/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/lamport.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 21:52:14,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 21:52:14,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 21:52:14,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 21:52:14,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 21:52:14,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 21:52:14,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 21:52:14,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 21:52:14,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 21:52:14,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 21:52:14,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 21:52:14,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 21:52:14,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 21:52:14,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 21:52:14,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 21:52:14,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 21:52:14,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 21:52:14,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 21:52:14,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 21:52:14,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 21:52:14,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 21:52:14,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 21:52:14,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 21:52:14,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 21:52:14,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 21:52:14,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 21:52:14,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 21:52:14,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 21:52:14,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 21:52:14,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 21:52:14,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 21:52:14,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 21:52:14,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 21:52:14,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 21:52:14,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 21:52:14,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 21:52:14,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 21:52:14,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 21:52:14,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 21:52:14,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 21:52:14,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 21:52:14,391 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 [2021-07-09 21:52:14,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 21:52:14,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 21:52:14,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 21:52:14,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 21:52:14,423 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 21:52:14,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 21:52:14,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 21:52:14,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 21:52:14,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 21:52:14,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 21:52:14,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 21:52:14,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 21:52:14,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 21:52:14,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 21:52:14,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 21:52:14,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 21:52:14,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 21:52:14,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 21:52:14,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 21:52:14,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 21:52:14,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 21:52:14,438 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 21:52:14,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 21:52:14,438 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-07-09 21:52:14,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 21:52:14,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 21:52:14,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 21:52:14,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 21:52:14,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 21:52:14,716 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 21:52:14,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/lamport.i [2021-07-09 21:52:14,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f821eaf/4d02921582334d18a7dcff3fb3e1e632/FLAG0949031fe [2021-07-09 21:52:15,298 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 21:52:15,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/lamport.i [2021-07-09 21:52:15,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f821eaf/4d02921582334d18a7dcff3fb3e1e632/FLAG0949031fe [2021-07-09 21:52:15,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f821eaf/4d02921582334d18a7dcff3fb3e1e632 [2021-07-09 21:52:15,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 21:52:15,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 21:52:15,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 21:52:15,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 21:52:15,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 21:52:15,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 09:52:15" (1/1) ... [2021-07-09 21:52:15,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cd34a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:15, skipping insertion in model container [2021-07-09 21:52:15,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 09:52:15" (1/1) ... [2021-07-09 21:52:15,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 21:52:15,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 21:52:15,877 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-09 21:52:16,064 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/lamport.i[32156,32169] [2021-07-09 21:52:16,075 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/lamport.i[34083,34096] [2021-07-09 21:52:16,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 21:52:16,092 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 21:52:16,111 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-09 21:52:16,133 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/lamport.i[32156,32169] [2021-07-09 21:52:16,136 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/lamport.i[34083,34096] [2021-07-09 21:52:16,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 21:52:16,184 INFO L208 MainTranslator]: Completed translation [2021-07-09 21:52:16,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16 WrapperNode [2021-07-09 21:52:16,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 21:52:16,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 21:52:16,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 21:52:16,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 21:52:16,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 21:52:16,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 21:52:16,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 21:52:16,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 21:52:16,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... [2021-07-09 21:52:16,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 21:52:16,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 21:52:16,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 21:52:16,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 21:52:16,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 21:52:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 21:52:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-07-09 21:52:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-07-09 21:52:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-07-09 21:52:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-07-09 21:52:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 21:52:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 21:52:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 21:52:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 21:52:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 21:52:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 21:52:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 