/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:15:15,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:15:15,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:15:15,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:15:15,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:15:15,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:15:15,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:15:15,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:15:15,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:15:15,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:15:15,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:15:15,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:15:15,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:15:15,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:15:15,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:15:15,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:15:15,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:15:15,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:15:15,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:15:15,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:15:15,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:15:15,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:15:15,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:15:15,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:15:15,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 17:15:15,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 17:15:15,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 17:15:15,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 17:15:15,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 17:15:15,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 17:15:15,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 17:15:15,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 17:15:15,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 17:15:15,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:15:15,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:15:15,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:15:15,752 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-Delay.epf [2021-08-21 17:15:15,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:15:15,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:15:15,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:15:15,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:15:15,774 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:15:15,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:15:15,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:15:15,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:15:15,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:15:15,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:15:15,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:15:15,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:15:15,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:15:15,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:15:15,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:15:15,777 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:15:15,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:15:15,777 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:15:15,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:15:16,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:15:16,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:15:16,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:15:16,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 17:15:16,054 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 17:15:16,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-08-21 17:15:16,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96795cc97/de5f6b3bb0d84bf7b820b04c99e30c7a/FLAG70573b786 [2021-08-21 17:15:16,525 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 17:15:16,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-08-21 17:15:16,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96795cc97/de5f6b3bb0d84bf7b820b04c99e30c7a/FLAG70573b786 [2021-08-21 17:15:16,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96795cc97/de5f6b3bb0d84bf7b820b04c99e30c7a [2021-08-21 17:15:16,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:15:16,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 17:15:16,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 17:15:16,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 17:15:16,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 17:15:16,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:15:16" (1/1) ... [2021-08-21 17:15:16,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5003211b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:16, skipping insertion in model container [2021-08-21 17:15:16,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:15:16" (1/1) ... [2021-08-21 17:15:16,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 17:15:16,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 17:15:17,097 WARN L228 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] [2021-08-21 17:15:17,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 17:15:17,388 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 17:15:17,396 WARN L228 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] [2021-08-21 17:15:17,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 17:15:17,464 INFO L208 MainTranslator]: Completed translation [2021-08-21 17:15:17,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17 WrapperNode [2021-08-21 17:15:17,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 17:15:17,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:15:17,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:15:17,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:15:17,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:15:17,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:15:17,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:15:17,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:15:17,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:15:17,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:15:17,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:15:17,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:15:17,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:15:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:17,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 17:15:17,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 17:15:17,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 17:15:17,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 17:15:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-21 17:15:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 17:15:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-08-21 17:15:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-08-21 17:15:17,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-08-21 17:15:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 17:15:17,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:15:17,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:15:17,566 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:15:17,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:15:17,902 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-21 17:15:17,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:15:17 BoogieIcfgContainer [2021-08-21 17:15:17,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:15:17,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:15:17,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:15:17,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:15:17,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:15:16" (1/3) ... [2021-08-21 17:15:17,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ea825a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:15:17, skipping insertion in model container [2021-08-21 17:15:17,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (2/3) ... [2021-08-21 17:15:17,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ea825a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:15:17, skipping insertion in model container [2021-08-21 17:15:17,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:15:17" (3/3) ... [2021-08-21 17:15:17,919 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-08-21 17:15:17,922 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:15:17,922 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:15:17,922 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:15:17,922 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,951 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,952 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,953 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,954 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,955 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,957 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,957 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,957 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,957 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,958 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,958 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,958 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,958 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,958 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:17,976 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-08-21 17:15:18,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:15:18,023 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 17:15:18,023 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-21 17:15:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 331 states have (on average 1.29607250755287) internal successors, (429), 347 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 17:15:18,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:18,169 INFO L512 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] [2021-08-21 17:15:18,169 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1125005046, now seen corresponding path program 1 times [2021-08-21 17:15:18,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:18,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372141661] [2021-08-21 17:15:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:18,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:18,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:18,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372141661] [2021-08-21 17:15:18,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372141661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:18,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:15:18,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:15:18,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315498846] [2021-08-21 17:15:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-21 17:15:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-21 17:15:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-21 17:15:18,390 INFO L87 Difference]: Start difference. First operand has 348 states, 331 states have (on average 1.29607250755287) internal successors, (429), 347 states have internal predecessors, (429), 0 states have call successors, (0), 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) [2021-08-21 17:15:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:18,412 INFO L93 Difference]: Finished difference Result 346 states and 403 transitions. [2021-08-21 17:15:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-21 17:15:18,414 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 [2021-08-21 17:15:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:18,422 INFO L225 Difference]: With dead ends: 346 [2021-08-21 17:15:18,422 INFO L226 Difference]: Without dead ends: 197 [2021-08-21 17:15:18,423 INFO L781 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 [2021-08-21 17:15:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-21 17:15:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-08-21 17:15:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.260204081632653) internal successors, (247), 196 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 247 transitions. [2021-08-21 17:15:18,477 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 247 transitions. Word has length 53 [2021-08-21 17:15:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:18,477 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 247 transitions. [2021-08-21 17:15:18,478 INFO L471 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) [2021-08-21 17:15:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 247 transitions. [2021-08-21 17:15:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 17:15:18,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:18,490 INFO L512 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] [2021-08-21 17:15:18,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:15:18,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash 681363384, now seen corresponding path program 1 times [2021-08-21 17:15:18,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:18,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355747037] [2021-08-21 17:15:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:18,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:18,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:18,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355747037] [2021-08-21 17:15:18,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355747037] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:18,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:15:18,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:15:18,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209250097] [2021-08-21 17:15:18,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:15:18,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:15:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:15:18,637 INFO L87 Difference]: Start difference. First operand 197 states and 247 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) [2021-08-21 17:15:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:18,674 INFO L93 Difference]: Finished difference Result 302 states and 387 transitions. [2021-08-21 17:15:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:15:18,675 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 [2021-08-21 17:15:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:18,678 INFO L225 Difference]: With dead ends: 302 [2021-08-21 17:15:18,678 INFO L226 Difference]: Without dead ends: 302 [2021-08-21 17:15:18,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:15:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-21 17:15:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 212. [2021-08-21 17:15:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.2654028436018958) internal successors, (267), 211 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 267 transitions. [2021-08-21 17:15:18,690 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 267 transitions. Word has length 53 [2021-08-21 17:15:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:18,690 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 267 transitions. [2021-08-21 17:15:18,690 INFO L471 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) [2021-08-21 17:15:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 267 transitions. [2021-08-21 17:15:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 17:15:18,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:18,691 INFO L512 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] [2021-08-21 17:15:18,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:15:18,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash 797661957, now seen corresponding path program 1 times [2021-08-21 17:15:18,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:18,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833301776] [2021-08-21 17:15:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:18,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:18,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:18,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833301776] [2021-08-21 17:15:18,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833301776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:18,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375950657] [2021-08-21 17:15:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:18,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:18,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:18,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 17:15:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-21 17:15:19,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:15:19,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375950657] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:19,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 17:15:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-21 17:15:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641670628] [2021-08-21 17:15:19,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:15:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:15:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:15:19,233 INFO L87 Difference]: Start difference. First operand 212 states and 267 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:19,251 INFO L93 Difference]: Finished difference Result 322 states and 421 transitions. [2021-08-21 17:15:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:15:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-08-21 17:15:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:19,253 INFO L225 Difference]: With dead ends: 322 [2021-08-21 17:15:19,253 INFO L226 Difference]: Without dead ends: 322 [2021-08-21 17:15:19,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:15:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-21 17:15:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 213. [2021-08-21 17:15:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.2641509433962264) internal successors, (268), 212 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 268 transitions. [2021-08-21 17:15:19,272 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 268 transitions. Word has length 61 [2021-08-21 17:15:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:19,273 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 268 transitions. [2021-08-21 17:15:19,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 268 transitions. [2021-08-21 17:15:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 17:15:19,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:19,274 INFO L512 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] [2021-08-21 17:15:19,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:19,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:19,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2109370127, now seen corresponding path program 1 times [2021-08-21 17:15:19,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:19,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264971152] [2021-08-21 17:15:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:19,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:19,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:19,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264971152] [2021-08-21 17:15:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264971152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:19,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226513453] [2021-08-21 17:15:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:19,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:19,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:19,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 17:15:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-21 17:15:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:19,737 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 [2021-08-21 17:15:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:19,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226513453] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:19,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 17:15:19,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-21 17:15:19,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323162365] [2021-08-21 17:15:19,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:15:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:15:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:15:19,812 INFO L87 Difference]: Start difference. First operand 213 states and 268 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) [2021-08-21 17:15:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:19,823 INFO L93 Difference]: Finished difference Result 195 states and 235 transitions. [2021-08-21 17:15:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:15:19,823 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 [2021-08-21 17:15:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:19,824 INFO L225 Difference]: With dead ends: 195 [2021-08-21 17:15:19,824 INFO L226 Difference]: Without dead ends: 174 [2021-08-21 17:15:19,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:15:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-21 17:15:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-08-21 17:15:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.2196531791907514) internal successors, (211), 173 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2021-08-21 17:15:19,827 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 72 [2021-08-21 17:15:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:19,827 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2021-08-21 17:15:19,828 INFO L471 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) [2021-08-21 17:15:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2021-08-21 17:15:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 17:15:19,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:19,828 INFO L512 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] [2021-08-21 17:15:19,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:20,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 17:15:20,045 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1007193751, now seen corresponding path program 2 times [2021-08-21 17:15:20,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:20,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376216443] [2021-08-21 17:15:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:20,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:20,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376216443] [2021-08-21 17:15:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376216443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626649193] [2021-08-21 17:15:20,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:15:20,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:20,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:20,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 17:15:20,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:15:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:20,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:15:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:20,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626649193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:20,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:20,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 17:15:20,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398295615] [2021-08-21 17:15:20,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:15:20,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:15:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:15:20,466 