/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-atomic/peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 23:59:48,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 23:59:48,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 23:59:48,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 23:59:48,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 23:59:48,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 23:59:48,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 23:59:48,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 23:59:48,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 23:59:48,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 23:59:48,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 23:59:48,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 23:59:48,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 23:59:48,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 23:59:48,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 23:59:48,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 23:59:48,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 23:59:48,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 23:59:48,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 23:59:48,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 23:59:48,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 23:59:48,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 23:59:48,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 23:59:48,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 23:59:48,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 23:59:48,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 23:59:48,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 23:59:48,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 23:59:48,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 23:59:48,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 23:59:48,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 23:59:48,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 23:59:48,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 23:59:48,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 23:59:48,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 23:59:48,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 23:59:48,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 23:59:48,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 23:59:48,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 23:59:48,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 23:59:48,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 23:59:48,701 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 [2021-07-13 23:59:48,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 23:59:48,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 23:59:48,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 23:59:48,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 23:59:48,723 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 23:59:48,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 23:59:48,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 23:59:48,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 23:59:48,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 23:59:48,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 23:59:48,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 23:59:48,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 23:59:48,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 23:59:48,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 23:59:48,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 23:59:48,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 23:59:48,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 23:59:48,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 23:59:48,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 23:59:48,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 23:59:48,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 23:59:48,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 23:59:48,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 23:59:48,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-07-13 23:59:48,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 23:59:48,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 23:59:49,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 23:59:49,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 23:59:49,017 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 23:59:49,017 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 23:59:49,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2021-07-13 23:59:49,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f8c07c60/8b42235fed08419a80117d9e6854e2f0/FLAGa2f87d6c7 [2021-07-13 23:59:49,577 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 23:59:49,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2021-07-13 23:59:49,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f8c07c60/8b42235fed08419a80117d9e6854e2f0/FLAGa2f87d6c7 [2021-07-13 23:59:50,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f8c07c60/8b42235fed08419a80117d9e6854e2f0 [2021-07-13 23:59:50,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 23:59:50,071 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 23:59:50,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 23:59:50,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 23:59:50,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 23:59:50,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1feeef00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50, skipping insertion in model container [2021-07-13 23:59:50,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 23:59:50,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 23:59:50,359 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-13 23:59:50,499 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[30997,31010] [2021-07-13 23:59:50,506 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[31682,31695] [2021-07-13 23:59:50,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 23:59:50,521 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 23:59:50,546 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-13 23:59:50,567 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[30997,31010] [2021-07-13 23:59:50,569 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[31682,31695] [2021-07-13 23:59:50,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 23:59:50,607 INFO L208 MainTranslator]: Completed translation [2021-07-13 23:59:50,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50 WrapperNode [2021-07-13 23:59:50,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 23:59:50,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 23:59:50,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 23:59:50,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 23:59:50,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 23:59:50,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 23:59:50,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 23:59:50,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 23:59:50,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... [2021-07-13 23:59:50,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 23:59:50,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 23:59:50,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 23:59:50,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 23:59:50,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 23:59:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 23:59:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-07-13 23:59:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-07-13 23:59:50,769 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-07-13 23:59:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-07-13 23:59:50,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 23:59:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-13 23:59:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 23:59:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 23:59:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 23:59:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-13 23:59:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 23:59:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 23:59:50,771 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 23:59:51,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 23:59:51,175 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-13 23:59:51,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:59:51 BoogieIcfgContainer [2021-07-13 23:59:51,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 23:59:51,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 23:59:51,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 23:59:51,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 23:59:51,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:59:50" (1/3) ... [2021-07-13 