21:52:16,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 21:52:16,368 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 21:52:16,847 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 21:52:16,848 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-07-09 21:52:16,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 09:52:16 BoogieIcfgContainer [2021-07-09 21:52:16,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 21:52:16,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 21:52:16,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 21:52:16,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 21:52:16,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 09:52:15" (1/3) ... [2021-07-09 21:52:16,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f530019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 09:52:16, skipping insertion in model container [2021-07-09 21:52:16,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:16" (2/3) ... [2021-07-09 21:52:16,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f530019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 09:52:16, skipping insertion in model container [2021-07-09 21:52:16,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 09:52:16" (3/3) ... [2021-07-09 21:52:16,858 INFO L111 eAbstractionObserver]: Analyzing ICFG lamport.i [2021-07-09 21:52:16,863 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 21:52:16,863 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 21:52:16,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-09 21:52:16,864 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 21:52:16,902 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,902 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,902 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,902 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,903 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,903 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,903 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,903 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,906 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,908 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,908 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,908 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,908 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,909 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,909 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,909 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,909 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,909 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,910 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,910 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,911 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,911 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,911 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,911 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,911 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,912 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,912 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,912 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,912 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,913 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,913 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,913 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,914 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,915 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,916 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,917 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,917 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,917 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,918 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,918 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,919 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,919 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,920 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,920 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,920 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,922 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,922 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,922 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,922 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,923 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,923 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,923 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,923 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,923 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,923 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,924 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,924 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,924 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,925 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,925 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,925 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,926 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,926 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,926 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,926 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,926 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,929 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,930 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,931 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,933 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,934 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,934 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,935 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,941 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,941 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,941 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,941 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,942 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,942 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,942 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,942 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,942 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,944 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~y2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,944 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,945 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,945 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~x2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,945 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,945 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~b12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,945 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,951 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,951 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,952 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,952 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,952 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,952 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,952 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:16,974 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 21:52:17,022 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 21:52:17,042 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 21:52:17,043 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 21:52:17,043 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 21:52:17,043 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 21:52:17,043 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 21:52:17,043 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 21:52:17,043 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 21:52:17,043 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork1======== [2021-07-09 21:52:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 3719 states, 3503 states have (on average 1.9426206109049386) internal successors, (6805), 3718 states have internal predecessors, (6805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 21:52:17,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:17,513 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] [2021-07-09 21:52:17,514 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:17,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1915636410, now seen corresponding path program 1 times [2021-07-09 