] [2021-07-09 17:01:57,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:01:57,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:01:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:01:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:01:57,352 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) [2021-07-09 17:02:10,566 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 17:02:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:02:24,348 INFO L93 Difference]: Finished difference Result 186974 states and 358074 transitions. [2021-07-09 17:02:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2021-07-09 17:02:24,348 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 [2021-07-09 17:02:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:02:24,699 INFO L225 Difference]: With dead ends: 186974 [2021-07-09 17:02:24,700 INFO L226 Difference]: Without dead ends: 186938 [2021-07-09 17:02:24,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45735 ImplicationChecksByTransitivity, 11430.3ms TimeCoverageRelationStatistics Valid=1372, Invalid=136640, Unknown=0, NotChecked=0, Total=138012 [2021-07-09 17:02:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186938 states. [2021-07-09 17:02:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186938 to 35280. [2021-07-09 17:02:25,896 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) [2021-07-09 17:02:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35280 states to 35280 states and 66748 transitions. [2021-07-09 17:02:25,947 INFO L78 Accepts]: Start accepts. Automaton has 35280 states and 66748 transitions. Word has length 433 [2021-07-09 17:02:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:02:25,947 INFO L482 AbstractCegarLoop]: Abstraction has 35280 states and 66748 transitions. [2021-07-09 17:02:25,948 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) [2021-07-09 17:02:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 35280 states and 66748 transitions. [2021-07-09 17:02:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:02:25,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:02:25,987 INFO L508 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] [2021-07-09 17:02:26,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 17:02:26,187 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:02:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:02:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash -816582073, now seen corresponding path program 37 times [2021-07-09 17:02:26,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:02:26,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325635495] [2021-07-09 17:02:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:02:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:02:27,447 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:02:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:02:28,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:02:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325635495] [2021-07-09 17:02:28,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325635495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:02:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59395498] [2021-07-09 17:02:28,546 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 [2021-07-09 17:02:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:02:28,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:02:28,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:02:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:02:29,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59395498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:02:29,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:02:29,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-09 17:02:29,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834015534] [2021-07-09 17:02:29,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-09 17:02:29,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:02:29,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-09 17:02:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:02:29,357 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) [2021-07-09 17:02:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:02:51,562 INFO L93 Difference]: Finished difference Result 154911 states and 296328 transitions. [2021-07-09 17:02:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-07-09 17:02:51,563 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 [2021-07-09 17:02:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:02:51,825 INFO L225 Difference]: With dead ends: 154911 [2021-07-09 17:02:51,826 INFO L226 Difference]: Without dead ends: 154899 [2021-07-09 17:02:51,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33664 ImplicationChecksByTransitivity, 10039.8ms TimeCoverageRelationStatistics Valid=1180, Invalid=106076, Unknown=0, NotChecked=0, Total=107256 [2021-07-09 17:02:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154899 states. [2021-07-09 17:02:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154899 to 35415. [2021-07-09 17:02:53,010 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) [2021-07-09 17:02:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35415 states to 35415 states and 67006 transitions. [2021-07-09 17:02:53,058 INFO L78 Accepts]: Start accepts. Automaton has 35415 states and 67006 transitions. Word has length 433 [2021-07-09 17:02:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:02:53,058 INFO L482 AbstractCegarLoop]: Abstraction has 35415 states and 67006 transitions. [2021-07-09 17:02:53,058 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) [2021-07-09 17:02:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35415 states and 67006 transitions. [2021-07-09 17:02:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:02:53,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:02:53,097 INFO L508 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] [2021-07-09 17:02:53,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 17:02:53,297 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:02:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:02:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash -984222401, now seen corresponding path program 38 times [2021-07-09 17:02:53,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:02:53,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698571266] [2021-07-09 17:02:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:02:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:02:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:02:55,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:02:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698571266] [2021-07-09 17:02:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698571266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:02:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338289337] [2021-07-09 17:02:55,398 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 [2021-07-09 