23:59:51,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41049c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:59:51, skipping insertion in model container [2021-07-13 23:59:51,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:59:50" (2/3) ... [2021-07-13 23:59:51,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41049c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:59:51, skipping insertion in model container [2021-07-13 23:59:51,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:59:51" (3/3) ... [2021-07-13 23:59:51,183 INFO L111 eAbstractionObserver]: Analyzing ICFG peterson.i [2021-07-13 23:59:51,187 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 23:59:51,187 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 23:59:51,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-13 23:59:51,188 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 23:59:51,207 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,208 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,208 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,208 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,208 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,208 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,208 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,209 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,209 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,209 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,209 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,209 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,210 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,210 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,210 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,210 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,210 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,210 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,211 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,211 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,211 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,211 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,211 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,212 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,212 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,212 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,212 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,212 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,213 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,213 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,213 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,213 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,213 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,214 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,214 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,214 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,214 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,214 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,214 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,215 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,215 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,215 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,215 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,215 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,215 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,216 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,216 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,216 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,216 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,216 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,216 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,217 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,217 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,217 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,217 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,217 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,219 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,219 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,219 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,220 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,220 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,220 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,224 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,224 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,224 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,224 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,224 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,225 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 23:59:51,231 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 23:59:51,249 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 23:59:51,264 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 23:59:51,264 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 23:59:51,264 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 23:59:51,264 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 23:59:51,265 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 23:59:51,265 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 23:59:51,265 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 23:59:51,265 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-07-13 23:59:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 799 states have (on average 1.6470588235294117) internal successors, (1316), 894 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 23:59:51,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:51,459 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:51,459 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -11332315, now seen corresponding path program 1 times [2021-07-13 23:59:51,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:51,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558145789] [2021-07-13 23:59:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:51,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:51,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:51,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:51,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558145789] [2021-07-13 23:59:51,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558145789] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:51,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:51,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 23:59:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574764932] [2021-07-13 23:59:51,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-13 23:59:51,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-13 23:59:51,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 23:59:51,688 INFO L87 Difference]: Start difference. First operand has 895 states, 799 states have (on average 1.6470588235294117) internal successors, (1316), 894 states have internal predecessors, (1316), 0 states have call successors, (0), 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 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:51,712 INFO L93 Difference]: Finished difference Result 895 states and 1195 transitions. [2021-07-13 23:59:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-13 23:59:51,713 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-07-13 23:59:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:51,726 INFO L225 Difference]: With dead ends: 895 [2021-07-13 23:59:51,727 INFO L226 Difference]: Without dead ends: 601 [2021-07-13 23:59:51,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 23:59:51,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-13 23:59:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-07-13 23:59:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 593 states have (on average 1.5126475548060707) internal successors, (897), 600 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 897 transitions. [2021-07-13 23:59:51,784 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 897 transitions. Word has length 28 [2021-07-13 23:59:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:51,784 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 897 transitions. [2021-07-13 23:59:51,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 897 transitions. [2021-07-13 23:59:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 23:59:51,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:51,785 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:51,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 23:59:51,786 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash -11302524, now seen corresponding path program 1 times [2021-07-13 23:59:51,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:51,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313934735] [2021-07-13 