21:52:17,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:17,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936239035] [2021-07-09 21:52:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:17,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:17,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:17,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:17,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:17,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:17,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936239035] [2021-07-09 21:52:17,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936239035] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:17,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:17,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 21:52:17,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141105112] [2021-07-09 21:52:17,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-09 21:52:17,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-09 21:52:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 21:52:17,756 INFO L87 Difference]: Start difference. First operand has 3719 states, 3503 states have (on average 1.9426206109049386) internal successors, (6805), 3718 states have internal predecessors, (6805), 0 states have call successors, (0), 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 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:17,815 INFO L93 Difference]: Finished difference Result 3719 states and 5944 transitions. [2021-07-09 21:52:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-09 21:52:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-07-09 21:52:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:17,847 INFO L225 Difference]: With dead ends: 3719 [2021-07-09 21:52:17,848 INFO L226 Difference]: Without dead ends: 2991 [2021-07-09 21:52:17,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 21:52:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-07-09 21:52:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2991. [2021-07-09 21:52:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2983 states have (on average 1.732484076433121) internal successors, (5168), 2990 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 5168 transitions. [2021-07-09 21:52:18,031 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 5168 transitions. Word has length 25 [2021-07-09 21:52:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:18,031 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 5168 transitions. [2021-07-09 21:52:18,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 5168 transitions. [2021-07-09 21:52:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 21:52:18,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:18,034 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] [2021-07-09 21:52:18,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 21:52:18,034 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash -977585031, now seen corresponding path program 1 times [2021-07-09 21:52:18,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:18,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561565283] [2021-07-09 21:52:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:18,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:18,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:18,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:18,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561565283] [2021-07-09 21:52:18,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561565283] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:18,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:18,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 21:52:18,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861803618] [2021-07-09 21:52:18,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 21:52:18,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 21:52:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:18,098 INFO L87 Difference]: Start difference. First operand 2991 states and 5168 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:18,136 INFO L93 Difference]: Finished difference Result 2799 states and 4824 transitions. [2021-07-09 21:52:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 21:52:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-07-09 21:52:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:18,148 INFO L225 Difference]: With dead ends: 2799 [2021-07-09 21:52:18,148 INFO L226 Difference]: Without dead ends: 2347 [2021-07-09 21:52:18,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-07-09 21:52:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2347. [2021-07-09 21:52:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2339 states have (on average 1.7374946558358273) internal successors, (4064), 2346 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 4064 transitions. [2021-07-09 21:52:18,216 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 4064 transitions. Word has length 33 [2021-07-09 21:52:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:18,217 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 4064 transitions. [2021-07-09 21:52:18,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 4064 transitions. [2021-07-09 21:52:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:18,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:18,232 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:18,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 21:52:18,233 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash -882747067, now seen corresponding path program 1 times [2021-07-09 21:52:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:18,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756854577] [2021-07-09 21:52:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:18,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:18,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:18,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:18,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756854577] [2021-07-09 21:52:18,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756854577] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:18,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:18,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:18,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817852544] [2021-07-09 21:52:18,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:18,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:18,315 INFO L87 Difference]: Start difference. First operand 2347 states and 4064 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:18,392 INFO L93 Difference]: Finished difference Result 7277 states and 12938 transitions. [2021-07-09 21:52:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 21:52:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:18,429 INFO L225 Difference]: With dead ends: 7277 [2021-07-09 21:52:18,429 INFO L226 Difference]: Without dead ends: 7277 [2021-07-09 21:52:18,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7277 states. [2021-07-09 21:52:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7277 to 2767. [2021-07-09 21:52:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2759 states have (on average 1.7499093874592244) internal successors, (4828), 2766 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 4828 transitions. [2021-07-09 21:52:18,592 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 4828 transitions. Word has length 50 [2021-07-09 21:52:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:18,594 INFO L482 AbstractCegarLoop]: Abstraction has 2767 states and 4828 transitions. [2021-07-09 21:52:18,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 4828 transitions. [2021-07-09 21:52:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:18,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:18,600 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:18,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 21:52:18,600 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash 835687091, now seen corresponding path program 2 times [2021-07-09 21:52:18,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:18,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625735019] [2021-07-09 21:52:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:18,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:18,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:18,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:18,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:18,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625735019] [2021-07-09 