17:02:55,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:02:55,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:02:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:02:55,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:02:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:02:56,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338289337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:02:56,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:02:56,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-09 17:02:56,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79993852] [2021-07-09 17:02:56,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:02:56,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:02:56,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:02:56,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:02:56,219 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) [2021-07-09 17:03:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:03:20,629 INFO L93 Difference]: Finished difference Result 171634 states and 328702 transitions. [2021-07-09 17:03:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2021-07-09 17:03:20,629 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 [2021-07-09 17:03:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:03:20,927 INFO L225 Difference]: With dead ends: 171634 [2021-07-09 17:03:20,927 INFO L226 Difference]: Without dead ends: 171610 [2021-07-09 17:03:20,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39609 ImplicationChecksByTransitivity, 10468.0ms TimeCoverageRelationStatistics Valid=1279, Invalid=121571, Unknown=0, NotChecked=0, Total=122850 [2021-07-09 17:03:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171610 states. [2021-07-09 17:03:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171610 to 35440. [2021-07-09 17:03:22,199 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) [2021-07-09 17:03:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35440 states to 35440 states and 67056 transitions. [2021-07-09 17:03:22,253 INFO L78 Accepts]: Start accepts. Automaton has 35440 states and 67056 transitions. Word has length 433 [2021-07-09 17:03:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:03:22,254 INFO L482 AbstractCegarLoop]: Abstraction has 35440 states and 67056 transitions. [2021-07-09 17:03:22,254 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) [2021-07-09 17:03:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 35440 states and 67056 transitions. [2021-07-09 17:03:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:03:22,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:03:22,297 INFO L508 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] [2021-07-09 17:03:22,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:03:22,498 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:03:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:03:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash -84178615, now seen corresponding path program 39 times [2021-07-09 17:03:22,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:03:22,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550618809] [2021-07-09 17:03:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:03:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:03:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:03:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:03:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550618809] [2021-07-09 17:03:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550618809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:03:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592559685] [2021-07-09 17:03:24,403 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 [2021-07-09 17:03:25,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-09 17:03:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:03:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:03:25,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:03:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:03:26,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592559685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:03:26,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:03:26,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-09 17:03:26,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538711518] [2021-07-09 17:03:26,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:03:26,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:03:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:03:26,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:03:26,076 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) [2021-07-09 17:03:50,829 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 17:03:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:03:50,949 INFO L93 Difference]: Finished difference Result 172437 states and 330220 transitions. [2021-07-09 17:03:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2021-07-09 17:03:50,949 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 [2021-07-09 17:03:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:03:51,253 INFO L225 Difference]: With dead ends: 172437 [2021-07-09 17:03:51,253 INFO L226 Difference]: Without dead ends: 172413 [2021-07-09 17:03:51,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40743 ImplicationChecksByTransitivity, 10715.1ms TimeCoverageRelationStatistics Valid=1295, Invalid=124375, Unknown=0, NotChecked=0, Total=125670 [2021-07-09 17:03:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172413 states. [2021-07-09 17:03:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172413 to 35755. [2021-07-09 17:03:52,321 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) [2021-07-09 17:03:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35755 states to 35755 states and 67653 transitions. [2021-07-09 17:03:52,370 INFO L78 Accepts]: Start accepts. Automaton has 35755 states and 67653 transitions. Word has length 433 [2021-07-09 17:03:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:03:52,370 INFO L482 AbstractCegarLoop]: Abstraction has 35755 states and 67653 transitions. [2021-07-09 17:03:52,371 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) [2021-07-09 17:03:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 35755 states and 67653 transitions. [2021-07-09 17:03:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:03:52,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:03:52,410 INFO L508 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] [2021-07-09 17:03:52,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:03:52,610 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:03:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:03:52,611 INFO L82 PathProgramCache]: Analyzing trace with hash -81940143, now seen corresponding path program 40 times [2021-07-09 17:03:52,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:03:52,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658165438] [2021-07-09 17:03:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:03:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:03:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:03:54,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:03:54,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658165438] [2021-07-09 