23:59:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:51,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:51,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-13 23:59:51,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:51,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:51,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313934735] [2021-07-13 23:59:51,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313934735] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:51,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:51,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 23:59:51,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028102526] [2021-07-13 23:59:51,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 23:59:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 23:59:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 23:59:51,854 INFO L87 Difference]: Start difference. First operand 601 states and 897 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:51,873 INFO L93 Difference]: Finished difference Result 525 states and 757 transitions. [2021-07-13 23:59:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 23:59:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-07-13 23:59:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:51,877 INFO L225 Difference]: With dead ends: 525 [2021-07-13 23:59:51,877 INFO L226 Difference]: Without dead ends: 421 [2021-07-13 23:59:51,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 23:59:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-13 23:59:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-07-13 23:59:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.523002421307506) internal successors, (629), 420 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 629 transitions. [2021-07-13 23:59:51,904 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 629 transitions. Word has length 28 [2021-07-13 23:59:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:51,904 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 629 transitions. [2021-07-13 23:59:51,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 629 transitions. [2021-07-13 23:59:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 23:59:51,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:51,907 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:51,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 23:59:51,907 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1989593698, now seen corresponding path program 1 times [2021-07-13 23:59:51,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:51,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915767580] [2021-07-13 23:59:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:51,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:51,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:51,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-13 23:59:52,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:52,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:52,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915767580] [2021-07-13 23:59:52,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915767580] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:52,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 23:59:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312072233] [2021-07-13 23:59:52,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 23:59:52,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:52,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 23:59:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 23:59:52,091 INFO L87 Difference]: Start difference. First operand 421 states and 629 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:52,249 INFO L93 Difference]: Finished difference Result 545 states and 853 transitions. [2021-07-13 23:59:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 23:59:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-07-13 23:59:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:52,253 INFO L225 Difference]: With dead ends: 545 [2021-07-13 23:59:52,253 INFO L226 Difference]: Without dead ends: 371 [2021-07-13 23:59:52,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 23:59:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-13 23:59:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 347. [2021-07-13 23:59:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 339 states have (on average 1.5427728613569323) internal successors, (523), 346 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 523 transitions. [2021-07-13 23:59:52,263 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 523 transitions. Word has length 41 [2021-07-13 23:59:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:52,263 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 523 transitions. [2021-07-13 23:59:52,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 523 transitions. [2021-07-13 23:59:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 23:59:52,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:52,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:52,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 23:59:52,266 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash 791757058, now seen corresponding path program 2 times [2021-07-13 23:59:52,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:52,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26299993] [2021-07-13 23:59:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:52,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-13 23:59:52,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,367 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:52,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:52,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26299993] [2021-07-13 23:59:52,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26299993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:52,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:52,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 23:59:52,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56808702] [2021-07-13 23:59:52,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 23:59:52,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:52,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 23:59:52,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 23:59:52,380 INFO L87 Difference]: Start difference. First operand 347 states and 523 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:52,443 INFO L93 Difference]: Finished difference Result 288 states and 456 transitions. [2021-07-13 23:59:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 23:59:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-07-13 23:59:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:52,444 INFO L225 Difference]: With dead ends: 288 [2021-07-13 23:59:52,444 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 23:59:52,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 23:59:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 23:59:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 23:59:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 23:59:52,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-07-13 23:59:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:52,445 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 23:59:52,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 23:59:52,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 23:59:52,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 23:59:52,446 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (1/3) [2021-07-13 23:59:52,448 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 23:59:52,449 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 23:59:52,449 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 23:59:52,449 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 23:59:52,449 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 23:59:52,449 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 23:59:52,449 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 23:59:52,449 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 23:59:52,450 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 23:59:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 23:59:52,459 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/3) [2021-07-13 23:59:52,459 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 23:59:52,461 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 23:59:52,461 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 23:59:52,461 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 23:59:52,461 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 23:59:52,461 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 23:59:52,461 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 23:59:52,461 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 23:59:52,461 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork1======== [2021-07-13 