21:52:18,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625735019] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:18,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:18,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689852607] [2021-07-09 21:52:18,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:18,673 INFO L87 Difference]: Start difference. First operand 2767 states and 4828 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:18,833 INFO L93 Difference]: Finished difference Result 5987 states and 10466 transitions. [2021-07-09 21:52:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:18,848 INFO L225 Difference]: With dead ends: 5987 [2021-07-09 21:52:18,848 INFO L226 Difference]: Without dead ends: 3093 [2021-07-09 21:52:18,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-07-09 21:52:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2841. [2021-07-09 21:52:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2833 states have (on average 1.7585598305683021) internal successors, (4982), 2840 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4982 transitions. [2021-07-09 21:52:18,927 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4982 transitions. Word has length 50 [2021-07-09 21:52:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:18,929 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 4982 transitions. [2021-07-09 21:52:18,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4982 transitions. [2021-07-09 21:52:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:18,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:18,934 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:18,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 21:52:18,934 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:18,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash -644594175, now seen corresponding path program 3 times [2021-07-09 21:52:18,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:18,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671337511] [2021-07-09 21:52:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:18,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:18,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:18,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:18,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:19,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:19,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671337511] [2021-07-09 21:52:19,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671337511] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:19,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:19,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:19,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709283466] [2021-07-09 21:52:19,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:19,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:19,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:19,007 INFO L87 Difference]: Start difference. First operand 2841 states and 4982 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:19,100 INFO L93 Difference]: Finished difference Result 4145 states and 7186 transitions. [2021-07-09 21:52:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:19,107 INFO L225 Difference]: With dead ends: 4145 [2021-07-09 21:52:19,108 INFO L226 Difference]: Without dead ends: 1713 [2021-07-09 21:52:19,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-07-09 21:52:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1617. [2021-07-09 21:52:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1609 states have (on average 1.5848353014294594) internal successors, (2550), 1616 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2550 transitions. [2021-07-09 21:52:19,149 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2550 transitions. Word has length 50 [2021-07-09 21:52:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:19,149 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 2550 transitions. [2021-07-09 21:52:19,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2550 transitions. [2021-07-09 21:52:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:19,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:19,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:19,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 21:52:19,154 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:19,154 INFO L82 PathProgramCache]: Analyzing trace with hash -800444091, now seen corresponding path program 4 times [2021-07-09 21:52:19,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:19,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080836458] [2021-07-09 21:52:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:19,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:19,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:19,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:19,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:19,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080836458] [2021-07-09 21:52:19,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080836458] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:19,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:19,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:19,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583941756] [2021-07-09 21:52:19,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:19,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:19,265 INFO L87 Difference]: Start difference. First operand 1617 states and 2550 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:19,310 INFO L93 Difference]: Finished difference Result 3465 states and 5386 transitions. [2021-07-09 21:52:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 21:52:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:19,326 INFO L225 Difference]: With dead ends: 3465 [2021-07-09 21:52:19,326 INFO L226 Difference]: Without dead ends: 3189 [2021-07-09 21:52:19,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-07-09 21:52:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 1661. [2021-07-09 21:52:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1653 states have (on average 1.557168784029038) internal successors, (2574), 1660 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2574 transitions. [2021-07-09 21:52:19,379 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2574 transitions. Word has length 50 [2021-07-09 21:52:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:19,379 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 2574 transitions. [2021-07-09 21:52:19,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2574 transitions. [2021-07-09 21:52:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 21:52:19,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:19,383 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:19,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 21:52:19,383 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1911320213, now seen corresponding path program 1 times [2021-07-09 21:52:19,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:19,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742281865] [2021-07-09 21:52:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:19,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:19,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-09 21:52:19,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:19,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:19,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742281865] [2021-07-09 21:52:19,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742281865] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:19,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:19,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783621759] [2021-07-09 21:52:19,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:19,447 INFO L87 Difference]: Start difference. First operand 1661 states and 2574 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:19,475 INFO L93 Difference]: Finished difference Result 1421 states and 2166 transitions. [2021-07-09 21:52:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-07-09 21:52:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:19,482 INFO L225 Difference]: With dead ends: 1421 [2021-07-09 21:52:19,482 INFO L226 Difference]: Without dead ends: 1333 [2021-07-09 21:52:19,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-07-09 