INFO L87 Difference]: Start difference. First operand 174 states and 211 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) [2021-08-21 17:15:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:20,692 INFO L93 Difference]: Finished difference Result 659 states and 840 transitions. [2021-08-21 17:15:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:15:20,692 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 [2021-08-21 17:15:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:20,694 INFO L225 Difference]: With dead ends: 659 [2021-08-21 17:15:20,694 INFO L226 Difference]: Without dead ends: 659 [2021-08-21 17:15:20,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:15:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-08-21 17:15:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 380. [2021-08-21 17:15:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.279683377308707) internal successors, (485), 379 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 485 transitions. [2021-08-21 17:15:20,701 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 485 transitions. Word has length 72 [2021-08-21 17:15:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:20,701 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 485 transitions. [2021-08-21 17:15:20,701 INFO L471 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) [2021-08-21 17:15:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 485 transitions. [2021-08-21 17:15:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-21 17:15:20,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:20,702 INFO L512 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] [2021-08-21 17:15:20,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 17:15:20,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:20,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1265961652, now seen corresponding path program 3 times [2021-08-21 17:15:20,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:20,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052404778] [2021-08-21 17:15:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:20,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 17:15:20,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:20,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052404778] [2021-08-21 17:15:20,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052404778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:20,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473332906] [2021-08-21 17:15:20,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:15:20,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:20,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:20,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:20,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 17:15:21,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:15:21,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:21,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:15:21,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 17:15:21,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473332906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:21,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:21,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 17:15:21,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670189420] [2021-08-21 17:15:21,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:15:21,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:15:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:15:21,459 INFO L87 Difference]: Start difference. First operand 380 states and 485 transitions. Second operand has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:22,171 INFO L93 Difference]: Finished difference Result 1094 states and 1403 transitions. [2021-08-21 17:15:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 17:15:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 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 [2021-08-21 17:15:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:22,176 INFO L225 Difference]: With dead ends: 1094 [2021-08-21 17:15:22,176 INFO L226 Difference]: Without dead ends: 1094 [2021-08-21 17:15:22,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:15:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-08-21 17:15:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 716. [2021-08-21 17:15:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.290909090909091) internal successors, (923), 715 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 923 transitions. [2021-08-21 17:15:22,191 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 923 transitions. Word has length 91 [2021-08-21 17:15:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:22,192 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 923 transitions. [2021-08-21 17:15:22,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 923 transitions. [2021-08-21 17:15:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 17:15:22,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:22,197 INFO L512 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] [2021-08-21 17:15:22,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:22,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:22,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash 475648655, now seen corresponding path program 4 times [2021-08-21 17:15:22,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:22,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115642435] [2021-08-21 17:15:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:22,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-21 17:15:22,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:22,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115642435] [2021-08-21 17:15:22,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115642435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:22,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812269209] [2021-08-21 17:15:22,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:15:22,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:22,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:22,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:22,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 17:15:22,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:15:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:15:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-21 17:15:23,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812269209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:23,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:23,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 17:15:23,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430319446] [2021-08-21 17:15:23,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:15:23,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:15:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:15:23,019 INFO L87 Difference]: Start difference. First operand 716 states and 923 transitions. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 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) [2021-08-21 17:15:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:24,735 INFO L93 Difference]: Finished difference Result 1645 states and 2116 transitions. [2021-08-21 17:15:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-08-21 17:15:24,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 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 110 [2021-08-21 17:15:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:24,742 INFO L225 Difference]: With dead ends: 1645 [2021-08-21 17:15:24,742 INFO L226 Difference]: Without dead ends: 1645 [2021-08-21 17:15:24,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6818 ImplicationChecksByTransitivity, 1588.1ms TimeCoverageRelationStatistics Valid=3531, Invalid=12725, Unknown=0, NotChecked=0, Total=16256 [2021-08-21 17:15:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-08-21 17:15:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1168. [2021-08-21 17:15:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.2947729220222794) internal successors, (1511), 1167 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1511 transitions. [2021-08-21 17:15:24,763 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1511 transitions. Word has length 110 [2021-08-21 17:15:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:24,764 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1511 transitions. [2021-08-21 17:15:24,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 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) [2021-08-21 17:15:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1511 transitions. [2021-08-21 17:15:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-21 17:15:24,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:24,766 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-21 17:15:24,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:24,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:24,981 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:24,982 INFO L82 PathProgramCache]: Analyzing trace with hash -82463630, now seen corresponding path program 5 times [2021-08-21 17:15:24,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:24,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064186815] [2021-08-21 17:15:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:24,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-08-21 17:15:25,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:25,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064186815] [2021-08-21 17:15:25,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064186815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:25,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333326849] [2021-08-21 17:15:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:15:25,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:25,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:25,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:25,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 17:15:25,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:15:25,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:15:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-21 17:15:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333326849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:25,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:25,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 17:15:25,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663271434] [2021-08-21 17:15:25,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:15:25,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:15:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:15:25,625 INFO L87 Difference]: Start difference. First operand 1168 states and 1511 transitions. Second operand has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:28,955 INFO L93 Difference]: Finished difference Result 2312 states and 2979 transitions. [2021-08-21 17:15:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-08-21 17:15:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-08-21 17:15:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:28,961 INFO L225 Difference]: With dead ends: 2312 [2021-08-21 17:15:28,961 INFO L226 Difference]: Without dead ends: 2312 [2021-08-21 17:15:28,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18727 ImplicationChecksByTransitivity, 3065.5ms TimeCoverageRelationStatistics Valid=8509, Invalid=33311, Unknown=0, NotChecked=0, Total=41820 [2021-08-21 17:15:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-08-21 17:15:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1736. [2021-08-21 17:15:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 1.2962536023054756) internal successors, (2249), 1735 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2249 transitions. [2021-08-21 17:15:28,993 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2249 transitions. Word has length 129 [2021-08-21 17:15:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:28,993 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2249 transitions. [2021-08-21 17:15:28,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2249 transitions. [2021-08-21 17:15:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-21 17:15:28,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:28,996 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-08-21 17:15:29,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:29,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:29,213 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2032490571, now seen corresponding path program 6 times [2021-08-21 17:15:29,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:29,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529477459] [2021-08-21 17:15:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:29,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 5 proven. 