17:03:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658165438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:03:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898150194] [2021-07-09 17:03:54,775 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 [2021-07-09 17:03:54,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:03:54,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:03:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:03:54,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:03:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:03:55,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898150194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:03:55,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:03:55,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-07-09 17:03:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623408914] [2021-07-09 17:03:55,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-09 17:03:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:03:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-09 17:03:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:03:55,634 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) [2021-07-09 17:04:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:04:24,001 INFO L93 Difference]: Finished difference Result 208203 states and 398901 transitions. [2021-07-09 17:04:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2021-07-09 17:04:24,002 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 [2021-07-09 17:04:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:04:24,424 INFO L225 Difference]: With dead ends: 208203 [2021-07-09 17:04:24,424 INFO L226 Difference]: Without dead ends: 208155 [2021-07-09 17:04:24,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53604 ImplicationChecksByTransitivity, 12235.6ms TimeCoverageRelationStatistics Valid=1483, Invalid=156523, Unknown=0, NotChecked=0, Total=158006 [2021-07-09 17:04:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208155 states. [2021-07-09 17:04:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208155 to 36602. [2021-07-09 17:04:25,872 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) [2021-07-09 17:04:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36602 states to 36602 states and 69232 transitions. [2021-07-09 17:04:25,922 INFO L78 Accepts]: Start accepts. Automaton has 36602 states and 69232 transitions. Word has length 433 [2021-07-09 17:04:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:04:25,923 INFO L482 AbstractCegarLoop]: Abstraction has 36602 states and 69232 transitions. [2021-07-09 17:04:25,923 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) [2021-07-09 17:04:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 36602 states and 69232 transitions. [2021-07-09 17:04:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:04:25,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:04:25,963 INFO L508 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] [2021-07-09 17:04:26,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:04:26,164 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:04:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:04:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2063345661, now seen corresponding path program 41 times [2021-07-09 17:04:26,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:04:26,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863766397] [2021-07-09 17:04:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:04:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:04:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:04:28,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:04:28,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863766397] [2021-07-09 17:04:28,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863766397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:04:28,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973715668] [2021-07-09 17:04:28,431 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 [2021-07-09 17:04:28,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-09 17:04:28,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:04:28,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:04:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:04:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:04:29,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973715668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:04:29,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:04:29,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-07-09 17:04:29,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385385180] [2021-07-09 17:04:29,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-09 17:04:29,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:04:29,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-09 17:04:29,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:04:29,341 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) [2021-07-09 17:04:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:04:51,770 INFO L93 Difference]: Finished difference Result 156403 states and 299133 transitions. [2021-07-09 17:04:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2021-07-09 17:04:51,770 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 [2021-07-09 17:04:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:04:52,033 INFO L225 Difference]: With dead ends: 156403 [2021-07-09 17:04:52,033 INFO L226 Difference]: Without dead ends: 156391 [2021-07-09 17:04:52,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33924 ImplicationChecksByTransitivity, 9925.8ms TimeCoverageRelationStatistics Valid=1184, Invalid=106728, Unknown=0, NotChecked=0, Total=107912 [2021-07-09 17:04:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156391 states. [2021-07-09 17:04:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156391 to 36777. [2021-07-09 17:04:53,136 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) [2021-07-09 17:04:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36777 states to 36777 states and 69567 transitions. [2021-07-09 17:04:53,187 INFO L78 Accepts]: Start accepts. Automaton has 36777 states and 69567 transitions. Word has length 433 [2021-07-09 17:04:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:04:53,188 INFO L482 AbstractCegarLoop]: Abstraction has 36777 states and 69567 transitions. [2021-07-09 17:04:53,188 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) [2021-07-09 17:04:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 36777 states and 69567 transitions. [2021-07-09 17:04:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:04:53,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:04:53,229 INFO L508 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] [2021-07-09 17:04:53,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:04:53,429 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:04:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:04:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1895705333, now seen corresponding path program 42 times [2021-07-09 17:04:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:04:53,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455562841] [2021-07-09 