/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 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 17:55:19,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 17:55:19,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 17:55:19,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 17:55:19,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 17:55:19,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 17:55:19,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 17:55:19,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 17:55:19,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 17:55:19,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 17:55:19,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 17:55:19,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 17:55:19,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 17:55:19,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 17:55:19,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 17:55:19,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 17:55:19,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 17:55:19,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 17:55:19,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 17:55:19,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 17:55:19,504 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 [2021-08-12 17:55:19,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 17:55:19,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 17:55:19,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 17:55:19,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 17:55:19,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 17:55:19,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 17:55:19,548 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 17:55:19,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 17:55:19,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 17:55:19,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 17:55:19,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 17:55:19,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 17:55:19,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 17:55:19,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 17:55:19,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 17:55:19,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 17:55:19,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 17:55:19,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 17:55:19,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 17:55:19,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 17:55:19,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 17:55:19,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 17:55:19,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 17:55:19,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 17:55:19,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 17:55:19,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 17:55:19,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 17:55:19,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 17:55:19,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 17:55:19,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 17:55:19,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 17:55:19,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 17:55:19,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 17:55:19,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 17:55:19,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-12 17:55:19,886 INFO L275 PluginConnector]: CDTParser initialized [2021-08-12 17:55:19,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-08-12 17:55:19,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e71fbff/fde2655517be44d8b309f07142760e25/FLAG2ff64939e [2021-08-12 17:55:20,537 INFO L306 CDTParser]: Found 1 translation units. [2021-08-12 17:55:20,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-08-12 17:55:20,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e71fbff/fde2655517be44d8b309f07142760e25/FLAG2ff64939e [2021-08-12 17:55:20,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e71fbff/fde2655517be44d8b309f07142760e25 [2021-08-12 17:55:20,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 17:55:20,959 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-12 17:55:20,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-12 17:55:20,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-12 17:55:20,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-12 17:55:20,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 05:55:20" (1/1) ... [2021-08-12 17:55:20,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2109e6c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:20, skipping insertion in model container [2021-08-12 17:55:20,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 05:55:20" (1/1) ... [2021-08-12 17:55:20,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-12 17:55:21,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-12 17:55:21,160 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] [2021-08-12 17:55:21,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 17:55:21,598 INFO L203 MainTranslator]: Completed pre-run [2021-08-12 17:55:21,610 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] [2021-08-12 17:55:21,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 17:55:21,816 INFO L208 MainTranslator]: Completed translation [2021-08-12 17:55:21,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21 WrapperNode [2021-08-12 17:55:21,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-12 17:55:21,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 17:55:21,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 17:55:21,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 17:55:21,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 17:55:21,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 17:55:21,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 17:55:21,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 17:55:21,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... [2021-08-12 17:55:21,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 17:55:21,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 17:55:21,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 17:55:21,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 17:55:21,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 17:55:21,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-12 17:55:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-12 17:55:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-12 17:55:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-12 17:55:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-08-12 17:55:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-08-12 17:55:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-08-12 17:55:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-12 17:55:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 17:55:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 17:55:21,977 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 17:55:22,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 17:55:22,450 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-12 17:55:22,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 05:55:22 BoogieIcfgContainer [2021-08-12 17:55:22,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 17:55:22,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 17:55:22,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 17:55:22,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 17:55:22,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.08 05:55:20" (1/3) ... [2021-08-12 17:55:22,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9dd722f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 05:55:22, skipping insertion in model container [2021-08-12 17:55:22,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 05:55:21" (2/3) ... [2021-08-12 17:55:22,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9dd722f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 05:55:22, skipping insertion in model container [2021-08-12 17:55:22,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 05:55:22" (3/3) ... [2021-08-12 17:55:22,458 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-08-12 17:55:22,463 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 17:55:22,464 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 17:55:22,464 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 17:55:22,499 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,499 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,499 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,499 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,499 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,500 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,500 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,500 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,500 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,500 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,500 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,501 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,502 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,502 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,502 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,502 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,503 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,504 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,504 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,504 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,504 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,504 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,505 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,505 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,505 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,506 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,507 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,507 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,509 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,509 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,509 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,509 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,510 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,510 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,510 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,510 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,511 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 17:55:22,519 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-08-12 17:55:22,538 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-12 17:55:22,564 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 17:55:22,564 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 17:55:22,564 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 17:55:22,565 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 17:55:22,565 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 17:55:22,565 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 17:55:22,565 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 17:55:22,565 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 17:55:22,580 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 90 transitions, 188 flow [2021-08-12 17:55:22,618 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.028328611898017) internal successors, (716), 354 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 17:55:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.028328611898017) internal successors, (716), 354 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 17:55:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-12 17:55:22,634 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:22,635 INFO L550 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] [2021-08-12 17:55:22,636 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1593361763, now seen corresponding path program 1 times [2021-08-12 17:55:22,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:22,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855650909] [2021-08-12 17:55:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:22,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:22,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855650909] [2021-08-12 17:55:22,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855650909] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 17:55:22,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 17:55:22,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 17:55:22,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000465461] [2021-08-12 17:55:22,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-08-12 17:55:22,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-12 17:55:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-12 17:55:22,857 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.028328611898017) internal successors, (716), 354 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 17:55:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:22,906 INFO L93 Difference]: Finished difference Result 580 states and 1186 transitions. [2021-08-12 17:55:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-12 17:55:22,908 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 [2021-08-12 17:55:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:22,919 INFO L225 Difference]: With dead ends: 580 [2021-08-12 17:55:22,920 INFO L226 Difference]: Without dead ends: 292 [2021-08-12 17:55:22,923 INFO L806 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 [2021-08-12 17:55:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-12 17:55:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-08-12 17:55:22,968 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) [2021-08-12 17:55:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 544 transitions. [2021-08-12 17:55:22,972 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 544 transitions. Word has length 53 [2021-08-12 17:55:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:22,973 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 544 transitions. [2021-08-12 17:55:22,973 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) [2021-08-12 17:55:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 544 transitions. [2021-08-12 17:55:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-12 17:55:22,976 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:22,976 INFO L550 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] [2021-08-12 17:55:22,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 17:55:22,977 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash -436565571, now seen corresponding path program 1 times [2021-08-12 17:55:22,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:22,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970062518] [2021-08-12 17:55:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:23,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:23,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970062518] [2021-08-12 17:55:23,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970062518] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 17:55:23,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 17:55:23,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 17:55:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716557081] [2021-08-12 17:55:23,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 17:55:23,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:23,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 17:55:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 17:55:23,091 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) [2021-08-12 17:55:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:23,167 INFO L93 Difference]: Finished difference Result 482 states and 916 transitions. [2021-08-12 17:55:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 17:55:23,172 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 [2021-08-12 17:55:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:23,176 INFO L225 Difference]: With dead ends: 482 [2021-08-12 17:55:23,176 INFO L226 Difference]: Without dead ends: 432 [2021-08-12 17:55:23,177 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 17:55:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-12 17:55:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 306. [2021-08-12 17:55:23,213 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) [2021-08-12 17:55:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 572 transitions. [2021-08-12 17:55:23,215 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 572 transitions. Word has length 53 [2021-08-12 17:55:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:23,216 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 572 transitions. [2021-08-12 17:55:23,216 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) [2021-08-12 17:55:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 572 transitions. [2021-08-12 