115 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-08-21 17:15:29,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:29,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529477459] [2021-08-21 17:15:29,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529477459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:29,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245576895] [2021-08-21 17:15:29,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:15:29,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:29,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:29,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:29,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 17:15:29,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:15:29,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:15:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 5 proven. 115 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-08-21 17:15:30,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245576895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:30,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:30,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-21 17:15:30,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184916608] [2021-08-21 17:15:30,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:15:30,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:30,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:15:30,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:15:30,018 INFO L87 Difference]: Start difference. First operand 1736 states and 2249 transitions. Second operand has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:30,128 INFO L93 Difference]: Finished difference Result 2407 states and 3114 transitions. [2021-08-21 17:15:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:15:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 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 148 [2021-08-21 17:15:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:30,135 INFO L225 Difference]: With dead ends: 2407 [2021-08-21 17:15:30,135 INFO L226 Difference]: Without dead ends: 2407 [2021-08-21 17:15:30,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:15:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-08-21 17:15:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2059. [2021-08-21 17:15:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 1.2968901846452867) internal successors, (2669), 2058 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2669 transitions. [2021-08-21 17:15:30,169 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2669 transitions. Word has length 148 [2021-08-21 17:15:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:30,169 INFO L470 AbstractCegarLoop]: Abstraction has 2059 states and 2669 transitions. [2021-08-21 17:15:30,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2669 transitions. [2021-08-21 17:15:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-21 17:15:30,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:30,174 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-08-21 17:15:30,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:30,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:30,395 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1380212869, now seen corresponding path program 7 times [2021-08-21 17:15:30,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:30,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642053877] [2021-08-21 17:15:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:30,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 5 proven. 171 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-08-21 17:15:30,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:30,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642053877] [2021-08-21 17:15:30,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642053877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:30,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570314002] [2021-08-21 17:15:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:15:30,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:30,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:30,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 17:15:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:15:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-08-21 17:15:31,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570314002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:31,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:31,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-08-21 17:15:31,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422830559] [2021-08-21 17:15:31,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:15:31,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:15:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:15:31,271 INFO L87 Difference]: Start difference. First operand 2059 states and 2669 transitions. Second operand has 26 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 26 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:39,231 INFO L93 Difference]: Finished difference Result 3512 states and 4532 transitions. [2021-08-21 17:15:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2021-08-21 17:15:39,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 26 states have internal predecessors, (190), 0 states have call successors, (0), 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 159 [2021-08-21 17:15:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:39,240 INFO L225 Difference]: With dead ends: 3512 [2021-08-21 17:15:39,240 INFO L226 Difference]: Without dead ends: 3512 [2021-08-21 17:15:39,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58291 ImplicationChecksByTransitivity, 7540.1ms TimeCoverageRelationStatistics Valid=23633, Invalid=99919, Unknown=0, NotChecked=0, Total=123552 [2021-08-21 17:15:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2021-08-21 17:15:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 2801. [2021-08-21 17:15:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2800 states have (on average 1.2971428571428572) internal successors, (3632), 2800 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3632 transitions. [2021-08-21 17:15:39,289 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3632 transitions. Word has length 159 [2021-08-21 17:15:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:39,289 INFO L470 AbstractCegarLoop]: Abstraction has 2801 states and 3632 transitions. [2021-08-21 17:15:39,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 26 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3632 transitions. [2021-08-21 17:15:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-08-21 17:15:39,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:39,295 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2021-08-21 17:15:39,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:39,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:15:39,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2016846648, now seen corresponding path program 8 times [2021-08-21 17:15:39,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:39,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670650151] [2021-08-21 17:15:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:39,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 6 proven. 238 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 17:15:39,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:39,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670650151] [2021-08-21 17:15:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670650151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:39,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675641620] [2021-08-21 17:15:39,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:15:39,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:39,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 17:15:40,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:15:40,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:15:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 6 proven. 238 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 17:15:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675641620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:40,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:40,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-21 17:15:40,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520447431] [2021-08-21 17:15:40,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:15:40,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:15:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:15:40,366 INFO L87 Difference]: Start difference. First operand 2801 states and 3632 transitions. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:40,510 INFO L93 Difference]: Finished difference Result 3593 states and 4652 transitions. [2021-08-21 17:15:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:15:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 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 178 [2021-08-21 17:15:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:40,519 INFO L225 Difference]: With dead ends: 3593 [2021-08-21 17:15:40,519 INFO L226 Difference]: Without dead ends: 3593 [2021-08-21 17:15:40,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:15:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-08-21 17:15:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3182. [2021-08-21 17:15:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.297390757623389) internal successors, (4127), 3181 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4127 transitions. [2021-08-21 17:15:40,561 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4127 transitions. Word has length 178 [2021-08-21 17:15:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:40,562 INFO L470 AbstractCegarLoop]: Abstraction has 3182 states and 4127 transitions. [2021-08-21 17:15:40,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4127 transitions. [2021-08-21 17:15:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-08-21 17:15:40,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:40,574 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-08-21 17:15:40,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:40,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:40,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2105292392, now seen corresponding path program 9 times [2021-08-21 17:15:40,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:40,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509138042] [2021-08-21 17:15:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:40,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 6 proven. 