23:59:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 919 states, 844 states have (on average 2.0841232227488153) internal successors, (1759), 918 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 23:59:52,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:52,545 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:52,545 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash -679138925, now seen corresponding path program 1 times [2021-07-13 23:59:52,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:52,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168541798] [2021-07-13 23:59:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:52,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:52,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:52,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168541798] [2021-07-13 23:59:52,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168541798] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:52,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:52,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 23:59:52,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215168508] [2021-07-13 23:59:52,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-13 23:59:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-13 23:59:52,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 23:59:52,572 INFO L87 Difference]: Start difference. First operand has 919 states, 844 states have (on average 2.0841232227488153) internal successors, (1759), 918 states have internal predecessors, (1759), 0 states have call successors, (0), 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 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:52,578 INFO L93 Difference]: Finished difference Result 919 states and 1639 transitions. [2021-07-13 23:59:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-13 23:59:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-07-13 23:59:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:52,581 INFO L225 Difference]: With dead ends: 919 [2021-07-13 23:59:52,581 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 23:59:52,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-13 23:59:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 23:59:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-07-13 23:59:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 556 states have (on average 2.0755395683453237) internal successors, (1154), 558 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1154 transitions. [2021-07-13 23:59:52,595 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1154 transitions. Word has length 34 [2021-07-13 23:59:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:52,595 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1154 transitions. [2021-07-13 23:59:52,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1154 transitions. [2021-07-13 23:59:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 23:59:52,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:52,596 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:52,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 23:59:52,597 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash -679109134, now seen corresponding path program 1 times [2021-07-13 23:59:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:52,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834113514] [2021-07-13 23:59:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:52,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-13 23:59:52,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:52,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:52,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834113514] [2021-07-13 23:59:52,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834113514] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:52,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:52,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 23:59:52,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539356119] [2021-07-13 23:59:52,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 23:59:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 23:59:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 23:59:52,625 INFO L87 Difference]: Start difference. First operand 559 states and 1154 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:52,636 INFO L93 Difference]: Finished difference Result 506 states and 1012 transitions. [2021-07-13 23:59:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 23:59:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-07-13 23:59:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:52,639 INFO L225 Difference]: With dead ends: 506 [2021-07-13 23:59:52,639 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 23:59:52,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 23:59:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 23:59:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2021-07-13 23:59:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 336 states have (on average 2.0327380952380953) internal successors, (683), 337 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 683 transitions. [2021-07-13 23:59:52,647 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 683 transitions. Word has length 34 [2021-07-13 23:59:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:52,647 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 683 transitions. [2021-07-13 23:59:52,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 683 transitions. [2021-07-13 23:59:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 23:59:52,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:52,648 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:52,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 23:59:52,649 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 324759162, now seen corresponding path program 1 times [2021-07-13 23:59:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823492169] [2021-07-13 23:59:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:52,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-13 23:59:52,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:52,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:52,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823492169] [2021-07-13 23:59:52,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823492169] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:52,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:52,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 23:59:52,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982901904] [2021-07-13 23:59:52,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 23:59:52,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:52,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 23:59:52,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 23:59:52,719 INFO L87 Difference]: Start difference. First operand 338 states and 683 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:52,798 INFO L93 Difference]: Finished difference Result 505 states and 1068 transitions. [2021-07-13 23:59:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 23:59:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-07-13 23:59:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:52,801 INFO L225 Difference]: With dead ends: 505 [2021-07-13 23:59:52,801 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 23:59:52,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 23:59:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 23:59:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 333. [2021-07-13 23:59:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 331 states have (on average 2.105740181268882) internal successors, (697), 332 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 697 transitions. [2021-07-13 23:59:52,810 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 697 transitions. Word has length 41 [2021-07-13 23:59:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:52,811 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 697 transitions. [2021-07-13 23:59:52,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 697 transitions. [2021-07-13 23:59:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 23:59:52,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 23:59:52,813 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 23:59:52,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 23:59:52,813 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 23:59:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 23:59:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1704975268, now seen corresponding path program 2 times [2021-07-13 23:59:52,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 23:59:52,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454501255] [2021-07-13 23:59:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 23:59:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 