17:55:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-12 17:55:23,218 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:23,219 INFO L550 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] [2021-08-12 17:55:23,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 17:55:23,219 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1947629737, now seen corresponding path program 1 times [2021-08-12 17:55:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:23,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205470760] [2021-08-12 17:55:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:23,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205470760] [2021-08-12 17:55:23,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205470760] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 17:55:23,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 17:55:23,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 17:55:23,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929003004] [2021-08-12 17:55:23,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 17:55:23,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 17:55:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 17:55:23,336 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) [2021-08-12 17:55:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:23,382 INFO L93 Difference]: Finished difference Result 485 states and 922 transitions. [2021-08-12 17:55:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 17:55:23,385 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 [2021-08-12 17:55:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:23,388 INFO L225 Difference]: With dead ends: 485 [2021-08-12 17:55:23,388 INFO L226 Difference]: Without dead ends: 439 [2021-08-12 17:55:23,392 INFO L806 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 [2021-08-12 17:55:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-12 17:55:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 325. [2021-08-12 17:55:23,414 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) [2021-08-12 17:55:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 610 transitions. [2021-08-12 17:55:23,416 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 610 transitions. Word has length 64 [2021-08-12 17:55:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:23,424 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 610 transitions. [2021-08-12 17:55:23,424 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) [2021-08-12 17:55:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 610 transitions. [2021-08-12 17:55:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-12 17:55:23,431 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:23,431 INFO L550 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] [2021-08-12 17:55:23,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 17:55:23,432 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash 673821708, now seen corresponding path program 1 times [2021-08-12 17:55:23,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:23,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282017755] [2021-08-12 17:55:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:23,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:23,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282017755] [2021-08-12 17:55:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282017755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789971801] [2021-08-12 17:55:23,518 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 [2021-08-12 17:55:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:23,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-12 17:55:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:23,777 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 [2021-08-12 17:55:23,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 17:55:23,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 17:55:23,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-08-12 17:55:23,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-08-12 17:55:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:23,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789971801] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 17:55:23,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 17:55:23,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-12 17:55:23,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029401481] [2021-08-12 17:55:23,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 17:55:23,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 17:55:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 17:55:23,927 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) [2021-08-12 17:55:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:24,011 INFO L93 Difference]: Finished difference Result 455 states and 862 transitions. [2021-08-12 17:55:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 17:55:24,014 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 [2021-08-12 17:55:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:24,016 INFO L225 Difference]: With dead ends: 455 [2021-08-12 17:55:24,016 INFO L226 Difference]: Without dead ends: 307 [2021-08-12 17:55:24,017 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 17:55:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-12 17:55:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-08-12 17:55:24,035 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) [2021-08-12 17:55:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 565 transitions. [2021-08-12 17:55:24,037 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 565 transitions. Word has length 72 [2021-08-12 17:55:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:24,037 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 565 transitions. [2021-08-12 17:55:24,038 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) [2021-08-12 17:55:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 565 transitions. [2021-08-12 17:55:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-12 17:55:24,039 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:24,039 INFO L550 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] [2021-08-12 17:55:24,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:24,261 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1055514508, now seen corresponding path program 2 times [2021-08-12 17:55:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:24,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780477972] [2021-08-12 17:55:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780477972] [2021-08-12 17:55:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780477972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:24,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523660165] [2021-08-12 17:55:24,348 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 [2021-08-12 17:55:24,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 17:55:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 17:55:24,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 17:55:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523660165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:24,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:24,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 17:55:24,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108864573] [2021-08-12 17:55:24,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 17:55:24,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 17:55:24,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 17:55:24,680 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) [2021-08-12 17:55:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:25,076 INFO L93 Difference]: Finished difference Result 1094 states and 2098 transitions. [2021-08-12 17:55:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 17:55:25,077 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 [2021-08-12 17:55:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:25,082 INFO L225 Difference]: With dead ends: 1094 [2021-08-12 17:55:25,082 INFO L226 Difference]: Without dead ends: 1009 [2021-08-12 17:55:25,084 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-08-12 17:55:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-12 17:55:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 658. [2021-08-12 17:55:25,129 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) [2021-08-12 17:55:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1240 transitions. [2021-08-12 17:55:25,133 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1240 transitions. Word has length 72 [2021-08-12 17:55:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:25,133 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 1240 transitions. [2021-08-12 17:55:25,133 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) [2021-08-12 17:55:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1240 transitions. [2021-08-12 17:55:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-12 17:55:25,135 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:25,135 INFO L550 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] [2021-08-12 17:55:25,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:25,360 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 881659993, now seen corresponding path program 3 times [2021-08-12 17:55:25,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:25,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070375057] [2021-08-12 17:55:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 17:55:25,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070375057] [2021-08-12 17:55:25,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070375057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547718958] [2021-08-12 17:55:25,485 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 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 [2021-08-12 17:55:25,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 17:55:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 17:55:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-12 17:55:25,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547718958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:25,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:25,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 17:55:25,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596214975] [2021-08-12 17:55:25,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 17:55:25,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 17:55:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 17:55:25,769 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) [2021-08-12 17:55:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:25,878 INFO L93 Difference]: Finished difference Result 1123 states and 2126 transitions. [2021-08-12 17:55:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 17:55:25,879 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 [2021-08-12 17:55:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:25,886 INFO L225 Difference]: With dead ends: 1123 [2021-08-12 17:55:25,886 INFO L226 Difference]: Without dead ends: 1046 [2021-08-12 17:55:25,887 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 17:55:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-08-12 17:55:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 875. [2021-08-12 17:55:25,912 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) [2021-08-12 17:55:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1656 transitions. [2021-08-12 17:55:25,917 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1656 transitions. Word has length 91 [2021-08-12 17:55:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:25,918 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1656 transitions. [2021-08-12 17:55:25,918 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) [2021-08-12 17:55:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1656 transitions. [2021-08-12 17:55:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-12 17:55:25,921 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:25,921 INFO L550 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] [2021-08-12 17:55:26,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:26,129 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash -911400325, now seen corresponding path program 4 times [2021-08-12 17:55:26,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:26,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508623004] [2021-08-12 17:55:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-12 17:55:26,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:26,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508623004] [2021-08-12 17:55:26,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508623004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115303213] [2021-08-12 17:55:26,237 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 [2021-08-12 17:55:26,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 17:55:26,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 17:55:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-12 17:55:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115303213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:26,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:26,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 17:55:26,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781451949] [2021-08-12 17:55:26,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 17:55:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:26,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 17:55:26,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 17:55:26,564 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) [2021-08-12 17:55:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:26,683 INFO L93 Difference]: Finished difference Result 1431 states and 2706 transitions. [2021-08-12 17:55:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 17:55:26,684 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 [2021-08-12 17:55:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:26,691 INFO L225 Difference]: With dead ends: 1431 [2021-08-12 17:55:26,691 INFO L226 Difference]: Without dead ends: 1341 [2021-08-12 17:55:26,692 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-12 17:55:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-08-12 17:55:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1149. [2021-08-12 17:55:26,725 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) [2021-08-12 17:55:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 2177 transitions. [2021-08-12 17:55:26,731 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 2177 transitions. Word has length 102 [2021-08-12 17:55:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:26,731 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 2177 transitions. [2021-08-12 17:55:26,731 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) [2021-08-12 17:55:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 2177 transitions. [2021-08-12 17:55:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 17:55:26,735 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:26,736 INFO L550 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] [2021-08-12 17:55:26,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:26,961 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1460877338, now seen corresponding path program 5 times [2021-08-12 17:55:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:26,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003999909] [2021-08-12 17:55:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-12 17:55:27,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003999909] [2021-08-12 17:55:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003999909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963330712] [2021-08-12 17:55:27,043 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 [2021-08-12 17:55:27,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 17:55:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 17:55:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-12 17:55:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963330712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:27,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:27,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-12 17:55:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802685790] [2021-08-12 17:55:27,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 17:55:27,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 17:55:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-12 17:55:27,333 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) [2021-08-12 17:55:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:27,482 INFO L93 Difference]: Finished difference Result 1705 states and 3227 transitions. [2021-08-12 17:55:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 17:55:27,483 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 [2021-08-12 17:55:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:27,491 INFO L225 Difference]: With dead ends: 1705 [2021-08-12 17:55:27,491 