316 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-21 17:15:40,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:40,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509138042] [2021-08-21 17:15:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509138042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:40,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673923253] [2021-08-21 17:15:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:15:40,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:40,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 17:15:41,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:15:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:41,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:15:41,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 29 proven. 126 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-08-21 17:15:42,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673923253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:42,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:42,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-08-21 17:15:42,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457853965] [2021-08-21 17:15:42,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 17:15:42,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 17:15:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:15:42,049 INFO L87 Difference]: Start difference. First operand 3182 states and 4127 transitions. Second operand has 32 states, 32 states have (on average 6.875) internal successors, (220), 32 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:58,015 INFO L93 Difference]: Finished difference Result 4944 states and 6385 transitions. [2021-08-21 17:15:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 521 states. [2021-08-21 17:15:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.875) internal successors, (220), 32 states have internal predecessors, (220), 0 states have call successors, (0), 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 189 [2021-08-21 17:15:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:58,034 INFO L225 Difference]: With dead ends: 4944 [2021-08-21 17:15:58,034 INFO L226 Difference]: Without dead ends: 4944 [2021-08-21 17:15:58,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138769 ImplicationChecksByTransitivity, 15156.6ms TimeCoverageRelationStatistics Valid=52541, Invalid=233149, Unknown=0, NotChecked=0, Total=285690 [2021-08-21 17:15:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2021-08-21 17:15:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 4098. [2021-08-21 17:15:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.2972907005125702) internal successors, (5315), 4097 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 5315 transitions. [2021-08-21 17:15:58,170 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 5315 transitions. Word has length 189 [2021-08-21 17:15:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:58,170 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 5315 transitions. [2021-08-21 17:15:58,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.875) internal successors, (220), 32 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 5315 transitions. [2021-08-21 17:15:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-08-21 17:15:58,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:58,190 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-08-21 17:15:58,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 17:15:58,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 17:15:58,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1427033819, now seen corresponding path program 10 times [2021-08-21 17:15:58,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:58,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430789320] [2021-08-21 17:15:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:58,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 7 proven. 405 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-08-21 17:15:58,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:58,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430789320] [2021-08-21 17:15:58,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430789320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:58,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370381249] [2021-08-21 17:15:58,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:15:58,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:58,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:15:58,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 17:15:59,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:15:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:59,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:15:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 33 proven. 175 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-08-21 17:15:59,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370381249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:59,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-08-21 17:15:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728998385] [2021-08-21 17:15:59,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 17:15:59,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 17:15:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:15:59,863 INFO L87 Difference]: Start difference. First operand 4098 states and 5315 transitions. Second operand has 36 states, 36 states have (on average 6.638888888888889) internal successors, (239), 36 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:16:22,835 INFO L93 Difference]: Finished difference Result 6075 states and 7848 transitions. [2021-08-21 17:16:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 668 states. [2021-08-21 17:16:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.638888888888889) internal successors, (239), 36 states have internal predecessors, (239), 0 states have call successors, (0), 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 208 [2021-08-21 17:16:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:16:22,859 INFO L225 Difference]: With dead ends: 6075 [2021-08-21 17:16:22,859 INFO L226 Difference]: Without dead ends: 6075 [2021-08-21 17:16:22,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 682 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230185 ImplicationChecksByTransitivity, 21957.0ms TimeCoverageRelationStatistics Valid=84141, Invalid=383031, Unknown=0, NotChecked=0, Total=467172 [2021-08-21 17:16:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2021-08-21 17:16:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 5130. [2021-08-21 17:16:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 1.297133944238643) internal successors, (6653), 5129 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6653 transitions. [2021-08-21 17:16:23,008 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6653 transitions. Word has length 208 [2021-08-21 17:16:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:16:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 5130 states and 6653 transitions. [2021-08-21 17:16:23,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.638888888888889) internal successors, (239), 36 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6653 transitions. [2021-08-21 17:16:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-08-21 17:16:23,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:16:23,016 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2021-08-21 17:16:23,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:16:23,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 17:16:23,245 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:16:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:16:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1745612990, now seen corresponding path program 11 times [2021-08-21 17:16:23,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:16:23,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415815106] [2021-08-21 17:16:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:16:23,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:16:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 8 proven. 505 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-08-21 17:16:23,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:16:23,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415815106] [2021-08-21 17:16:23,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415815106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:23,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607576194] [2021-08-21 17:16:23,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:16:23,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:16:23,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:16:23,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 17:16:24,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 17:16:24,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:16:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:16:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 37 proven. 232 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-08-21 17:16:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607576194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:24,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 40 [2021-08-21 17:16:24,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733516300] [2021-08-21 17:16:24,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 17:16:24,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 17:16:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:16:24,583 INFO L87 Difference]: Start difference. First operand 5130 states and 6653 transitions. Second operand has 40 states, 40 states have (on average 6.45) internal successors, (258), 40 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:16:52,796 INFO L93 Difference]: Finished difference Result 7322 states and 9461 transitions. [2021-08-21 17:16:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 833 states. [2021-08-21 17:16:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.45) internal successors, (258), 40 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-08-21 17:16:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:16:52,807 INFO L225 Difference]: With dead ends: 7322 [2021-08-21 17:16:52,807 INFO L226 Difference]: Without dead ends: 7322 [2021-08-21 17:16:52,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1175 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 849 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360322 ImplicationChecksByTransitivity, 26961.6ms TimeCoverageRelationStatistics Valid=128109, Invalid=595241, Unknown=0, NotChecked=0, Total=723350 [2021-08-21 17:16:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-08-21 17:16:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6278. [2021-08-21 17:16:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6278 states, 6277 states have (on average 1.2969571451330253) internal successors, (8141), 6277 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 8141 transitions. [2021-08-21 17:16:52,932 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 8141 transitions. Word has length 227 [2021-08-21 17:16:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:16:52,932 INFO L470 AbstractCegarLoop]: Abstraction has 6278 states and 8141 transitions. [2021-08-21 17:16:52,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.45) internal successors, (258), 40 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 8141 transitions. [2021-08-21 17:16:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-08-21 17:16:52,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:16:52,945 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2021-08-21 17:16:52,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 17:16:53,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 17:16:53,160 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:16:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:16:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash 966659073, now seen corresponding path program 12 times [2021-08-21 17:16:53,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:16:53,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069372339] [2021-08-21 17:16:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:16:53,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:16:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 9 proven. 