21:52:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1285. [2021-07-09 21:52:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1277 states have (on average 1.5458104933437744) internal successors, (1974), 1284 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1974 transitions. [2021-07-09 21:52:19,523 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1974 transitions. Word has length 55 [2021-07-09 21:52:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:19,524 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 1974 transitions. [2021-07-09 21:52:19,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1974 transitions. [2021-07-09 21:52:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 21:52:19,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:19,528 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:19,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 21:52:19,528 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2023071202, now seen corresponding path program 1 times [2021-07-09 21:52:19,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:19,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781341031] [2021-07-09 21:52:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:19,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:19,573 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-09 21:52:19,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:19,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:19,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781341031] [2021-07-09 21:52:19,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781341031] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:19,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:19,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:19,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633423819] [2021-07-09 21:52:19,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:19,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:19,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:19,580 INFO L87 Difference]: Start difference. First operand 1285 states and 1974 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:19,600 INFO L93 Difference]: Finished difference Result 786 states and 1223 transitions. [2021-07-09 21:52:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-07-09 21:52:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:19,601 INFO L225 Difference]: With dead ends: 786 [2021-07-09 21:52:19,601 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 21:52:19,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 21:52:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 21:52:19,604 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) [2021-07-09 21:52:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 21:52:19,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-07-09 21:52:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:19,604 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 21:52:19,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 21:52:19,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 21:52:19,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 21:52:19,605 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork1 was SAFE (1/3) [2021-07-09 21:52:19,607 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 21:52:19,609 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 21:52:19,609 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 21:52:19,610 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 21:52:19,610 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 21:52:19,610 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 21:52:19,610 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 21:52:19,610 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 21:52:19,610 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 21:52:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 200 states have (on average 1.415) internal successors, (283), 211 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 21:52:19,629 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/3) [2021-07-09 21:52:19,629 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 21:52:19,630 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 21:52:19,630 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 21:52:19,630 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 21:52:19,630 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 21:52:19,630 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 21:52:19,630 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 21:52:19,630 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 21:52:19,630 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork0======== [2021-07-09 21:52:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 3749 states, 3575 states have (on average 2.456783216783217) internal successors, (8783), 3748 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 21:52:19,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:19,948 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] [2021-07-09 21:52:19,948 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1479514535, now seen corresponding path program 1 times [2021-07-09 21:52:19,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:19,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454824713] [2021-07-09 21:52:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:19,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:19,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:19,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:19,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454824713] [2021-07-09 21:52:19,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454824713] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:19,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:19,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 21:52:19,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499082250] [2021-07-09 21:52:19,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-09 21:52:19,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-09 21:52:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 21:52:19,992 INFO L87 Difference]: Start difference. First operand has 3749 states, 3575 states have (on average 2.456783216783217) internal successors, (8783), 3748 states have internal predecessors, (8783), 0 states have call successors, (0), 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 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:20,034 INFO L93 Difference]: Finished difference Result 3749 states and 7931 transitions. [2021-07-09 21:52:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-09 21:52:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-07-09 21:52:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:20,048 INFO L225 Difference]: With dead ends: 3749 [2021-07-09 21:52:20,048 INFO L226 Difference]: Without dead ends: 2892 [2021-07-09 21:52:20,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 21:52:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-07-09 21:52:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2892. [2021-07-09 21:52:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2888 states have (on average 2.339335180055402) internal successors, (6756), 2891 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 6756 transitions. [2021-07-09 21:52:20,131 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 6756 transitions. Word has length 31 [2021-07-09 21:52:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:20,132 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 6756 transitions. [2021-07-09 21:52:20,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 6756 transitions. [2021-07-09 21:52:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 21:52:20,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:20,133 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] [2021-07-09 21:52:20,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 21:52:20,133 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1653746266, now seen corresponding path program 1 times [2021-07-09 21:52:20,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:20,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458052671] [2021-07-09 21:52:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:20,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,148 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-09 21:52:20,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:20,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:20,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458052671] [2021-07-09 