INFO L226 Difference]: Without dead ends: 1615 [2021-08-12 17:55:27,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-12 17:55:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-08-12 17:55:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1423. [2021-08-12 17:55:27,532 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) [2021-08-12 17:55:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 2698 transitions. [2021-08-12 17:55:27,540 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 2698 transitions. Word has length 110 [2021-08-12 17:55:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:27,540 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 2698 transitions. [2021-08-12 17:55:27,540 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) [2021-08-12 17:55:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 2698 transitions. [2021-08-12 17:55:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-12 17:55:27,544 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:27,544 INFO L550 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] [2021-08-12 17:55:27,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:27,757 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:27,757 INFO L82 PathProgramCache]: Analyzing trace with hash -313404847, now seen corresponding path program 6 times [2021-08-12 17:55:27,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:27,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299790977] [2021-08-12 17:55:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-12 17:55:27,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299790977] [2021-08-12 17:55:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299790977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:27,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203592701] [2021-08-12 17:55:27,866 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 [2021-08-12 17:55:28,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 17:55:28,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:28,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 17:55:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-08-12 17:55:28,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203592701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:28,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:28,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 17:55:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220272557] [2021-08-12 17:55:28,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 17:55:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 17:55:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 17:55:28,320 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) [2021-08-12 17:55:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:31,382 INFO L93 Difference]: Finished difference Result 2934 states and 5589 transitions. [2021-08-12 17:55:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-08-12 17:55:31,382 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 [2021-08-12 17:55:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:31,394 INFO L225 Difference]: With dead ends: 2934 [2021-08-12 17:55:31,394 INFO L226 Difference]: Without dead ends: 2733 [2021-08-12 17:55:31,402 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11215 ImplicationChecksByTransitivity, 2613.8ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-08-12 17:55:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-08-12 17:55:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2124. [2021-08-12 17:55:31,466 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) [2021-08-12 17:55:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 4028 transitions. [2021-08-12 17:55:31,477 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 4028 transitions. Word has length 118 [2021-08-12 17:55:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:31,478 INFO L482 AbstractCegarLoop]: Abstraction has 2124 states and 4028 transitions. [2021-08-12 17:55:31,478 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) [2021-08-12 17:55:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 4028 transitions. [2021-08-12 17:55:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-08-12 17:55:31,483 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:31,483 INFO L550 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] [2021-08-12 17:55:31,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:31,697 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 44909880, now seen corresponding path program 7 times [2021-08-12 17:55:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:31,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874940016] [2021-08-12 17:55:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-12 17:55:31,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:31,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874940016] [2021-08-12 17:55:31,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874940016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:31,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408661957] [2021-08-12 17:55:31,832 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 [2021-08-12 17:55:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:31,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 17:55:31,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 85 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-12 17:55:32,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408661957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:32,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:32,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 17:55:32,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685520088] [2021-08-12 17:55:32,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 17:55:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 17:55:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 17:55:32,144 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) [2021-08-12 17:55:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:32,432 INFO L93 Difference]: Finished difference Result 2820 states and 5340 transitions. [2021-08-12 17:55:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 17:55:32,432 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 [2021-08-12 17:55:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:32,446 INFO L225 Difference]: With dead ends: 2820 [2021-08-12 17:55:32,446 INFO L226 Difference]: Without dead ends: 2708 [2021-08-12 17:55:32,448 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-08-12 17:55:32,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-08-12 17:55:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2468. [2021-08-12 17:55:32,520 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) [2021-08-12 17:55:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4680 transitions. [2021-08-12 17:55:32,532 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4680 transitions. Word has length 137 [2021-08-12 17:55:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:32,533 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 4680 transitions. [2021-08-12 17:55:32,533 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) [2021-08-12 17:55:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4680 transitions. [2021-08-12 17:55:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-12 17:55:32,539 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:32,539 INFO L550 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] [2021-08-12 17:55:32,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 17:55:32,764 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash -120582163, now seen corresponding path program 8 times [2021-08-12 17:55:32,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:32,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275624294] [2021-08-12 17:55:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-12 17:55:32,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:32,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275624294] [2021-08-12 17:55:32,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275624294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039117440] [2021-08-12 17:55:32,918 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 [2021-08-12 17:55:33,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 17:55:33,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 17:55:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-12 17:55:33,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039117440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:33,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:33,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 17:55:33,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315736221] [2021-08-12 17:55:33,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 17:55:33,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 17:55:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-12 17:55:33,277 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) [2021-08-12 17:55:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:33,595 INFO L93 Difference]: Finished difference Result 3164 states and 5992 transitions. [2021-08-12 17:55:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 17:55:33,596 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 [2021-08-12 17:55:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:33,617 INFO L225 Difference]: With dead ends: 3164 [2021-08-12 17:55:33,617 INFO L226 Difference]: Without dead ends: 3052 [2021-08-12 17:55:33,620 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-08-12 17:55:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-08-12 17:55:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2812. [2021-08-12 17:55:33,718 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) [2021-08-12 17:55:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 5332 transitions. [2021-08-12 17:55:33,731 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 5332 transitions. Word has length 145 [2021-08-12 17:55:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:33,731 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 5332 transitions. [2021-08-12 17:55:33,732 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) [2021-08-12 17:55:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 5332 transitions. [2021-08-12 17:55:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-08-12 17:55:33,738 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:33,739 INFO L550 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] [2021-08-12 17:55:33,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 17:55:33,953 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2132060766, now seen corresponding path program 9 times [2021-08-12 17:55:33,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:33,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885407919] [2021-08-12 17:55:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 175 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-12 17:55:34,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:34,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885407919] [2021-08-12 17:55:34,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885407919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131165629] [2021-08-12 17:55:34,159 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 [2021-08-12 17:55:34,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 17:55:34,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 17:55:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-08-12 17:55:34,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131165629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:34,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:34,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2021-08-12 17:55:34,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145476344] [2021-08-12 17:55:34,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 17:55:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 17:55:34,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-12 17:55:34,608 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) [2021-08-12 17:55:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:43,393 INFO L93 Difference]: Finished difference Result 4907 states and 9319 transitions. [2021-08-12 17:55:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2021-08-12 17:55:43,394 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 [2021-08-12 17:55:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:43,414 INFO L225 Difference]: With dead ends: 4907 [2021-08-12 17:55:43,415 INFO L226 Difference]: Without dead ends: 4612 [2021-08-12 17:55:43,429 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51908 ImplicationChecksByTransitivity, 8053.0ms TimeCoverageRelationStatistics Valid=21496, Invalid=89726, Unknown=0, NotChecked=0, Total=111222 [2021-08-12 17:55:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-08-12 17:55:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 3793. [2021-08-12 17:55:43,550 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) [2021-08-12 17:55:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 7186 transitions. [2021-08-12 17:55:43,564 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 7186 transitions. Word has length 153 [2021-08-12 17:55:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:43,565 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 7186 transitions. [2021-08-12 17:55:43,565 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) [2021-08-12 17:55:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 7186 transitions. [2021-08-12 17:55:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-12 17:55:43,573 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:43,573 INFO L550 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] [2021-08-12 17:55:43,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:43,789 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1107497405, now seen corresponding path program 10 times [2021-08-12 17:55:43,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:43,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483427734] [2021-08-12 17:55:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-12 17:55:43,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:43,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483427734] [2021-08-12 17:55:43,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483427734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:43,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458405040] [2021-08-12 17:55:43,978 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 [2021-08-12 17:55:44,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 17:55:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 17:55:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 232 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-12 17:55:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458405040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 17:55:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512235491] [2021-08-12 17:55:44,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 17:55:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:44,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 17:55:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-08-12 17:55:44,388 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) [2021-08-12 17:55:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:44,776 INFO L93 Difference]: Finished difference Result 4629 states and 8760 transitions. [2021-08-12 17:55:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 17:55:44,776 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 [2021-08-12 17:55:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:44,795 INFO L225 Difference]: With dead ends: 4629 [2021-08-12 17:55:44,796 INFO L226 Difference]: Without dead ends: 4495 [2021-08-12 17:55:44,799 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 17:55:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-08-12 17:55:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4207. [2021-08-12 17:55:44,983 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) [2021-08-12 17:55:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 7969 transitions. [2021-08-12 17:55:45,004 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 7969 transitions. Word has length 172 [2021-08-12 17:55:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:45,004 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 7969 transitions. [2021-08-12 17:55:45,005 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) [2021-08-12 17:55:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 7969 transitions. [2021-08-12 17:55:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-08-12 17:55:45,015 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:45,015 INFO L550 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] [2021-08-12 17:55:45,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:55:45,229 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash 466543336, now seen corresponding path program 11 times [2021-08-12 17:55:45,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:45,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753904245] [2021-08-12 17:55:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-12 17:55:45,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753904245] [2021-08-12 17:55:45,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753904245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111178695] [2021-08-12 17:55:45,465 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 [2021-08-12 17:55:45,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-12 17:55:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 17:55:45,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 49 proven. 