616 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-08-21 17:16:53,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:16:53,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069372339] [2021-08-21 17:16:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069372339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:53,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952813289] [2021-08-21 17:16:53,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:16:53,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:53,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:16:53,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:16:53,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 17:16:54,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 17:16:54,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:16:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:16:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 9 proven. 616 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-08-21 17:16:55,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952813289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:55,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:55,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-21 17:16:55,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529957150] [2021-08-21 17:16:55,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:16:55,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:16:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:16:55,174 INFO L87 Difference]: Start difference. First operand 6278 states and 8141 transitions. Second operand has 27 states, 27 states have (on average 7.185185185185185) internal successors, (194), 27 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:16:55,503 INFO L93 Difference]: Finished difference Result 7433 states and 9626 transitions. [2021-08-21 17:16:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:16:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.185185185185185) internal successors, (194), 27 states have internal predecessors, (194), 0 states have call successors, (0), 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 246 [2021-08-21 17:16:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:16:55,535 INFO L225 Difference]: With dead ends: 7433 [2021-08-21 17:16:55,535 INFO L226 Difference]: Without dead ends: 7433 [2021-08-21 17:16:55,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:16:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7433 states. [2021-08-21 17:16:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7433 to 6833. [2021-08-21 17:16:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6833 states, 6832 states have (on average 1.2969847775175645) internal successors, (8861), 6832 states have internal predecessors, (8861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6833 states to 6833 states and 8861 transitions. [2021-08-21 17:16:55,681 INFO L78 Accepts]: Start accepts. Automaton has 6833 states and 8861 transitions. Word has length 246 [2021-08-21 17:16:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:16:55,681 INFO L470 AbstractCegarLoop]: Abstraction has 6833 states and 8861 transitions. [2021-08-21 17:16:55,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.185185185185185) internal successors, (194), 27 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6833 states and 8861 transitions. [2021-08-21 17:16:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-08-21 17:16:55,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:16:55,720 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2021-08-21 17:16:55,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 17:16:55,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 17:16:55,953 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:16:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:16:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -232320815, now seen corresponding path program 13 times [2021-08-21 17:16:55,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:16:55,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940717663] [2021-08-21 17:16:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:16:55,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:16:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 9 proven. 738 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-08-21 17:16:56,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:16:56,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940717663] [2021-08-21 17:16:56,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940717663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:56,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530039318] [2021-08-21 17:16:56,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:16:56,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:56,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:16:56,239 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:16:56,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 17:16:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:16:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 45 proven. 297 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2021-08-21 17:16:57,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530039318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:57,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:57,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 46 [2021-08-21 17:16:57,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554013897] [2021-08-21 17:16:57,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 17:16:57,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 17:16:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:16:57,876 INFO L87 Difference]: Start difference. First operand 6833 states and 8861 transitions. Second operand has 46 states, 46 states have (on average 6.260869565217392) internal successors, (288), 46 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:17:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:17:57,488 INFO L93 Difference]: Finished difference Result 9334 states and 12064 transitions. [2021-08-21 17:17:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1103 states. [2021-08-21 17:17:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.260869565217392) internal successors, (288), 46 states have internal predecessors, (288), 0 states have call successors, (0), 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 257 [2021-08-21 17:17:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:17:57,522 INFO L225 Difference]: With dead ends: 9334 [2021-08-21 17:17:57,522 INFO L226 Difference]: Without dead ends: 9334 [2021-08-21 17:17:57,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1509 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636043 ImplicationChecksByTransitivity, 57366.0ms TimeCoverageRelationStatistics Valid=219426, Invalid=1042826, Unknown=0, NotChecked=0, Total=1262252 [2021-08-21 17:17:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9334 states. [2021-08-21 17:17:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9334 to 8155. [2021-08-21 17:17:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8155 states, 8154 states have (on average 1.2967868530782438) internal successors, (10574), 8154 states have internal predecessors, (10574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:17:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8155 states to 8155 states and 10574 transitions. [2021-08-21 17:17:57,808 INFO L78 Accepts]: Start accepts. Automaton has 8155 states and 10574 transitions. Word has length 257 [2021-08-21 17:17:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:17:57,808 INFO L470 AbstractCegarLoop]: Abstraction has 8155 states and 10574 transitions. [2021-08-21 17:17:57,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.260869565217392) internal successors, (288), 46 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:17:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8155 states and 10574 transitions. [2021-08-21 17:17:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-08-21 17:17:57,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:17:57,820 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2021-08-21 17:17:57,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 17:17:58,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:17:58,020 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:17:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:17:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 712127764, now seen corresponding path program 14 times [2021-08-21 17:17:58,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:17:58,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873081891] [2021-08-21 17:17:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:17:58,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:17:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:17:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 10 proven. 871 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-08-21 17:17:58,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:17:58,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873081891] [2021-08-21 17:17:58,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873081891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:17:58,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464045178] [2021-08-21 17:17:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:17:58,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:17:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:17:58,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:17:58,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 17:17:59,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:17:59,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:17:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:17:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:18:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 10 proven. 871 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-08-21 17:18:00,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464045178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:18:00,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:18:00,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-08-21 17:18:00,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727491003] [2021-08-21 17:18:00,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:18:00,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:18:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:18:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:18:00,013 INFO L87 Difference]: Start difference. First operand 8155 states and 10574 transitions. Second operand has 31 states, 31 states have (on average 6.967741935483871) internal successors, (216), 31 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:18:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:18:00,667 INFO L93 Difference]: Finished difference Result 9431 states and 12214 transitions. [2021-08-21 17:18:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:18:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.967741935483871) internal successors, (216), 31 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2021-08-21 17:18:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:18:00,679 INFO L225 Difference]: With dead ends: 9431 [2021-08-21 17:18:00,679 INFO L226 Difference]: Without dead ends: 9431 [2021-08-21 17:18:00,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 793.