17:04:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:04:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:04:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:04:55,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:04:55,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455562841] [2021-07-09 17:04:55,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455562841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:04:55,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906923573] [2021-07-09 17:04:55,770 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 [2021-07-09 17:04:56,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-09 17:04:56,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:04:56,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:04:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:04:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:04:56,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906923573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:04:56,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:04:56,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-09 17:04:56,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994475673] [2021-07-09 17:04:56,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:04:56,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:04:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:04:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:04:56,889 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) [2021-07-09 17:05:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:05:21,675 INFO L93 Difference]: Finished difference Result 173126 states and 331507 transitions. [2021-07-09 17:05:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 345 states. [2021-07-09 17:05:21,676 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 [2021-07-09 17:05:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:05:21,987 INFO L225 Difference]: With dead ends: 173126 [2021-07-09 17:05:21,987 INFO L226 Difference]: Without dead ends: 173102 [2021-07-09 17:05:21,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39891 ImplicationChecksByTransitivity, 10849.2ms TimeCoverageRelationStatistics Valid=1283, Invalid=122269, Unknown=0, NotChecked=0, Total=123552 [2021-07-09 17:05:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173102 states. [2021-07-09 17:05:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173102 to 36842. [2021-07-09 17:05:23,328 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) [2021-07-09 17:05:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36842 states to 36842 states and 69694 transitions. [2021-07-09 17:05:23,381 INFO L78 Accepts]: Start accepts. Automaton has 36842 states and 69694 transitions. Word has length 433 [2021-07-09 17:05:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:05:23,381 INFO L482 AbstractCegarLoop]: Abstraction has 36842 states and 69694 transitions. [2021-07-09 17:05:23,381 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) [2021-07-09 17:05:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 36842 states and 69694 transitions. [2021-07-09 17:05:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:05:23,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:05:23,425 INFO L508 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] [2021-07-09 17:05:23,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:05:23,625 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:05:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:05:23,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1499218177, now seen corresponding path program 43 times [2021-07-09 17:05:23,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:05:23,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578428939] [2021-07-09 17:05:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:05:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:05:25,109 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:05:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:05:25,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:05:25,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578428939] [2021-07-09 17:05:25,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578428939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:05:25,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335514589] [2021-07-09 17:05:25,741 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 [2021-07-09 17:05:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:05:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:05:25,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:05:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:05:26,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335514589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:05:26,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:05:26,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-09 17:05:26,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588965633] [2021-07-09 17:05:26,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:05:26,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:05:26,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:05:26,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:05:26,523 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) [2021-07-09 17:05:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:05:49,308 INFO L93 Difference]: Finished difference Result 156843 states and 299985 transitions. [2021-07-09 17:05:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-07-09 17:05:49,309 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 [2021-07-09 17:05:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:05:49,584 INFO L225 Difference]: With dead ends: 156843 [2021-07-09 17:05:49,584 INFO L226 Difference]: Without dead ends: 156831 [2021-07-09 17:05:49,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34710 ImplicationChecksByTransitivity, 9717.2ms TimeCoverageRelationStatistics Valid=1198, Invalid=109358, Unknown=0, NotChecked=0, Total=110556 [2021-07-09 17:05:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156831 states. [2021-07-09 17:05:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156831 to 36937. [2021-07-09 17:05:50,767 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) [2021-07-09 17:05:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36937 states to 36937 states and 69875 transitions. [2021-07-09 17:05:50,821 INFO L78 Accepts]: Start accepts. Automaton has 36937 states and 69875 transitions. Word has length 433 [2021-07-09 17:05:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:05:50,822 INFO L482 AbstractCegarLoop]: Abstraction has 36937 states and 69875 transitions. [2021-07-09 17:05:50,822 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) [2021-07-09 17:05:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36937 states and 69875 transitions. [2021-07-09 17:05:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:05:50,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:05:50,866 INFO L508 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] [2021-07-09 17:05:51,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:05:51,066 