297 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-12 17:55:45,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111178695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:45,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:45,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 17:55:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969360307] [2021-08-12 17:55:45,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 17:55:45,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 17:55:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-08-12 17:55:45,828 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) [2021-08-12 17:55:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:55:46,323 INFO L93 Difference]: Finished difference Result 5043 states and 9543 transitions. [2021-08-12 17:55:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 17:55:46,323 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 [2021-08-12 17:55:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:55:46,337 INFO L225 Difference]: With dead ends: 5043 [2021-08-12 17:55:46,337 INFO L226 Difference]: Without dead ends: 4909 [2021-08-12 17:55:46,338 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 17:55:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2021-08-12 17:55:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 4621. [2021-08-12 17:55:46,468 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) [2021-08-12 17:55:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 8752 transitions. [2021-08-12 17:55:46,484 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 8752 transitions. Word has length 180 [2021-08-12 17:55:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:55:46,485 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 8752 transitions. [2021-08-12 17:55:46,485 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) [2021-08-12 17:55:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 8752 transitions. [2021-08-12 17:55:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-08-12 17:55:46,495 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:55:46,496 INFO L550 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] [2021-08-12 17:55:46,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 17:55:46,709 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:55:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:55:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1061660397, now seen corresponding path program 12 times [2021-08-12 17:55:46,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:55:46,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276612466] [2021-08-12 17:55:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:55:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:55:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 49 proven. 370 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-12 17:55:46,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:55:46,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276612466] [2021-08-12 17:55:46,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276612466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925747547] [2021-08-12 17:55:46,956 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 [2021-08-12 17:55:47,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-12 17:55:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:55:47,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 17:55:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:55:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-08-12 17:55:47,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925747547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:55:47,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:55:47,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-08-12 17:55:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294989946] [2021-08-12 17:55:47,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-08-12 17:55:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:55:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-12 17:55:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 17:55:47,494 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) [2021-08-12 17:56:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:56:07,968 INFO L93 Difference]: Finished difference Result 7300 states and 13835 transitions. [2021-08-12 17:56:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-08-12 17:56:07,968 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 [2021-08-12 17:56:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:56:07,985 INFO L225 Difference]: With dead ends: 7300 [2021-08-12 17:56:07,985 INFO L226 Difference]: Without dead ends: 6911 [2021-08-12 17:56:08,011 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151834 ImplicationChecksByTransitivity, 19142.4ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-08-12 17:56:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2021-08-12 17:56:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 5882. [2021-08-12 17:56:08,207 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) [2021-08-12 17:56:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 11130 transitions. [2021-08-12 17:56:08,221 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 11130 transitions. Word has length 188 [2021-08-12 17:56:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:56:08,221 INFO L482 AbstractCegarLoop]: Abstraction has 5882 states and 11130 transitions. [2021-08-12 17:56:08,221 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) [2021-08-12 17:56:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 11130 transitions. [2021-08-12 17:56:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-08-12 17:56:08,233 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:56:08,233 INFO L550 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] [2021-08-12 17:56:08,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 17:56:08,449 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:56:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:56:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1951609482, now seen corresponding path program 13 times [2021-08-12 17:56:08,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:56:08,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983831567] [2021-08-12 17:56:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:56:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:56:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-08-12 17:56:08,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:56:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983831567] [2021-08-12 17:56:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983831567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161234549] [2021-08-12 17:56:08,744 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 [2021-08-12 17:56:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:56:08,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 17:56:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:56:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 61 proven. 451 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-08-12 17:56:09,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161234549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:09,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:56:09,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-12 17:56:09,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727052248] [2021-08-12 17:56:09,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 17:56:09,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:56:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 17:56:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-08-12 17:56:09,109 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) [2021-08-12 17:56:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:56:09,755 INFO L93 Difference]: Finished difference Result 6858 states and 12966 transitions. [2021-08-12 17:56:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 17:56:09,755 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 [2021-08-12 17:56:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:56:09,771 INFO L225 Difference]: With dead ends: 6858 [2021-08-12 17:56:09,771 INFO L226 Difference]: Without dead ends: 6702 [2021-08-12 17:56:09,773 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 17:56:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2021-08-12 17:56:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 6366. [2021-08-12 17:56:09,954 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) [2021-08-12 17:56:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 12044 transitions. [2021-08-12 17:56:09,973 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 12044 transitions. Word has length 207 [2021-08-12 17:56:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:56:09,973 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 12044 transitions. [2021-08-12 17:56:09,973 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) [2021-08-12 17:56:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 12044 transitions. [2021-08-12 17:56:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-08-12 17:56:09,986 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:56:09,986 INFO L550 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] [2021-08-12 17:56:10,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 17:56:10,209 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:56:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:56:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash -375008149, now seen corresponding path program 14 times [2021-08-12 17:56:10,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:56:10,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710928687] [2021-08-12 17:56:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:56:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:56:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-08-12 17:56:10,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:56:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710928687] [2021-08-12 17:56:10,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710928687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:10,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513888401] [2021-08-12 17:56:10,492 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 [2021-08-12 17:56:10,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 17:56:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:56:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 17:56:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:56:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-08-12 17:56:10,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513888401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:10,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:56:10,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-08-12 17:56:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286685397] [2021-08-12 17:56:10,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 17:56:10,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:56:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 17:56:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-08-12 17:56:10,896 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) [2021-08-12 17:56:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:56:11,633 INFO L93 Difference]: Finished difference Result 7342 states and 13880 transitions. [2021-08-12 17:56:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 17:56:11,634 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 [2021-08-12 17:56:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:56:11,651 INFO L225 Difference]: With dead ends: 7342 [2021-08-12 17:56:11,651 INFO L226 Difference]: Without dead ends: 7186 [2021-08-12 17:56:11,654 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 17:56:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-08-12 17:56:11,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6850. [2021-08-12 17:56:11,853 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) [2021-08-12 17:56:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 12958 transitions. [2021-08-12 17:56:11,872 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 12958 transitions. Word has length 215 [2021-08-12 17:56:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:56:11,873 INFO L482 AbstractCegarLoop]: Abstraction has 6850 states and 12958 transitions. [2021-08-12 17:56:11,873 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) [2021-08-12 17:56:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 12958 transitions. [2021-08-12 17:56:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-08-12 17:56:11,884 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:56:11,884 INFO L550 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] [2021-08-12 17:56:12,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:56:12,109 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:56:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:56:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1095297440, now seen corresponding path program 15 times [2021-08-12 17:56:12,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:56:12,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645304510] [2021-08-12 17:56:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:56:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:56:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 61 proven. 637 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-08-12 17:56:12,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:56:12,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645304510] [2021-08-12 17:56:12,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645304510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:12,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052905351] [2021-08-12 17:56:12,456 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 [2021-08-12 17:56:12,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 17:56:12,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:56:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 17:56:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:56:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-08-12 17:56:13,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052905351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:13,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:56:13,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15] total 42 [2021-08-12 17:56:13,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052376391] [2021-08-12 17:56:13,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 17:56:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:56:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 17:56:13,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 17:56:13,056 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) [2021-08-12 17:56:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:56:56,375 INFO L93 Difference]: Finished difference Result 10113 states and 19137 transitions. [2021-08-12 17:56:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 821 states. [2021-08-12 17:56:56,375 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 [2021-08-12 17:56:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:56:56,395 INFO L225 Difference]: With dead ends: 10113 [2021-08-12 17:56:56,395 INFO L226 Difference]: Without dead ends: 9630 [2021-08-12 17:56:56,545 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 838 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349585 ImplicationChecksByTransitivity, 40875.6ms TimeCoverageRelationStatistics Valid=125901, Invalid=578859, Unknown=0, NotChecked=0, Total=704760 [2021-08-12 17:56:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2021-08-12 17:56:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 8391. [2021-08-12 17:56:56,774 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) [2021-08-12 17:56:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 15860 transitions. [2021-08-12 17:56:56,798 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 15860 transitions. Word has length 223 [2021-08-12 17:56:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:56:56,798 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 15860 transitions. [2021-08-12 17:56:56,798 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) [2021-08-12 17:56:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 15860 transitions. [2021-08-12 17:56:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-08-12 17:56:56,812 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:56:56,812 INFO L550 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] [2021-08-12 17:56:57,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 17:56:57,029 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:56:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:56:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1919014401, now seen corresponding path program 16 times [2021-08-12 17:56:57,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:56:57,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812791390] [2021-08-12 17:56:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:56:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:56:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-08-12 17:56:57,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:56:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812791390] [2021-08-12 17:56:57,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812791390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710847328] [2021-08-12 17:56:57,409 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 [2021-08-12 17:56:57,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 17:56:57,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:56:57,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 17:56:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:56:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 73 proven. 