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:18:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9431 states. [2021-08-21 17:18:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9431 to 8768. [2021-08-21 17:18:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8768 states, 8767 states have (on average 1.2967947986768564) internal successors, (11369), 8767 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:18:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8768 states to 8768 states and 11369 transitions. [2021-08-21 17:18:00,769 INFO L78 Accepts]: Start accepts. Automaton has 8768 states and 11369 transitions. Word has length 276 [2021-08-21 17:18:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:18:00,770 INFO L470 AbstractCegarLoop]: Abstraction has 8768 states and 11369 transitions. [2021-08-21 17:18:00,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.967741935483871) internal successors, (216), 31 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:18:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 8768 states and 11369 transitions. [2021-08-21 17:18:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-08-21 17:18:00,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:18:00,783 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2021-08-21 17:18:00,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 17:18:01,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 17:18:01,002 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:18:01,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:18:01,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1384190492, now seen corresponding path program 15 times [2021-08-21 17:18:01,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:18:01,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678653890] [2021-08-21 17:18:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:18:01,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:18:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:18:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 10 proven. 1015 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-08-21 17:18:01,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:18:01,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678653890] [2021-08-21 17:18:01,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678653890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:18:01,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111475828] [2021-08-21 17:18:01,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:18:01,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:18:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:18:01,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:18:01,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 17:18:02,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 17:18:02,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:18:02,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:18:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:18:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 53 proven. 370 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2021-08-21 17:18:03,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111475828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:18:03,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:18:03,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23] total 52 [2021-08-21 17:18:03,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198333264] [2021-08-21 17:18:03,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 17:18:03,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:18:03,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 17:18:03,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2255, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:18:03,678 INFO L87 Difference]: Start difference. First operand 8768 states and 11369 transitions. Second operand has 52 states, 52 states have (on average 6.115384615384615) internal successors, (318), 52 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:19:27,960 INFO L93 Difference]: Finished difference Result 11578 states and 14967 transitions. [2021-08-21 17:19:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1409 states. [2021-08-21 17:19:27,960 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.115384615384615) internal successors, (318), 52 states have internal predecessors, (318), 0 states have call successors, (0), 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 287 [2021-08-21 17:19:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:19:27,971 INFO L225 Difference]: With dead ends: 11578 [2021-08-21 17:19:27,971 INFO L226 Difference]: Without dead ends: 11578 [2021-08-21 17:19:28,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1883 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042941 ImplicationChecksByTransitivity, 80536.7ms TimeCoverageRelationStatistics Valid=351576, Invalid=1700480, Unknown=0, NotChecked=0, Total=2052056 [2021-08-21 17:19:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11578 states. [2021-08-21 17:19:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11578 to 10264. [2021-08-21 17:19:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10264 states, 10263 states have (on average 1.2965994348631005) internal successors, (13307), 10263 states have internal predecessors, (13307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10264 states to 10264 states and 13307 transitions. [2021-08-21 17:19:28,370 INFO L78 Accepts]: Start accepts. Automaton has 10264 states and 13307 transitions. Word has length 287 [2021-08-21 17:19:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:19:28,370 INFO L470 AbstractCegarLoop]: Abstraction has 10264 states and 13307 transitions. [2021-08-21 17:19:28,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.115384615384615) internal successors, (318), 52 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 10264 states and 13307 transitions. [2021-08-21 17:19:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-08-21 17:19:28,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:19:28,387 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2021-08-21 17:19:28,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 17:19:28,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 17:19:28,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:19:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:19:28,604 INFO L82 PathProgramCache]: Analyzing trace with hash 654908199, now seen corresponding path program 16 times [2021-08-21 17:19:28,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:19:28,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289529297] [2021-08-21 17:19:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:19:28,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:19:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:19:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 11 proven. 1170 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-08-21 17:19:28,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:19:28,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289529297] [2021-08-21 17:19:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289529297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:28,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325423724] [2021-08-21 17:19:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:19:28,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:19:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:19:28,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:19:28,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 17:19:30,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:19:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:19:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:19:30,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:19:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 57 proven. 451 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2021-08-21 17:19:31,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325423724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:31,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:19:31,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25] total 56 [2021-08-21 17:19:31,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332281197] [2021-08-21 17:19:31,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-21 17:19:31,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:19:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-21 17:19:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=2625, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 17:19:31,022 INFO L87 Difference]: Start difference. First operand 10264 states and 13307 transitions. Second operand has 56 states, 56 states have (on average 6.017857142857143) internal successors, (337), 56 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:21:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:21:42,993 INFO L93 Difference]: Finished difference Result 13289 states and 17180 transitions. [2021-08-21 17:21:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1646 states. [2021-08-21 17:21:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 6.017857142857143) internal successors, (337), 56 states have internal predecessors, (337), 0 states have call successors, (0), 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 306 [2021-08-21 17:21:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:21:43,021 INFO L225 Difference]: With dead ends: 13289 [2021-08-21 17:21:43,021 INFO L226 Difference]: Without dead ends: 13289 [2021-08-21 17:21:43,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2168 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1670 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427225 ImplicationChecksByTransitivity, 126646.4ms TimeCoverageRelationStatistics Valid=474443, Invalid=2319469, Unknown=0, NotChecked=0, Total=2793912 [2021-08-21 17:21:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13289 states. [2021-08-21 17:21:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13289 to 11876. [2021-08-21 17:21:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11876 states, 11875 states have (on average 1.296421052631579) internal successors, (15395), 11875 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:21:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11876 states to 11876 states and 15395 transitions. [2021-08-21 17:21:43,318 INFO L78 Accepts]: Start accepts. Automaton has 11876 states and 15395 transitions. Word has length 306 [2021-08-21 17:21:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:21:43,319 INFO L470 AbstractCegarLoop]: Abstraction has 11876 states and 15395 transitions. [2021-08-21 17:21:43,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.017857142857143) internal successors, (337), 56 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:21:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 11876 states and 15395 transitions. [2021-08-21 17:21:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-08-21 17:21:43,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:21:43,337 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2021-08-21 17:21:43,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:21:43,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:21:43,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:21:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:21:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash -108757750, now seen corresponding path program 17 times [2021-08-21 17:21:43,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:21:43,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103026434] [2021-08-21 17:21:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:21:43,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:21:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:21:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1876 backedges. 