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:05:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:05:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1496979705, now seen corresponding path program 44 times [2021-07-09 17:05:51,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:05:51,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103625435] [2021-07-09 17:05:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:05:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:05:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:05:53,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:05:53,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103625435] [2021-07-09 17:05:53,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103625435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:05:53,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430281735] [2021-07-09 17:05:53,033 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 [2021-07-09 17:05:53,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:05:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:05:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:05:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:05:53,746 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:05:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:05:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430281735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:05:54,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:05:54,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-07-09 17:05:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030088709] [2021-07-09 17:05:54,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-09 17:05:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:05:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-09 17:05:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:05:54,248 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) [2021-07-09 17:06:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:06:20,647 INFO L93 Difference]: Finished difference Result 192033 states and 367900 transitions. [2021-07-09 17:06:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 369 states. [2021-07-09 17:06:20,648 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 [2021-07-09 17:06:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:06:21,001 INFO L225 Difference]: With dead ends: 192033 [2021-07-09 17:06:21,001 INFO L226 Difference]: Without dead ends: 191997 [2021-07-09 17:06:21,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46647 ImplicationChecksByTransitivity, 11408.2ms TimeCoverageRelationStatistics Valid=1386, Invalid=139614, Unknown=0, NotChecked=0, Total=141000 [2021-07-09 17:06:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191997 states. [2021-07-09 17:06:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191997 to 36762. [2021-07-09 17:06:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36762 states, 36761 states have (on average 1.891678681211066) internal successors, (69540), 36761 states have internal predecessors, (69540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:06:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36762 states to 36762 states and 69540 transitions. [2021-07-09 17:06:22,390 INFO L78 Accepts]: Start accepts. Automaton has 36762 states and 69540 transitions. Word has length 433 [2021-07-09 17:06:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:06:22,390 INFO L482 AbstractCegarLoop]: Abstraction has 36762 states and 69540 transitions. [2021-07-09 17:06:22,390 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) [2021-07-09 17:06:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 36762 states and 69540 transitions. [2021-07-09 17:06:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:06:22,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:06:22,435 INFO L508 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] [2021-07-09 17:06:22,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:06:22,635 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:06:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:06:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1037981431, now seen corresponding path program 45 times [2021-07-09 17:06:22,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:06:22,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653046215] [2021-07-09 17:06:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:06:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:06:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:06:24,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:06:24,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653046215] [2021-07-09 17:06:24,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653046215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:06:24,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793589439] [2021-07-09 17:06:24,821 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:06:25,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-07-09 17:06:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:06:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:06:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:06:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:06:26,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793589439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:06:26,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:06:26,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-07-09 17:06:26,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12676112] [2021-07-09 17:06:26,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-09 17:06:26,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:06:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-09 17:06:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:06:26,065 INFO L87 Difference]: Start difference. First operand 36762 states and 69540 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) [2021-07-09 17:06:29,319 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 17:06:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:06:51,052 INFO L93 Difference]: Finished difference Result 174454 states and 334032 transitions. [2021-07-09 17:06:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 351 states. [2021-07-09 17:06:51,052 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 [2021-07-09 17:06:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:06:51,397 INFO L225 Difference]: With dead ends: 174454 [2021-07-09 17:06:51,397 INFO L226 Difference]: Without dead ends: 174430 [2021-07-09 17:06:51,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41604 ImplicationChecksByTransitivity, 11151.5ms TimeCoverageRelationStatistics Valid=1307, Invalid=126499, Unknown=0, NotChecked=0, Total=127806 [2021-07-09 17:06:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174430 states. [2021-07-09 17:06:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174430 to 37157. [2021-07-09 17:06:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37157 states, 37156 states have (on average 1.8917806007105178) internal successors, (70291), 37156 states have internal