/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 21:52:23,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 21:52:23,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 21:52:23,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 21:52:23,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 21:52:23,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 21:52:23,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 21:52:23,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 21:52:23,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 21:52:23,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 21:52:23,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 21:52:23,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 21:52:23,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 21:52:23,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 21:52:23,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 21:52:23,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 21:52:23,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 21:52:23,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 21:52:23,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 21:52:23,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 21:52:23,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 21:52:23,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 21:52:23,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 21:52:23,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 21:52:23,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 21:52:23,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 21:52:23,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 21:52:23,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 21:52:23,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 21:52:23,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 21:52:23,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 21:52:23,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 21:52:23,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 21:52:23,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 21:52:23,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 21:52:23,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 21:52:23,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 21:52:23,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 21:52:23,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 21:52:23,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 21:52:23,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 21:52:23,638 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 21:52:23,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 21:52:23,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 21:52:23,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 21:52:23,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 21:52:23,670 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 21:52:23,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 21:52:23,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 21:52:23,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 21:52:23,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 21:52:23,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 21:52:23,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 21:52:23,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 21:52:23,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 21:52:23,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 21:52:23,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 21:52:23,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 21:52:23,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 21:52:23,687 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-07-09 21:52:23,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 21:52:23,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 21:52:23,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 21:52:23,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 21:52:23,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 21:52:23,997 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 21:52:23,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2021-07-09 21:52:24,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fe9000e7/e7b3af2d42bc4a8db920381971cb8feb/FLAGf6c24be89 [2021-07-09 21:52:24,672 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 21:52:24,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2021-07-09 21:52:24,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fe9000e7/e7b3af2d42bc4a8db920381971cb8feb/FLAGf6c24be89 [2021-07-09 21:52:24,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fe9000e7/e7b3af2d42bc4a8db920381971cb8feb [2021-07-09 21:52:24,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 21:52:24,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 21:52:24,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 21:52:24,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 21:52:24,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 21:52:24,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 09:52:24" (1/1) ... [2021-07-09 21:52:24,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c899784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:24, skipping insertion in model container [2021-07-09 21:52:24,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 09:52:24" (1/1) ... [2021-07-09 21:52:24,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 21:52:25,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 21:52:25,188 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-09 21:52:25,282 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[30997,31010] [2021-07-09 21:52:25,291 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[31682,31695] [2021-07-09 21:52:25,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 21:52:25,307 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 21:52:25,331 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-07-09 21:52:25,353 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[30997,31010] [2021-07-09 21:52:25,356 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i[31682,31695] [2021-07-09 21:52:25,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 21:52:25,396 INFO L208 MainTranslator]: Completed translation [2021-07-09 21:52:25,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25 WrapperNode [2021-07-09 21:52:25,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 21:52:25,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 21:52:25,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 21:52:25,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 21:52:25,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 21:52:25,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 21:52:25,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 21:52:25,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 21:52:25,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (1/1) ... [2021-07-09 21:52:25,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 21:52:25,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 21:52:25,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 21:52:25,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 21:52:25,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (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 21:52:25,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 21:52:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-07-09 21:52:25,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-07-09 21:52:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-07-09 21:52:25,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-07-09 21:52:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 21:52:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 21:52:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 21:52:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 21:52:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 21:52:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 21:52:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 21:52:25,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 21:52:25,529 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 21:52:25,916 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 21:52:25,916 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-09 21:52:25,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 09:52:25 BoogieIcfgContainer [2021-07-09 21:52:25,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 21:52:25,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 21:52:25,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 21:52:25,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 21:52:25,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 09:52:24" (1/3) ... [2021-07-09 21:52:25,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382f2a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 09:52:25, skipping insertion in model container [2021-07-09 21:52:25,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 09:52:25" (2/3) ... [2021-07-09 21:52:25,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382f2a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 09:52:25, skipping insertion in model container [2021-07-09 21:52:25,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 09:52:25" (3/3) ... [2021-07-09 21:52:25,928 INFO L111 eAbstractionObserver]: Analyzing ICFG peterson.i [2021-07-09 21:52:25,933 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 21:52:25,934 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 21:52:25,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-09 21:52:25,934 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 21:52:25,968 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,968 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,968 