742 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-08-12 17:56:57,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710847328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:57,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:56:57,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-08-12 17:56:57,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934792517] [2021-08-12 17:56:57,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 17:56:57,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:56:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 17:56:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 17:56:57,897 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) [2021-08-12 17:56:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:56:58,922 INFO L93 Difference]: Finished difference Result 9507 states and 17958 transitions. [2021-08-12 17:56:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 17:56:58,923 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 [2021-08-12 17:56:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:56:58,938 INFO L225 Difference]: With dead ends: 9507 [2021-08-12 17:56:58,938 INFO L226 Difference]: Without dead ends: 9329 [2021-08-12 17:56:58,941 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 694.0ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 17:56:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-08-12 17:56:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 8945. [2021-08-12 17:56:59,182 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) [2021-08-12 17:56:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 16905 transitions. [2021-08-12 17:56:59,204 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 16905 transitions. Word has length 242 [2021-08-12 17:56:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:56:59,204 INFO L482 AbstractCegarLoop]: Abstraction has 8945 states and 16905 transitions. [2021-08-12 17:56:59,204 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) [2021-08-12 17:56:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 16905 transitions. [2021-08-12 17:56:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-08-12 17:56:59,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:56:59,216 INFO L550 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] [2021-08-12 17:56:59,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:56:59,417 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:56:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:56:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1596434710, now seen corresponding path program 17 times [2021-08-12 17:56:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:56:59,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796119719] [2021-08-12 17:56:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:56:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:56:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-08-12 17:56:59,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:56:59,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796119719] [2021-08-12 17:56:59,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796119719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:56:59,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480083953] [2021-08-12 17:56:59,836 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 [2021-08-12 17:57:00,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-12 17:57:00,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:57:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 17:57:00,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:57:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 73 proven. 855 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-08-12 17:57:00,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480083953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:57:00,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:57:00,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-08-12 17:57:00,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108014387] [2021-08-12 17:57:00,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-08-12 17:57:00,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:57:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-12 17:57:00,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 17:57:00,425 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) [2021-08-12 17:57:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:57:01,577 INFO L93 Difference]: Finished difference Result 10061 states and 19003 transitions. [2021-08-12 17:57:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 17:57:01,578 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 [2021-08-12 17:57:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:57:01,591 INFO L225 Difference]: With dead ends: 10061 [2021-08-12 17:57:01,591 INFO L226 Difference]: Without dead ends: 9883 [2021-08-12 17:57:01,593 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 778.8ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 17:57:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2021-08-12 17:57:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 9499. [2021-08-12 17:57:01,807 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) [2021-08-12 17:57:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 17950 transitions. [2021-08-12 17:57:01,827 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 17950 transitions. Word has length 250 [2021-08-12 17:57:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:57:01,828 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 17950 transitions. [2021-08-12 17:57:01,828 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) [2021-08-12 17:57:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 17950 transitions. [2021-08-12 17:57:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-08-12 17:57:01,838 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:57:01,838 INFO L550 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] [2021-08-12 17:57:02,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:57:02,039 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:57:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:57:02,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1208457003, now seen corresponding path program 18 times [2021-08-12 17:57:02,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:57:02,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722172333] [2021-08-12 17:57:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:57:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:57:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 73 proven. 976 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-08-12 17:57:02,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:57:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722172333] [2021-08-12 17:57:02,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722172333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:57:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520209914] [2021-08-12 17:57:02,479 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 [2021-08-12 17:57:02,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-12 17:57:02,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:57:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 17:57:02,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:57:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2021-08-12 17:57:03,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520209914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:57:03,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:57:03,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 50 [2021-08-12 17:57:03,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871977616] [2021-08-12 17:57:03,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-08-12 17:57:03,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:57:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-12 17:57:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 17:57:03,279 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) [2021-08-12 17:58:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:58:25,484 INFO L93 Difference]: Finished difference Result 13346 states and 25225 transitions. [2021-08-12 17:58:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1151 states. [2021-08-12 17:58:25,484 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 [2021-08-12 17:58:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:58:25,507 INFO L225 Difference]: With dead ends: 13346 [2021-08-12 17:58:25,507 INFO L226 Difference]: Without dead ends: 12769 [2021-08-12 17:58:25,702 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 1172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693207 ImplicationChecksByTransitivity, 77741.0ms TimeCoverageRelationStatistics Valid=240556, Invalid=1136546, Unknown=0, NotChecked=0, Total=1377102 [2021-08-12 17:58:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2021-08-12 17:58:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 11320. [2021-08-12 17:58:25,983 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) [2021-08-12 17:58:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 21376 transitions. [2021-08-12 17:58:26,009 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 21376 transitions. Word has length 258 [2021-08-12 17:58:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:58:26,010 INFO L482 AbstractCegarLoop]: Abstraction has 11320 states and 21376 transitions. [2021-08-12 17:58:26,010 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) [2021-08-12 17:58:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 21376 transitions. [2021-08-12 17:58:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-08-12 17:58:26,022 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:58:26,022 INFO L550 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] [2021-08-12 17:58:26,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 17:58:26,224 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:58:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:58:26,224 INFO L82 PathProgramCache]: Analyzing trace with hash 99810484, now seen corresponding path program 19 times [2021-08-12 17:58:26,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:58:26,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574059078] [2021-08-12 17:58:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:58:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:58:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-12 17:58:26,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:58:26,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574059078] [2021-08-12 17:58:26,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574059078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:58:26,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139352350] [2021-08-12 17:58:26,704 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 [2021-08-12 17:58:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:58:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 17:58:26,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:58:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 85 proven. 1105 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-12 17:58:27,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139352350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:58:27,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:58:27,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-08-12 17:58:27,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525588740] [2021-08-12 17:58:27,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 17:58:27,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:58:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 17:58:27,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 17:58:27,169 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) [2021-08-12 17:58:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:58:28,683 INFO L93 Difference]: Finished difference Result 12576 states and 23736 transitions. [2021-08-12 17:58:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 17:58:28,684 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 [2021-08-12 17:58:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:58:28,713 INFO L225 Difference]: With dead ends: 12576 [2021-08-12 17:58:28,714 INFO L226 Difference]: Without dead ends: 12376 [2021-08-12 17:58:28,719 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 950.4ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 17:58:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2021-08-12 17:58:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 11944. [2021-08-12 17:58:29,050 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) [2021-08-12 17:58:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11944 states to 11944 states and 22552 transitions. [2021-08-12 17:58:29,084 INFO L78 Accepts]: Start accepts. Automaton has 11944 states and 22552 transitions. Word has length 277 [2021-08-12 17:58:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:58:29,084 INFO L482 AbstractCegarLoop]: Abstraction has 11944 states and 22552 transitions. [2021-08-12 17:58:29,084 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) [2021-08-12 17:58:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11944 states and 22552 transitions. [2021-08-12 17:58:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-08-12 17:58:29,096 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:58:29,096 INFO L550 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] [2021-08-12 17:58:29,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 17:58:29,297 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:58:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:58:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1815220201, now seen corresponding path program 20 times [2021-08-12 17:58:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:58:29,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756109317] [2021-08-12 17:58:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:58:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:58:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-12 17:58:29,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:58:29,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756109317] [2021-08-12 17:58:29,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756109317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:58:29,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134669821] [2021-08-12 17:58:29,983 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 [2021-08-12 17:58:30,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 17:58:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:58:30,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 17:58:30,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:58:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 85 proven. 