23:59:52,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-13 23:59:52,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-13 23:59:52,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 23:59:52,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-13 23:59:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 23:59:52,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 23:59:52,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454501255] [2021-07-13 23:59:52,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454501255] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 23:59:52,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 23:59:52,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 23:59:52,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551189597] [2021-07-13 23:59:52,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 23:59:52,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 23:59:52,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 23:59:52,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 23:59:52,908 INFO L87 Difference]: Start difference. First operand 333 states and 697 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 23:59:52,956 INFO L93 Difference]: Finished difference Result 259 states and 555 transitions. [2021-07-13 23:59:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 23:59:52,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-07-13 23:59:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 23:59:52,957 INFO L225 Difference]: With dead ends: 259 [2021-07-13 23:59:52,958 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 23:59:52,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 23:59:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 23:59:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 23:59:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 23:59:52,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-07-13 23:59:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 23:59:52,967 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 23:59:52,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 23:59:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 23:59:52,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 23:59:52,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 23:59:52,967 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork1 was SAFE (3/3) [2021-07-13 23:59:52,967 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 23:59:52,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 11:59:52 BasicIcfg [2021-07-13 23:59:52,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 23:59:52,973 INFO L168 Benchmark]: Toolchain (without parser) took 2900.25 ms. Allocated memory is still 190.8 MB. Free memory was 153.0 MB in the beginning and 119.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. [2021-07-13 23:59:52,973 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 171.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 23:59:52,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 533.22 ms. Allocated memory is still 190.8 MB. Free memory was 152.8 MB in the beginning and 162.9 MB in the end (delta: -10.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-07-13 23:59:52,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.24 ms. Allocated memory is still 190.8 MB. Free memory was 162.7 MB in the beginning and 160.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 23:59:52,976 INFO L168 Benchmark]: Boogie Preprocessor took 40.66 ms. Allocated memory is still 190.8 MB. Free memory was 160.8 MB in the beginning and 159.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 23:59:52,976 INFO L168 Benchmark]: RCFGBuilder took 474.68 ms. Allocated memory is still 190.8 MB. Free memory was 159.3 MB in the beginning and 136.7 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-07-13 23:59:52,977 INFO L168 Benchmark]: TraceAbstraction took 1792.55 ms. Allocated memory is still 190.8 MB. Free memory was 136.2 MB in the beginning and 119.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-07-13 23:59:52,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 171.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 533.22 ms. Allocated memory is still 190.8 MB. Free memory was 152.8 MB in the beginning and 162.9 MB in the end (delta: -10.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.24 ms. Allocated memory is still 190.8 MB. Free memory was 162.7 MB in the beginning and 160.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.66 ms. Allocated memory is still 190.8 MB. Free memory was 160.8 MB in the beginning and 159.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 474.68 ms. Allocated memory is still 190.8 MB. Free memory was 159.3 MB in the beginning and 136.7 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1792.55 ms. Allocated memory is still 190.8 MB. Free memory was 136.2 MB in the beginning and 119.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2262, positive: 1891, positive conditional: 1891, positive unconditional: 0, negative: 371, negative conditional: 371, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1947, positive: 1891, positive conditional: 0, positive unconditional: 1891, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 480, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 480, positive: 465, positive conditional: 0, positive unconditional: 465, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 33, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1947, positive: 1425, positive conditional: 0, positive unconditional: 1425, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 480, unknown conditional: 0, unknown unconditional: 480] , Statistics on independence cache: Total cache size (in pairs): 480, Positive cache size: 466, Positive conditional cache size: 0, Positive unconditional cache size: 466, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Independence queries for same thread: 315 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 120, positive: 90, positive conditional: 90, positive unconditional: 0, negative: 30, negative conditional: 30, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 90, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 90, unknown conditional: 0, unknown unconditional: 90] , Statistics on independence cache: Total cache size (in pairs): 90, Positive cache size: 90, Positive conditional cache size: 0, Positive unconditional cache size: 90, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 30 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2519, positive: 2161, positive conditional: 2161, positive unconditional: 0, negative: 358, negative conditional: 358, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2205, positive: 2161, positive conditional: 0, positive unconditional: 2161, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 587, positive: 568, positive conditional: 0, positive unconditional: 568, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 587, positive: 566, positive conditional: 0, positive unconditional: 566, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 21, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2205, positive: 1593, positive conditional: 0, positive unconditional: 1593, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 587, unknown conditional: 0, unknown unconditional: 587] , Statistics on independence cache: Total cache size (in pairs): 587, Positive cache size: 568, Positive conditional cache size: 0, Positive unconditional cache size: 568, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Independence queries for same thread: 314 - PositiveResult [Line: 725]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 753]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1184.2ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 17.3ms, AutomataDifference: 304.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 181.6ms, PartialOrderReductionTime: 168.9ms, HoareTripleCheckerStatistics: 261 SDtfs, 127 SDslu, 346 SDs, 0 SdLazy, 102 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 191.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=895occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 24 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.5ms SsaConstructionTime, 77.3ms SatisfiabilityAnalysisTime, 369.9ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 6.5ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr2Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 506.6ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 7.0ms, AutomataDifference: 161.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 79.8ms, PartialOrderReductionTime: 78.2ms, HoareTripleCheckerStatistics: 290 SDtfs, 129 SDslu, 428 SDs, 0 SdLazy, 112 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=919occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 28 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.6ms SsaConstructionTime, 28.7ms SatisfiabilityAnalysisTime, 149.0ms InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...