12 proven. 1336 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-08-21 17:21:44,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:21:44,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103026434] [2021-08-21 17:21:44,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103026434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:21:44,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446064666] [2021-08-21 17:21:44,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:21:44,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:21:44,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:21:44,286 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:21:44,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 17:21:45,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 17:21:45,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:21:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:21:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:21:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1876 backedges. 61 proven. 540 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2021-08-21 17:21:46,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446064666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:21:46,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:21:46,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27] total 60 [2021-08-21 17:21:46,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957589984] [2021-08-21 17:21:46,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-21 17:21:46,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:21:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-21 17:21:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=3023, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:21:46,749 INFO L87 Difference]: Start difference. First operand 11876 states and 15395 transitions. Second operand has 60 states, 60 states have (on average 5.933333333333334) internal successors, (356), 60 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:24:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:24:43,567 INFO L93 Difference]: Finished difference Result 15116 states and 19543 transitions. [2021-08-21 17:24:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1901 states. [2021-08-21 17:24:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.933333333333334) internal successors, (356), 60 states have internal predecessors, (356), 0 states have call successors, (0), 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 325 [2021-08-21 17:24:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:24:43,587 INFO L225 Difference]: With dead ends: 15116 [2021-08-21 17:24:43,587 INFO L226 Difference]: Without dead ends: 15116 [2021-08-21 17:24:43,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2473 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 1927 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908034 ImplicationChecksByTransitivity, 168864.4ms TimeCoverageRelationStatistics Valid=626721, Invalid=3092391, Unknown=0, NotChecked=0, Total=3719112 [2021-08-21 17:24:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15116 states. [2021-08-21 17:24:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15116 to 13604. [2021-08-21 17:24:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13604 states, 13603 states have (on average 1.2962581783430125) internal successors, (17633), 13603 states have internal predecessors, (17633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:24:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13604 states to 13604 states and 17633 transitions. [2021-08-21 17:24:44,111 INFO L78 Accepts]: Start accepts. Automaton has 13604 states and 17633 transitions. Word has length 325 [2021-08-21 17:24:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:24:44,111 INFO L470 AbstractCegarLoop]: Abstraction has 13604 states and 17633 transitions. [2021-08-21 17:24:44,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.933333333333334) internal successors, (356), 60 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:24:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 13604 states and 17633 transitions. [2021-08-21 17:24:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-08-21 17:24:44,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:24:44,128 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2021-08-21 17:24:44,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 17:24:44,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:24:44,350 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:24:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:24:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2031697843, now seen corresponding path program 18 times [2021-08-21 17:24:44,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:24:44,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524593037] [2021-08-21 17:24:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:24:44,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:24:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:24:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 13 proven. 1513 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-08-21 17:24:44,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:24:44,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524593037] [2021-08-21 17:24:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524593037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:24:44,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289239344] [2021-08-21 17:24:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:24:44,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:24:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:24:44,810 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:24:44,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 17:24:46,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 17:24:46,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:24:46,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 17:24:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:24:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 13 proven. 1513 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-08-21 17:24:47,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289239344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:24:47,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:24:47,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-08-21 17:24:47,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524564478] [2021-08-21 17:24:47,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 17:24:47,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:24:47,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 17:24:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:24:47,373 INFO L87 Difference]: Start difference. First operand 13604 states and 17633 transitions. Second operand has 39 states, 39 states have (on average 6.666666666666667) internal successors, (260), 39 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:24:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:24:48,033 INFO L93 Difference]: Finished difference Result 15243 states and 19738 transitions. [2021-08-21 17:24:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 17:24:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.666666666666667) internal successors, (260), 39 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2021-08-21 17:24:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:24:48,049 INFO L225 Difference]: With dead ends: 15243 [2021-08-21 17:24:48,050 INFO L226 Difference]: Without dead ends: 15243 [2021-08-21 17:24:48,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 867.2ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 17:24:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-08-21 17:24:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 14391. [2021-08-21 17:24:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14391 states, 14390 states have (on average 1.2962473940236274) internal successors, (18653), 14390 states have internal predecessors, (18653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:24:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14391 states to 14391 states and 18653 transitions. [2021-08-21 17:24:48,215 INFO L78 Accepts]: Start accepts. Automaton has 14391 states and 18653 transitions. Word has length 344 [2021-08-21 17:24:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:24:48,215 INFO L470 AbstractCegarLoop]: Abstraction has 14391 states and 18653 transitions. [2021-08-21 17:24:48,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.666666666666667) internal successors, (260), 39 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:24:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14391 states and 18653 transitions. [2021-08-21 17:24:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-08-21 17:24:48,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:24:48,233 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2021-08-21 17:24:48,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 17:24:48,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:24:48,452 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:24:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:24:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash -178515683, now seen corresponding path program 19 times [2021-08-21 17:24:48,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:24:48,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847558596] [2021-08-21 17:24:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:24:48,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:24:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:24:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 13 proven. 1701 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-08-21 17:24:49,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:24:49,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847558596] [2021-08-21 17:24:49,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847558596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:24:49,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518761760] [2021-08-21 17:24:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:24:49,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:24:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:24:49,068 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:24:49,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 17:24:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:24:50,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:24:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:24:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 69 proven. 637 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-08-21 17:24:52,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518761760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:24:52,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:24:52,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 29] total 66 [2021-08-21 17:24:52,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042062129] [2021-08-21 17:24:52,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-21 17:24:52,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:24:52,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-21 17:24:52,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=3668, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 17:24:52,086 INFO L87 Difference]: Start difference. First operand 14391 states and 18653 transitions. Second operand has 66 states, 66 states have (on average 5.848484848484849) internal successors, (386), 66 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)