1242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-12 17:58:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134669821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:58:30,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:58:30,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-08-12 17:58:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965434127] [2021-08-12 17:58:30,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-08-12 17:58:30,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:58:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-12 17:58:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 17:58:30,431 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) [2021-08-12 17:58:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 17:58:32,114 INFO L93 Difference]: Finished difference Result 13200 states and 24912 transitions. [2021-08-12 17:58:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-12 17:58:32,114 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 [2021-08-12 17:58:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 17:58:32,136 INFO L225 Difference]: With dead ends: 13200 [2021-08-12 17:58:32,136 INFO L226 Difference]: Without dead ends: 13000 [2021-08-12 17:58:32,140 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1205.9ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-08-12 17:58:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13000 states. [2021-08-12 17:58:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13000 to 12568. [2021-08-12 17:58:32,493 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) [2021-08-12 17:58:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 23728 transitions. [2021-08-12 17:58:32,533 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 23728 transitions. Word has length 285 [2021-08-12 17:58:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 17:58:32,534 INFO L482 AbstractCegarLoop]: Abstraction has 12568 states and 23728 transitions. [2021-08-12 17:58:32,534 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) [2021-08-12 17:58:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 23728 transitions. [2021-08-12 17:58:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-08-12 17:58:32,552 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 17:58:32,552 INFO L550 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] [2021-08-12 17:58:32,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 17:58:32,778 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 17:58:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 17:58:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash -371646946, now seen corresponding path program 21 times [2021-08-12 17:58:32,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 17:58:32,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639453343] [2021-08-12 17:58:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 17:58:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 17:58:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 85 proven. 1387 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-12 17:58:33,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 17:58:33,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639453343] [2021-08-12 17:58:33,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639453343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:58:33,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721157744] [2021-08-12 17:58:33,394 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 [2021-08-12 17:58:33,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 17:58:33,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 17:58:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 17:58:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 17:58:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2021-08-12 17:58:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721157744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 17:58:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 17:58:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 19] total 58 [2021-08-12 17:58:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216770583] [2021-08-12 17:58:34,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-08-12 17:58:34,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 17:58:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-12 17:58:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 17:58:34,258 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) [2021-08-12 18:00:13,615 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-08-12 18:01:01,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:01,505 INFO L93 Difference]: Finished difference Result 16483 states and 31151 transitions. [2021-08-12 18:01:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1535 states. [2021-08-12 18:01:01,506 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 [2021-08-12 18:01:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:01,533 INFO L225 Difference]: With dead ends: 16483 [2021-08-12 18:01:01,533 INFO L226 Difference]: Without dead ends: 15812 [2021-08-12 18:01:01,651 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2413 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 1560 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240164 ImplicationChecksByTransitivity, 138601.9ms TimeCoverageRelationStatistics Valid=418764, Invalid=2019518, Unknown=0, NotChecked=0, Total=2438282 [2021-08-12 18:01:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15812 states. [2021-08-12 18:01:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15812 to 14669. [2021-08-12 18:01:02,058 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) [2021-08-12 18:01:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14669 states to 14669 states and 27678 transitions. [2021-08-12 18:01:02,096 INFO L78 Accepts]: Start accepts. Automaton has 14669 states and 27678 transitions. Word has length 293 [2021-08-12 18:01:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:02,097 INFO L482 AbstractCegarLoop]: Abstraction has 14669 states and 27678 transitions. [2021-08-12 18:01:02,097 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) [2021-08-12 18:01:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14669 states and 27678 transitions. [2021-08-12 18:01:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-08-12 18:01:02,118 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:02,118 INFO L550 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] [2021-08-12 18:01:02,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 18:01:02,319 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:02,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:02,319 INFO L82 PathProgramCache]: Analyzing trace with hash 120507201, now seen corresponding path program 22 times [2021-08-12 18:01:02,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:02,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863799089] [2021-08-12 18:01:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:02,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:02,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863799089] [2021-08-12 18:01:02,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863799089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:02,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383860669] [2021-08-12 18:01:02,564 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 [2021-08-12 18:01:02,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:01:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 18:01:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:03,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383860669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:03,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:03,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 18:01:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90368567] [2021-08-12 18:01:03,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 18:01:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 18:01:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:01:03,248 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) [2021-08-12 18:01:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:04,816 INFO L93 Difference]: Finished difference Result 17798 states and 33568 transitions. [2021-08-12 18:01:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 18:01:04,816 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 [2021-08-12 18:01:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:04,839 INFO L225 Difference]: With dead ends: 17798 [2021-08-12 18:01:04,839 INFO L226 Difference]: Without dead ends: 17289 [2021-08-12 18:01:04,843 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 18:01:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-08-12 18:01:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 16146. [2021-08-12 18:01:05,280 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) [2021-08-12 18:01:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 30452 transitions. [2021-08-12 18:01:05,316 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 30452 transitions. Word has length 312 [2021-08-12 18:01:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:05,316 INFO L482 AbstractCegarLoop]: Abstraction has 16146 states and 30452 transitions. [2021-08-12 18:01:05,316 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) [2021-08-12 18:01:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 30452 transitions. [2021-08-12 18:01:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-08-12 18:01:05,335 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:05,336 INFO L550 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] [2021-08-12 18:01:05,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:01:05,561 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1013905773, now seen corresponding path program 23 times [2021-08-12 18:01:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:05,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872543128] [2021-08-12 18:01:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:05,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:05,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872543128] [2021-08-12 18:01:05,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872543128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:05,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582172305] [2021-08-12 18:01:05,825 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 [2021-08-12 18:01:06,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-12 18:01:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 18:01:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:06,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582172305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:06,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:06,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-08-12 18:01:06,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693023831] [2021-08-12 18:01:06,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 18:01:06,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:06,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 18:01:06,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:01:06,620 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) [2021-08-12 18:01:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:08,080 INFO L93 Difference]: Finished difference Result 19275 states and 36342 transitions. [2021-08-12 18:01:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 18:01:08,080 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 [2021-08-12 18:01:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:08,112 INFO L225 Difference]: With dead ends: 19275 [2021-08-12 18:01:08,113 INFO L226 Difference]: Without dead ends: 18766 [2021-08-12 18:01:08,119 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 18:01:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18766 states. [2021-08-12 18:01:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18766 to 17623. [2021-08-12 18:01:08,689 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) [2021-08-12 18:01:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17623 states to 17623 states and 33226 transitions. [2021-08-12 18:01:08,812 INFO L78 Accepts]: Start accepts. Automaton has 17623 states and 33226 transitions. Word has length 323 [2021-08-12 18:01:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:08,812 INFO L482 AbstractCegarLoop]: Abstraction has 17623 states and 33226 transitions. [2021-08-12 18:01:08,812 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) [2021-08-12 18:01:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 17623 states and 33226 transitions. [2021-08-12 18:01:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-08-12 18:01:08,828 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:08,828 INFO L550 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] [2021-08-12 18:01:09,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 18:01:09,028 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1039328257, now seen corresponding path program 24 times [2021-08-12 18:01:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:09,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535973960] [2021-08-12 18:01:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:09,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:09,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535973960] [2021-08-12 18:01:09,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535973960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:09,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808608731] [2021-08-12 18:01:09,335 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 [2021-08-12 18:01:09,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-08-12 18:01:09,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 18:01:09,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:10,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808608731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:10,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:10,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-12 18:01:10,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387436901] [2021-08-12 18:01:10,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 18:01:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 18:01:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:01:10,185 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) [2021-08-12 18:01:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:11,886 INFO L93 Difference]: Finished difference Result 20752 states and 39116 transitions. [2021-08-12 18:01:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 18:01:11,887 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 [2021-08-12 18:01:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:11,920 INFO L225 Difference]: With dead ends: 20752 [2021-08-12 18:01:11,920 INFO L226 Difference]: Without dead ends: 20243 [2021-08-12 18:01:11,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 18:01:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20243 states. [2021-08-12 18:01:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20243 to 19100. [2021-08-12 18:01:12,494 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) [2021-08-12 18:01:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19100 states to 19100 states and 36000 transitions. [2021-08-12 18:01:12,537 INFO L78 Accepts]: Start accepts. Automaton has 19100 states and 36000 transitions. Word has length 334 [2021-08-12 18:01:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:12,537 INFO L482 AbstractCegarLoop]: Abstraction has 19100 states and 36000 transitions. [2021-08-12 18:01:12,538 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) [2021-08-12 18:01:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 19100 states and 36000 transitions. [2021-08-12 18:01:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-08-12 18:01:12,559 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:12,559 INFO L550 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] [2021-08-12 18:01:12,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:01:12,759 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash -687213101, now seen corresponding path program 25 times [2021-08-12 18:01:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:12,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499274005] [2021-08-12 18:01:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:13,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499274005] [2021-08-12 18:01:13,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499274005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551062242] [2021-08-12 18:01:13,066 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 [2021-08-12 18:01:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 18:01:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:13,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551062242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:13,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:13,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-08-12 18:01:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999417547] [2021-08-12 18:01:13,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 18:01:13,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 18:01:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-08-12 18:01:13,726 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) [2021-08-12 18:01:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:15,599 INFO L93 Difference]: Finished difference Result 22229 states and 41890 transitions. [2021-08-12 18:01:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 18:01:15,600 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 [2021-08-12 18:01:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:15,636 INFO L225 Difference]: With dead ends: 22229 [2021-08-12 18:01:15,636 INFO L226 Difference]: Without dead ends: 21720 [2021-08-12 18:01:15,643 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 18:01:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21720 states. [2021-08-12 18:01:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21720 to 20577. [2021-08-12 18:01:16,286 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) [2021-08-12 18:01:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20577 states to 20577 states and 38774 transitions. [2021-08-12 18:01:16,329 INFO L78 Accepts]: Start accepts. Automaton has 20577 states and 38774 transitions. Word has length 345 [2021-08-12 18:01:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:16,330 INFO L482 AbstractCegarLoop]: Abstraction has 20577 states and 38774 transitions. [2021-08-12 18:01:16,330 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) [2021-08-12 18:01:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 20577 states and 38774 transitions. [2021-08-12 18:01:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-08-12 18:01:16,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:16,350 INFO L550 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] [2021-08-12 18:01:16,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 18:01:16,551 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1790448447, now seen corresponding path program 26 times [2021-08-12 18:01:16,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:16,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158443491] [2021-08-12 18:01:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:16,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158443491] [2021-08-12 18:01:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158443491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808507840] [2021-08-12 18:01:16,956 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 [2021-08-12 18:01:17,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:01:17,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 18:01:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 891 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808507840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:17,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:17,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-08-12 18:01:17,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119417534] [2021-08-12 18:01:17,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 18:01:17,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 18:01:17,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-12 18:01:17,589 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) [2021-08-12 18:01:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:19,847 INFO L93 Difference]: Finished difference Result 23706 states and 44664 transitions. [2021-08-12 18:01:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 18:01:19,848 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 [2021-08-12 18:01:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:19,890 INFO L225 Difference]: With dead ends: 23706 [2021-08-12 18:01:19,890 INFO L226 Difference]: Without dead ends: 23197 [2021-08-12 18:01:19,899 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 18:01:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23197 states. [2021-08-12 18:01:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23197 to 22054. [2021-08-12 18:01:20,631 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) [2021-08-12 18:01:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 41548 transitions. [2021-08-12 18:01:20,682 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 41548 transitions. Word has length 356 [2021-08-12 18:01:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:20,682 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 41548 transitions. [2021-08-12 18:01:20,683 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) [2021-08-12 18:01:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 41548 transitions. [2021-08-12 18:01:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-08-12 18:01:20,704 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:20,704 INFO L550 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] [2021-08-12 18:01:20,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 18:01:20,904 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:20,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1526461715, now seen corresponding path program 27 times [2021-08-12 18:01:20,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:20,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987848416] [2021-08-12 18:01:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:21,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987848416] [2021-08-12 18:01:21,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987848416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574429837] [2021-08-12 18:01:21,326 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 [2021-08-12 18:01:21,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-12 18:01:21,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 18:01:21,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574429837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:22,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:22,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-08-12 18:01:22,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168400223] [2021-08-12 18:01:22,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 18:01:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 18:01:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 18:01:22,110 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) [2021-08-12 18:01:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:24,480 INFO L93 Difference]: Finished difference Result 25183 states and 47438 transitions. [2021-08-12 18:01:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 18:01:24,481 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 [2021-08-12 18:01:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:24,521 INFO L225 Difference]: With dead ends: 25183 [2021-08-12 18:01:24,521 INFO L226 Difference]: Without dead ends: 24674 [2021-08-12 18:01:24,529 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 696.0ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 18:01:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24674 states. [2021-08-12 18:01:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24674 to 23531. [2021-08-12 18:01:25,348 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) [2021-08-12 18:01:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23531 states to 23531 states and 44322 transitions. [2021-08-12 18:01:25,400 INFO L78 Accepts]: Start accepts. Automaton has 23531 states and 44322 transitions. Word has length 367 [2021-08-12 18:01:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:25,400 INFO L482 AbstractCegarLoop]: Abstraction has 23531 states and 44322 transitions. [2021-08-12 18:01:25,400 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) [2021-08-12 18:01:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 23531 states and 44322 transitions. [2021-08-12 18:01:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-08-12 18:01:25,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:25,423 INFO L550 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] [2021-08-12 18:01:25,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:01:25,623 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1059461759, now seen corresponding path program 28 times [2021-08-12 18:01:25,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:25,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119840574] [2021-08-12 18:01:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:26,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119840574] [2021-08-12 18:01:26,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119840574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:26,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681711066] [2021-08-12 18:01:26,118 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 [2021-08-12 18:01:26,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:01:26,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 18:01:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:26,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681711066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:26,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:26,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-08-12 18:01:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291901601] [2021-08-12 18:01:26,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-08-12 18:01:26,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-12 18:01:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 18:01:26,787 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) [2021-08-12 18:01:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:29,379 INFO L93 Difference]: Finished difference Result 26660 states and 50212 transitions. [2021-08-12 18:01:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 18:01:29,380 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 [2021-08-12 18:01:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:29,421 INFO L225 Difference]: With dead ends: 26660 [2021-08-12 18:01:29,421 INFO L226 Difference]: Without dead ends: 26151 [2021-08-12 18:01:29,429 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 18:01:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-08-12 18:01:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25008. [2021-08-12 18:01:30,309 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) [2021-08-12 18:01:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25008 states to 25008 states and 47096 transitions. [2021-08-12 18:01:30,364 INFO L78 Accepts]: Start accepts. Automaton has 25008 states and 47096 transitions. Word has length 378 [2021-08-12 18:01:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:30,364 INFO L482 AbstractCegarLoop]: Abstraction has 25008 states and 47096 transitions. [2021-08-12 18:01:30,364 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) [2021-08-12 18:01:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 25008 states and 47096 transitions. [2021-08-12 18:01:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-08-12 18:01:30,395 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:30,395 INFO L550 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] [2021-08-12 18:01:30,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:01:30,597 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash -667220909, now seen corresponding path program 29 times [2021-08-12 18:01:30,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:30,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059101183] [2021-08-12 18:01:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:31,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059101183] [2021-08-12 18:01:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059101183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933641891] [2021-08-12 18:01:31,099 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 [2021-08-12 18:01:31,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-12 18:01:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 18:01:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1356 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:31,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933641891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:31,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:31,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-08-12 18:01:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828861287] [2021-08-12 18:01:31,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-08-12 18:01:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-12 18:01:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 18:01:31,869 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) [2021-08-12 18:01:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:34,739 INFO L93 Difference]: Finished difference Result 28137 states and 52986 transitions. [2021-08-12 18:01:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 18:01:34,739 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 [2021-08-12 18:01:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:34,786 INFO L225 Difference]: With dead ends: 28137 [2021-08-12 18:01:34,786 INFO L226 Difference]: Without dead ends: 27628 [2021-08-12 18:01:34,795 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 18:01:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27628 states. [2021-08-12 18:01:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27628 to 26485. [2021-08-12 18:01:35,634 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) [2021-08-12 18:01:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26485 states to 26485 states and 49870 transitions. [2021-08-12 18:01:35,697 INFO L78 Accepts]: Start accepts. Automaton has 26485 states and 49870 transitions. Word has length 389 [2021-08-12 18:01:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:35,698 INFO L482 AbstractCegarLoop]: Abstraction has 26485 states and 49870 transitions. [2021-08-12 18:01:35,698 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) [2021-08-12 18:01:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 26485 states and 49870 transitions. [2021-08-12 18:01:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-08-12 18:01:35,727 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:35,727 INFO L550 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] [2021-08-12 18:01:35,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-12 18:01:35,928 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash 726978113, now seen corresponding path program 30 times [2021-08-12 18:01:35,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:35,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119736592] [2021-08-12 18:01:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:36,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:36,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119736592] [2021-08-12 18:01:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119736592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:36,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378909287] [2021-08-12 18:01:36,607 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 [2021-08-12 18:01:37,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-08-12 18:01:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 18:01:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1533 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:37,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378909287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:37,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:37,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-08-12 18:01:37,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755313558] [2021-08-12 18:01:37,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 18:01:37,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:37,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 18:01:37,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 18:01:37,595 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) [2021-08-12 18:01:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:40,585 INFO L93 Difference]: Finished difference Result 29614 states and 55760 transitions. [2021-08-12 18:01:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 18:01:40,586 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 [2021-08-12 18:01:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:40,644 INFO L225 Difference]: With dead ends: 29614 [2021-08-12 18:01:40,644 INFO L226 Difference]: Without dead ends: 29105 [2021-08-12 18:01:40,656 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1007.1ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 18:01:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29105 states. [2021-08-12 18:01:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29105 to 27962. [2021-08-12 18:01:41,663 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) [2021-08-12 18:01:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27962 states to 27962 states and 52644 transitions. [2021-08-12 18:01:41,720 INFO L78 Accepts]: Start accepts. Automaton has 27962 states and 52644 transitions. Word has length 400 [2021-08-12 18:01:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:41,720 INFO L482 AbstractCegarLoop]: Abstraction has 27962 states and 52644 transitions. [2021-08-12 18:01:41,720 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) [2021-08-12 18:01:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27962 states and 52644 transitions. [2021-08-12 18:01:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-08-12 18:01:41,748 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:41,749 INFO L550 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] [2021-08-12 