21:52:20,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458052671] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:20,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:20,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 21:52:20,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352311932] [2021-07-09 21:52:20,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 21:52:20,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 21:52:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:20,154 INFO L87 Difference]: Start difference. First operand 2892 states and 6756 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:20,181 INFO L93 Difference]: Finished difference Result 2726 states and 6364 transitions. [2021-07-09 21:52:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 21:52:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-07-09 21:52:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:20,197 INFO L225 Difference]: With dead ends: 2726 [2021-07-09 21:52:20,197 INFO L226 Difference]: Without dead ends: 2126 [2021-07-09 21:52:20,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-07-09 21:52:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2126. [2021-07-09 21:52:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2124 states have (on average 2.3300376647834273) internal successors, (4949), 2125 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 4949 transitions. [2021-07-09 21:52:20,255 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 4949 transitions. Word has length 39 [2021-07-09 21:52:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:20,256 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 4949 transitions. [2021-07-09 21:52:20,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 4949 transitions. [2021-07-09 21:52:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:20,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:20,262 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:20,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 21:52:20,263 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1436045677, now seen corresponding path program 1 times [2021-07-09 21:52:20,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:20,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729327939] [2021-07-09 21:52:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:20,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:20,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:20,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:20,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:20,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729327939] [2021-07-09 21:52:20,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729327939] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:20,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:20,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:20,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417980347] [2021-07-09 21:52:20,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:20,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:20,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:20,295 INFO L87 Difference]: Start difference. First operand 2126 states and 4949 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:20,416 INFO L93 Difference]: Finished difference Result 7204 states and 16999 transitions. [2021-07-09 21:52:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 21:52:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:20,442 INFO L225 Difference]: With dead ends: 7204 [2021-07-09 21:52:20,442 INFO L226 Difference]: Without dead ends: 7204 [2021-07-09 21:52:20,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2021-07-09 21:52:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 2586. [2021-07-09 21:52:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2584 states have (on average 2.3490712074303404) internal successors, (6070), 2585 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 6070 transitions. [2021-07-09 21:52:20,572 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 6070 transitions. Word has length 50 [2021-07-09 21:52:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:20,572 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 6070 transitions. [2021-07-09 21:52:20,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 6070 transitions. [2021-07-09 21:52:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:20,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:20,578 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:20,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 21:52:20,578 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1295372163, now seen corresponding path program 2 times [2021-07-09 21:52:20,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:20,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495233499] [2021-07-09 21:52:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:20,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:20,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:20,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:20,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:20,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495233499] [2021-07-09 21:52:20,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495233499] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:20,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:20,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673910100] [2021-07-09 21:52:20,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:20,615 INFO L87 Difference]: Start difference. First operand 2586 states and 6070 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:20,721 INFO L93 Difference]: Finished difference Result 5675 states and 13240 transitions. [2021-07-09 21:52:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:20,731 INFO L225 Difference]: With dead ends: 5675 [2021-07-09 21:52:20,731 INFO L226 Difference]: Without dead ends: 3116 [2021-07-09 21:52:20,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-07-09 21:52:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2700. [2021-07-09 21:52:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2698 states have (on average 2.3106004447739066) internal successors, (6234), 2699 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 6234 transitions. [2021-07-09 21:52:20,815 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 6234 transitions. Word has length 50 [2021-07-09 21:52:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:20,816 INFO L482 AbstractCegarLoop]: Abstraction has 2700 states and 6234 transitions. [2021-07-09 21:52:20,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 6234 transitions. [2021-07-09 21:52:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:20,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:20,820 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 21:52:20,820 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1449290059, now seen corresponding path program 3 times [2021-07-09 21:52:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61168275] [2021-07-09 21:52:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:20,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:20,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:20,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:20,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:20,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61168275] [2021-07-09 21:52:20,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61168275] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:20,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:20,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021138381] [2021-07-09 21:52:20,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:20,848 INFO L87 Difference]: Start difference. First operand 2700 states and 6234 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:20,936 INFO L93 Difference]: Finished difference Result 4251 states and 9690 transitions. [2021-07-09 21:52:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:20,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:20,941 INFO L225 Difference]: With dead ends: 4251 [2021-07-09 21:52:20,941 INFO L226 Difference]: Without dead ends: 1663 [2021-07-09 21:52:20,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-07-09 21:52:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1588. [2021-07-09 