predecessors, (70291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:06:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37157 states to 37157 states and 70291 transitions. [2021-07-09 17:06:52,698 INFO L78 Accepts]: Start accepts. Automaton has 37157 states and 70291 transitions. Word has length 433 [2021-07-09 17:06:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:06:52,699 INFO L482 AbstractCegarLoop]: Abstraction has 37157 states and 70291 transitions. [2021-07-09 17:06:52,699 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) [2021-07-09 17:06:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37157 states and 70291 transitions. [2021-07-09 17:06:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-07-09 17:06:52,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:06:52,743 INFO L508 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] [2021-07-09 17:06:52,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:06:52,944 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 17:06:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:06:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1035742959, now seen corresponding path program 46 times [2021-07-09 17:06:52,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:06:52,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532399258] [2021-07-09 17:06:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:06:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:06:53,786 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:06:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:06:55,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:06:55,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532399258] [2021-07-09 17:06:55,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532399258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:06:55,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969101616] [2021-07-09 17:06:55,420 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:06:55,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:06:55,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:06:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-07-09 17:06:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:06:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:06:56,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969101616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:06:56,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:06:56,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-07-09 17:06:56,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409109294] [2021-07-09 17:06:56,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-09 17:06:56,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:06:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-09 17:06:56,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:06:56,275 INFO L87 Difference]: Start difference. First operand 37157 states and 70291 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... [2021-07-09 17:07:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 17:07:01,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 17:07:01,749 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:07:01,750 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:07:01,751 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:07:01,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:07:01 BasicIcfg [2021-07-09 17:07:01,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:07:01,752 INFO L168 Benchmark]: Toolchain (without parser) took 721895.01 ms. Allocated memory was 191.9 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 153.8 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-09 17:07:01,752 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 191.9 MB. Free memory is still 172.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:07:01,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.51 ms. Allocated memory is still 191.9 MB. Free memory was 153.6 MB in the beginning and 147.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:07:01,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.09 ms. Allocated memory is still 191.9 MB. Free memory was 147.9 MB in the beginning and 145.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:07:01,752 INFO L168 Benchmark]: Boogie Preprocessor took 17.05 ms. Allocated memory is still 191.9 MB. Free memory was 145.3 MB in the beginning and 143.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:07:01,752 INFO L168 Benchmark]: RCFGBuilder took 358.67 ms. Allocated memory is still 191.9 MB. Free memory was 143.2 MB in the beginning and 117.0 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-07-09 17:07:01,753 INFO L168 Benchmark]: TraceAbstraction took 720990.64 ms. Allocated memory was 191.9 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 116.5 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-09 17:07:01,753 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 191.9 MB. Free memory is still 172.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 493.51 ms. Allocated memory is still 191.9 MB. Free memory was 153.6 MB in the beginning and 147.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.09 ms. Allocated memory is still 191.9 MB. Free memory was 147.9 MB in the beginning and 145.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.05 ms. Allocated memory is still 191.9 MB. Free memory was 145.3 MB in the beginning and 143.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.67 ms. Allocated memory is still 191.9 MB. Free memory was 143.2 MB in the beginning and 117.0 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 720990.64 ms. Allocated memory was 191.9 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 116.5 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (37157states) and FLOYD_HOARE automaton (currently 75 states, 72 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 120 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 720926.8ms, OverallIterations: 49, TraceHistogramMax: 20, EmptinessCheckTime: 1220.0ms, AutomataDifference: 618920.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 64735 SDtfs, 203906 SDslu, 4005257 SDs, 0 SdLazy, 601480 SolverSat, 13220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 155522.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26484 GetRequests, 15986 SyntacticMatches, 28 SemanticMatches, 10469 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3027594 ImplicationChecksByTransitivity, 415825.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37157occurred in iteration=48, InterpolantAutomatonStates: 9928, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21679.7ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1777727 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1458.9ms SsaConstructionTime, 7134.0ms SatisfiabilityAnalysisTime, 58095.2ms InterpolantComputationTime, 27948 NumberOfCodeBlocks, 27347 NumberOfCodeBlocksAsserted, 447 NumberOfCheckSat, 27853 ConstructedInterpolants, 0 QuantifiedInterpolants, 115313 SizeOfPredicates, 1208 NumberOfNonLiveVariables, 26804 ConjunctsInSsa, 2994 ConjunctsInUnsatCore, 95 InterpolantComputations, 4 PerfectInterpolantSequences, 41720/183969 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