18:01:41,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:01:41,957 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1063574637, now seen corresponding path program 31 times [2021-08-12 18:01:41,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:41,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783475770] [2021-08-12 18:01:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:42,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:42,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783475770] [2021-08-12 18:01:42,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783475770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:42,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778514479] [2021-08-12 18:01:42,571 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 [2021-08-12 18:01:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 18:01:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1721 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778514479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:43,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:43,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-08-12 18:01:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279033087] [2021-08-12 18:01:43,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-08-12 18:01:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-12 18:01:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 18:01:43,245 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) [2021-08-12 18:01:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:46,677 INFO L93 Difference]: Finished difference Result 31091 states and 58534 transitions. [2021-08-12 18:01:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-12 18:01:46,677 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 [2021-08-12 18:01:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:46,726 INFO L225 Difference]: With dead ends: 31091 [2021-08-12 18:01:46,726 INFO L226 Difference]: Without dead ends: 30582 [2021-08-12 18:01:46,734 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1084.0ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-08-12 18:01:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30582 states. [2021-08-12 18:01:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30582 to 29439. [2021-08-12 18:01:47,760 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) [2021-08-12 18:01:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29439 states to 29439 states and 55418 transitions. [2021-08-12 18:01:47,834 INFO L78 Accepts]: Start accepts. Automaton has 29439 states and 55418 transitions. Word has length 411 [2021-08-12 18:01:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:47,834 INFO L482 AbstractCegarLoop]: Abstraction has 29439 states and 55418 transitions. [2021-08-12 18:01:47,834 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) [2021-08-12 18:01:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 29439 states and 55418 transitions. [2021-08-12 18:01:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-08-12 18:01:47,865 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:47,865 INFO L550 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] [2021-08-12 18:01:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 18:01:48,069 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1234917631, now seen corresponding path program 32 times [2021-08-12 18:01:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:48,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136772224] [2021-08-12 18:01:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:48,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:48,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136772224] [2021-08-12 18:01:48,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136772224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:48,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590808844] [2021-08-12 18:01:48,664 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 [2021-08-12 18:01:48,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:01:48,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:48,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 18:01:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1920 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-08-12 18:01:49,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590808844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:49,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:49,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-08-12 18:01:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129224806] [2021-08-12 18:01:49,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-08-12 18:01:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-12 18:01:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 18:01:49,328 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) [2021-08-12 18:01:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:01:52,848 INFO L93 Difference]: Finished difference Result 31425 states and 59202 transitions. [2021-08-12 18:01:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-12 18:01:52,849 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 [2021-08-12 18:01:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:01:52,898 INFO L225 Difference]: With dead ends: 31425 [2021-08-12 18:01:52,898 INFO L226 Difference]: Without dead ends: 30916 [2021-08-12 18:01:52,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1152.2ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-08-12 18:01:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30916 states. [2021-08-12 18:01:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30916 to 30916. [2021-08-12 18:01:53,952 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) [2021-08-12 18:01:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30916 states to 30916 states and 58192 transitions. [2021-08-12 18:01:54,026 INFO L78 Accepts]: Start accepts. Automaton has 30916 states and 58192 transitions. Word has length 422 [2021-08-12 18:01:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:01:54,027 INFO L482 AbstractCegarLoop]: Abstraction has 30916 states and 58192 transitions. [2021-08-12 18:01:54,027 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) [2021-08-12 18:01:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 30916 states and 58192 transitions. [2021-08-12 18:01:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-08-12 18:01:54,058 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:01:54,058 INFO L550 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] [2021-08-12 18:01:54,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 18:01:54,258 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:01:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:01:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1359981869, now seen corresponding path program 33 times [2021-08-12 18:01:54,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:01:54,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809925067] [2021-08-12 18:01:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:01:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:01:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:01:56,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:01:56,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809925067] [2021-08-12 18:01:56,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809925067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:56,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741687928] [2021-08-12 18:01:56,669 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 [2021-08-12 18:01:57,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-08-12 18:01:57,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:01:57,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-08-12 18:01:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:01:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:01:58,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741687928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:01:58,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:01:58,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-08-12 18:01:58,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978198489] [2021-08-12 18:01:58,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-08-12 18:01:58,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:01:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-12 18:01:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 18:01:58,197 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) [2021-08-12 18:02:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:02:35,412 INFO L93 Difference]: Finished difference Result 150997 states and 288644 transitions. [2021-08-12 18:02:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-08-12 18:02:35,412 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 [2021-08-12 18:02:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:02:35,692 INFO L225 Difference]: With dead ends: 150997 [2021-08-12 18:02:35,692 INFO L226 Difference]: Without dead ends: 150983 [2021-08-12 18:02:35,937 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32634 ImplicationChecksByTransitivity, 10528.4ms TimeCoverageRelationStatistics Valid=1162, Invalid=102844, Unknown=0, NotChecked=0, Total=104006 [2021-08-12 18:02:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150983 states. [2021-08-12 18:02:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150983 to 32534. [2021-08-12 18:02:38,027 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) [2021-08-12 18:02:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32534 states to 32534 states and 61585 transitions. [2021-08-12 18:02:38,135 INFO L78 Accepts]: Start accepts. Automaton has 32534 states and 61585 transitions. Word has length 433 [2021-08-12 18:02:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:02:38,136 INFO L482 AbstractCegarLoop]: Abstraction has 32534 states and 61585 transitions. [2021-08-12 18:02:38,136 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) [2021-08-12 18:02:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 32534 states and 61585 transitions. [2021-08-12 18:02:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-08-12 18:02:38,167 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:02:38,167 INFO L550 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] [2021-08-12 18:02:38,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 18:02:38,367 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 18:02:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:02:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 454116571, now seen corresponding path program 34 times [2021-08-12 18:02:38,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:02:38,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127430354] [2021-08-12 18:02:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:02:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:02:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:02:40,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:02:40,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127430354] [2021-08-12 18:02:40,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127430354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:02:40,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586305833] [2021-08-12 18:02:40,766 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 [2021-08-12 18:02:40,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:02:40,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:02:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 165 conjunts are in the unsatisfiable core [2021-08-12 18:02:40,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:02:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:02:41,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586305833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:02:41,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:02:41,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-08-12 18:02:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661140147] [2021-08-12 18:02:41,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-08-12 18:02:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:02:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-12 18:02:41,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-08-12 18:02:41,831 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) Received shutdown request... [2021-08-12 18:03:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-08-12 18:03:00,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 18:03:00,425 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 18:03:00,427 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 18:03:00,428 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 18:03:00,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 06:03:00 BasicIcfg [2021-08-12 18:03:00,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 18:03:00,429 INFO L168 Benchmark]: Toolchain (without parser) took 459470.51 ms. Allocated memory was 206.6 MB in the beginning and 3.5 GB in the end (delta: 3.3 GB). Free memory was 168.7 MB in the beginning and 878.0 MB in the end (delta: -709.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. [2021-08-12 18:03:00,429 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 206.6 MB. Free memory is still 187.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 18:03:00,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 856.26 ms. Allocated memory is still 206.6 MB. Free memory was 168.5 MB in the beginning and 114.7 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.8 MB. Max. memory is 8.0 GB. [2021-08-12 18:03:00,429 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.37 ms. Allocated memory is still 206.6 MB. Free memory was 114.7 MB in the beginning and 112.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 18:03:00,429 INFO L168 Benchmark]: Boogie Preprocessor took 32.56 ms. Allocated memory is still 206.6 MB. Free memory was 112.6 MB in the beginning and 111.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 18:03:00,429 INFO L168 Benchmark]: RCFGBuilder took 535.23 ms. Allocated memory is still 206.6 MB. Free memory was 111.0 MB in the beginning and 84.3 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-08-12 18:03:00,429 INFO L168 Benchmark]: TraceAbstraction took 457975.90 ms. Allocated memory was 206.6 MB in the beginning and 3.5 GB in the end (delta: 3.3 GB). Free memory was 84.3 MB in the beginning and 878.0 MB in the end (delta: -793.7 MB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-12 18:03:00,430 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 206.6 MB. Free memory is still 187.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 856.26 ms. Allocated memory is still 206.6 MB. Free memory was 168.5 MB in the beginning and 114.7 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 63.37 ms. Allocated memory is still 206.6 MB. Free memory was 114.7 MB in the beginning and 112.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.56 ms. Allocated memory is still 206.6 MB. Free memory was 112.6 MB in the beginning and 111.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 535.23 ms. Allocated memory is still 206.6 MB. Free memory was 111.0 MB in the beginning and 84.3 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 457975.90 ms. Allocated memory was 206.6 MB in the beginning and 3.5 GB in the end (delta: 3.3 GB). Free memory was 84.3 MB in the beginning and 878.0 MB in the end (delta: -793.7 MB). Peak memory consumption was 2.5 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 (32534states) and FLOYD_HOARE automaton (currently 119 states, 70 states before enhancement),while ReachableStatesComputation was computing reachable states (33147 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 457863.3ms, OverallIterations: 37, TraceHistogramMax: 20, EmptinessCheckTime: 513.0ms, AutomataDifference: 398231.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 54.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9493 SDtfs, 127235 SDslu, 422439 SDs, 0 SdLazy, 63934 SolverSat, 7733 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21628.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16941 GetRequests, 10634 SyntacticMatches, 4 SemanticMatches, 6303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547844 ImplicationChecksByTransitivity, 316582.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32534occurred in iteration=36, InterpolantAutomatonStates: 5784, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 14897.9ms AutomataMinimizationTime, 36 MinimizatonAttempts, 140673 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1053.3ms SsaConstructionTime, 4849.8ms SatisfiabilityAnalysisTime, 28285.6ms InterpolantComputationTime, 17556 NumberOfCodeBlocks, 16955 NumberOfCodeBlocksAsserted, 290 NumberOfCheckSat, 17485 ConstructedInterpolants, 0 QuantifiedInterpolants, 48749 SizeOfPredicates, 704 NumberOfNonLiveVariables, 16592 ConjunctsInSsa, 1014 ConjunctsInUnsatCore, 71 InterpolantComputations, 4 PerfectInterpolantSequences, 41720/96369 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