21:52:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1586 states have (on average 2.0258511979823455) internal successors, (3213), 1587 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 3213 transitions. [2021-07-09 21:52:20,975 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 3213 transitions. Word has length 50 [2021-07-09 21:52:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:20,976 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 3213 transitions. [2021-07-09 21:52:20,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 3213 transitions. [2021-07-09 21:52:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 21:52:20,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:20,979 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:20,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 21:52:20,979 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1457054833, now seen corresponding path program 4 times [2021-07-09 21:52:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:20,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010443697] [2021-07-09 21:52:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:21,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:21,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:21,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:21,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:21,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010443697] [2021-07-09 21:52:21,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010443697] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:21,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:21,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:21,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681913821] [2021-07-09 21:52:21,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:21,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:21,034 INFO L87 Difference]: Start difference. First operand 1588 states and 3213 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:21,070 INFO L93 Difference]: Finished difference Result 3545 states and 7074 transitions. [2021-07-09 21:52:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 21:52:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-07-09 21:52:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:21,079 INFO L225 Difference]: With dead ends: 3545 [2021-07-09 21:52:21,080 INFO L226 Difference]: Without dead ends: 3290 [2021-07-09 21:52:21,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-07-09 21:52:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 1620. [2021-07-09 21:52:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1618 states have (on average 1.9944375772558713) internal successors, (3227), 1619 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 3227 transitions. [2021-07-09 21:52:21,151 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 3227 transitions. Word has length 50 [2021-07-09 21:52:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:21,152 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 3227 transitions. [2021-07-09 21:52:21,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 3227 transitions. [2021-07-09 21:52:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 21:52:21,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:21,157 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:21,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 21:52:21,157 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1301536977, now seen corresponding path program 1 times [2021-07-09 21:52:21,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:21,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813919501] [2021-07-09 21:52:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:21,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:21,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:21,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-09 21:52:21,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:21,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:21,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813919501] [2021-07-09 21:52:21,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813919501] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:21,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:21,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:21,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141001242] [2021-07-09 21:52:21,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:21,196 INFO L87 Difference]: Start difference. First operand 1620 states and 3227 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:21,219 INFO L93 Difference]: Finished difference Result 1476 states and 2915 transitions. [2021-07-09 21:52:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-07-09 21:52:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:21,222 INFO L225 Difference]: With dead ends: 1476 [2021-07-09 21:52:21,222 INFO L226 Difference]: Without dead ends: 1272 [2021-07-09 21:52:21,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-09 21:52:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1184. [2021-07-09 21:52:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1182 states have (on average 1.982233502538071) internal successors, (2343), 1183 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2343 transitions. [2021-07-09 21:52:21,243 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2343 transitions. Word has length 55 [2021-07-09 21:52:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:21,243 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 2343 transitions. [2021-07-09 21:52:21,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2343 transitions. [2021-07-09 21:52:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 21:52:21,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:21,246 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:21,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-09 21:52:21,246 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -245096286, now seen corresponding path program 1 times [2021-07-09 21:52:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:21,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589660723] [2021-07-09 21:52:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:21,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:21,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:21,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-09 21:52:21,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:21,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 21:52:21,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:21,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589660723] [2021-07-09 21:52:21,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589660723] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:21,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:21,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 21:52:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028637894] [2021-07-09 21:52:21,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 21:52:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 21:52:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 21:52:21,282 INFO L87 Difference]: Start difference. First operand 1184 states and 2343 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:21,297 INFO L93 Difference]: Finished difference Result 592 states and 1171 transitions. [2021-07-09 21:52:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 21:52:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-07-09 21:52:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:21,298 INFO L225 Difference]: With dead ends: 592 [2021-07-09 21:52:21,298 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 21:52:21,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 21:52:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 21:52:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 21:52:21,299 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) [2021-07-09 21:52:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 21:52:21,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-07-09 21:52:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:21,299 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 21:52:21,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 21:52:21,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 21:52:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 21:52:21,300 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork0 was SAFE (3/3) [2021-07-09 21:52:21,300 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 21:52:21,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 09:52:21 BasicIcfg [2021-07-09 21:52:21,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 21:52:21,303 INFO L168 Benchmark]: Toolchain (without parser) took 5691.57 ms. Allocated memory was 201.3 MB in the beginning and 388.0 MB in the end (delta: 186.6 MB). Free memory was 165.7 MB in the beginning and 298.1 MB in the end (delta: -132.4 MB). Peak memory consumption was 55.8 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:21,303 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 201.3 MB. Free memory was 184.2 MB in the beginning and 184.0 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 21:52:21,304 INFO L168 Benchmark]: CACSL2BoogieTranslator took 564.04 ms. Allocated memory is still 201.3 MB. Free memory was 165.5 MB in the beginning and 174.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:21,304 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.94 ms. Allocated memory is still 201.3 MB. Free memory was 174.9 MB in the beginning and 173.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:21,304 INFO L168 Benchmark]: Boogie Preprocessor took 43.90 ms. Allocated memory is still 201.3 MB. Free memory was 173.0 MB in the beginning and 171.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:21,304 INFO L168 Benchmark]: RCFGBuilder took 563.21 ms. Allocated memory is still 201.3 MB. Free memory was 171.4 MB in the beginning and 144.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:21,305 INFO L168 Benchmark]: TraceAbstraction took 4450.34 ms. Allocated memory was 201.3 MB in the beginning and 388.0 MB in the end (delta: 186.6 MB). Free memory was 143.6 MB in the beginning and 298.1 MB in the end (delta: -154.5 MB). Peak memory consumption was 33.0 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:21,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 201.3 MB. Free memory was 184.2 MB in the beginning and 184.0 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 564.04 ms. Allocated memory is still 201.3 MB. Free memory was 165.5 MB in the beginning and 174.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.94 ms. Allocated memory is still 201.3 MB. Free memory was 174.9 MB in the beginning and 173.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.90 ms. Allocated memory is still 201.3 MB. Free memory was 173.0 MB in the beginning and 171.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 563.21 ms. Allocated memory is still 201.3 MB. Free memory was 171.4 MB in the beginning and 144.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4450.34 ms. Allocated memory was 201.3 MB in the beginning and 388.0 MB in the end (delta: 186.6 MB). Free memory was 143.6 MB in the beginning and 298.1 MB in the end (delta: -154.5 MB). Peak memory consumption was 33.0 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: 14044, positive: 11466, positive conditional: 11466, positive unconditional: 0, negative: 2578, negative conditional: 2578, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 11626, positive: 11466, positive conditional: 0, positive unconditional: 11466, negative: 160, negative conditional: 0, negative unconditional: 160, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2266, positive: 2226, positive conditional: 0, positive unconditional: 2226, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2266, positive: 2225, positive conditional: 0, positive unconditional: 2225, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 41, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 67, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11626, positive: 9240, positive conditional: 0, positive unconditional: 9240, negative: 120, negative conditional: 0, negative unconditional: 120, unknown: 2266, unknown conditional: 0, unknown unconditional: 2266] , Statistics on independence cache: Total cache size (in pairs): 2266, Positive cache size: 2226, Positive conditional cache size: 0, Positive unconditional cache size: 2226, Negative cache size: 40, Negative conditional cache size: 0, Negative unconditional cache size: 40, Independence queries for same thread: 2418 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 311, positive: 215, positive conditional: 215, positive unconditional: 0, negative: 96, negative conditional: 96, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 215, positive: 215, positive conditional: 0, positive unconditional: 215, 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: 215, positive: 215, positive conditional: 0, positive unconditional: 215, 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: 215, positive: 215, positive conditional: 0, positive unconditional: 215, 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: 215, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 215, unknown conditional: 0, unknown unconditional: 215] , Statistics on independence cache: Total cache size (in pairs): 215, Positive cache size: 215, Positive conditional cache size: 0, Positive unconditional cache size: 215, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 96 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 15577, positive: 12866, positive conditional: 12866, positive unconditional: 0, negative: 2711, negative conditional: 2711, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 13026, positive: 12866, positive conditional: 0, positive unconditional: 12866, negative: 160, negative conditional: 0, negative unconditional: 160, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2688, positive: 2643, positive conditional: 0, positive unconditional: 2643, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2688, positive: 2641, positive conditional: 0, positive unconditional: 2641, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 47, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 48, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 13026, positive: 10223, positive conditional: 0, positive unconditional: 10223, negative: 115, negative conditional: 0, negative unconditional: 115, unknown: 2688, unknown conditional: 0, unknown unconditional: 2688] , Statistics on independence cache: Total cache size (in pairs): 2688, Positive cache size: 2643, Positive conditional cache size: 0, Positive unconditional cache size: 2643, Negative cache size: 45, Negative conditional cache size: 0, Negative unconditional cache size: 45, Independence queries for same thread: 2551 - PositiveResult [Line: 764]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 834]: 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: thr1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2565.0ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 56.4ms, AutomataDifference: 683.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 442.8ms, PartialOrderReductionTime: 419.1ms, HoareTripleCheckerStatistics: 1123 SDtfs, 655 SDslu, 1296 SDs, 0 SdLazy, 205 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 162.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3719occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 611.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 6434 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.3ms SsaConstructionTime, 115.9ms SatisfiabilityAnalysisTime, 391.6ms InterpolantComputationTime, 368 NumberOfCodeBlocks, 368 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 360 ConstructedInterpolants, 0 QuantifiedInterpolants, 470 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.2ms, PartialOrderReductionTime: 9.7ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred 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: thr2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 172 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1670.3ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 36.0ms, AutomataDifference: 558.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 308.5ms, PartialOrderReductionTime: 303.1ms, HoareTripleCheckerStatistics: 1176 SDtfs, 641 SDslu, 1352 SDs, 0 SdLazy, 207 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 137.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3749occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 478.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 6867 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.9ms SsaConstructionTime, 33.2ms SatisfiabilityAnalysisTime, 190.1ms InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 372 ConstructedInterpolants, 0 QuantifiedInterpolants, 486 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...