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,973 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,977 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,978 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,978 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,978 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,979 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,979 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,981 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,981 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,983 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,983 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,983 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,983 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,983 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,983 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,984 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,986 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,986 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,986 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,986 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,986 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,986 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,990 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,991 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,991 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,991 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,991 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:25,992 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 21:52:26,008 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 21:52:26,035 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 21:52:26,055 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 21:52:26,055 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 21:52:26,055 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 21:52:26,055 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 21:52:26,055 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 21:52:26,055 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 21:52:26,056 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 21:52:26,056 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-07-09 21:52:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 799 states have (on average 1.6470588235294117) internal successors, (1316), 894 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 21:52:26,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:26,275 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:26,275 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash -11332315, now seen corresponding path program 1 times [2021-07-09 21:52:26,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:26,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96166658] [2021-07-09 21:52:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:26,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:26,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:26,429 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 21:52:26,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96166658] [2021-07-09 21:52:26,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96166658] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:26,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:26,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 21:52:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013428443] [2021-07-09 21:52:26,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-09 21:52:26,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:26,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-09 21:52:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 21:52:26,447 INFO L87 Difference]: Start difference. First operand has 895 states, 799 states have (on average 1.6470588235294117) internal successors, (1316), 894 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:26,473 INFO L93 Difference]: Finished difference Result 895 states and 1195 transitions. [2021-07-09 21:52:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-09 21:52:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 21:52:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:26,488 INFO L225 Difference]: With dead ends: 895 [2021-07-09 21:52:26,488 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 21:52:26,489 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 21:52:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 21:52:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-07-09 21:52:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 593 states have (on average 1.5126475548060707) internal successors, (897), 600 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 897 transitions. [2021-07-09 21:52:26,560 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 897 transitions. Word has length 28 [2021-07-09 21:52:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:26,561 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 897 transitions. [2021-07-09 21:52:26,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 897 transitions. [2021-07-09 21:52:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 21:52:26,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:26,562 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:26,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 21:52:26,563 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash -11302524, now seen corresponding path program 1 times [2021-07-09 21:52:26,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:26,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637270121] [2021-07-09 21:52:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:26,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:26,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:26,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:26,643 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 21:52:26,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637270121] [2021-07-09 21:52:26,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637270121] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:26,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:26,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 21:52:26,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507704162] [2021-07-09 21:52:26,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 21:52:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 21:52:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:26,648 INFO L87 Difference]: Start difference. First operand 601 states and 897 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:26,665 INFO L93 Difference]: Finished difference Result 525 states and 757 transitions. [2021-07-09 21:52:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 21:52:26,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 21:52:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:26,669 INFO L225 Difference]: With dead ends: 525 [2021-07-09 21:52:26,669 INFO L226 Difference]: Without dead ends: 421 [2021-07-09 21:52:26,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-09 21:52:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-07-09 21:52:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.523002421307506) internal successors, (629), 420 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 629 transitions. [2021-07-09 21:52:26,685 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 629 transitions. Word has length 28 [2021-07-09 21:52:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:26,685 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 629 transitions. [2021-07-09 21:52:26,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 629 transitions. [2021-07-09 21:52:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 21:52:26,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:26,688 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 21:52:26,689 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1989593698, now seen corresponding path program 1 times [2021-07-09 21:52:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:26,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709912948] [2021-07-09 21:52:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:26,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:26,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:26,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:26,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:26,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:26,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:26,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:26,787 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 21:52:26,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709912948] [2021-07-09 21:52:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709912948] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:26,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:26,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 21:52:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913749192] [2021-07-09 21:52:26,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 21:52:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 21:52:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 21:52:26,789 INFO L87 Difference]: Start difference. First operand 421 states and 629 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:26,936 INFO L93 Difference]: Finished difference Result 545 states and 853 transitions. [2021-07-09 21:52:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 21:52:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 21:52:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:26,939 INFO L225 Difference]: With dead ends: 545 [2021-07-09 21:52:26,939 INFO L226 Difference]: Without dead ends: 371 [2021-07-09 21:52:26,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 21:52:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-09 21:52:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 347. [2021-07-09 21:52:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 339 states have (on average 1.5427728613569323) internal successors, (523), 346 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 523 transitions. [2021-07-09 21:52:26,952 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 523 transitions. Word has length 41 [2021-07-09 21:52:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:26,953 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 523 transitions. [2021-07-09 21:52:26,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 523 transitions. [2021-07-09 21:52:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 21:52:26,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:26,963 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:26,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 21:52:26,966 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash 791757058, now seen corresponding path program 2 times [2021-07-09 21:52:26,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:26,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083384751] [2021-07-09 21:52:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:27,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:27,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,094 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 21:52:27,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:27,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083384751] [2021-07-09 21:52:27,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083384751] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:27,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:27,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 21:52:27,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444950364] [2021-07-09 21:52:27,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 21:52:27,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:27,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 21:52:27,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 21:52:27,097 INFO L87 Difference]: Start difference. First operand 347 states and 523 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:27,171 INFO L93 Difference]: Finished difference Result 288 states and 456 transitions. [2021-07-09 21:52:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 21:52:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 21:52:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:27,174 INFO L225 Difference]: With dead ends: 288 [2021-07-09 21:52:27,174 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 21:52:27,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 21:52:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 21:52:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 21:52:27,175 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 21:52:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 21:52:27,175 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-07-09 21:52:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:27,176 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 21:52:27,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 21:52:27,176 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 21:52:27,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 21:52:27,177 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (1/3) [2021-07-09 21:52:27,178 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 21:52:27,179 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 21:52:27,179 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 21:52:27,179 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 21:52:27,180 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 21:52:27,180 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 21:52:27,180 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 21:52:27,180 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 21:52:27,180 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 21:52:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,196 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 21:52:27,196 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (2/3) [2021-07-09 21:52:27,196 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 21:52:27,208 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 21:52:27,208 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 21:52:27,208 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 21:52:27,208 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 21:52:27,209 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 21:52:27,209 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 21:52:27,209 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 21:52:27,209 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork1======== [2021-07-09 21:52:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 919 states, 844 states have (on average 2.0841232227488153) internal successors, (1759), 918 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 21:52:27,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:27,313 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:27,313 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash -679138925, now seen corresponding path program 1 times [2021-07-09 21:52:27,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:27,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115937912] [2021-07-09 21:52:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:27,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,343 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 21:52:27,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115937912] [2021-07-09 21:52:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115937912] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:27,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:27,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 21:52:27,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605618358] [2021-07-09 21:52:27,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-09 21:52:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-09 21:52:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-09 21:52:27,347 INFO L87 Difference]: Start difference. First operand has 919 states, 844 states have (on average 2.0841232227488153) internal successors, (1759), 918 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:27,355 INFO L93 Difference]: Finished difference Result 919 states and 1639 transitions. [2021-07-09 21:52:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-09 21:52:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 21:52:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:27,358 INFO L225 Difference]: With dead ends: 919 [2021-07-09 21:52:27,358 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 21:52:27,359 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 21:52:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 21:52:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-07-09 21:52:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 556 states have (on average 2.0755395683453237) internal successors, (1154), 558 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1154 transitions. [2021-07-09 21:52:27,374 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1154 transitions. Word has length 34 [2021-07-09 21:52:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:27,374 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1154 transitions. [2021-07-09 21:52:27,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1154 transitions. [2021-07-09 21:52:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 21:52:27,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:27,375 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:27,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 21:52:27,375 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:27,376 INFO L82 PathProgramCache]: Analyzing trace with hash -679109134, now seen corresponding path program 1 times [2021-07-09 21:52:27,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:27,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914105104] [2021-07-09 21:52:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:27,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-09 21:52:27,443 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,443 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 21:52:27,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:27,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914105104] [2021-07-09 21:52:27,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914105104] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:27,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:27,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 21:52:27,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620510226] [2021-07-09 21:52:27,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 21:52:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 21:52:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:27,445 INFO L87 Difference]: Start difference. First operand 559 states and 1154 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:27,471 INFO L93 Difference]: Finished difference Result 506 states and 1012 transitions. [2021-07-09 21:52:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 21:52:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 21:52:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:27,473 INFO L225 Difference]: With dead ends: 506 [2021-07-09 21:52:27,473 INFO L226 Difference]: Without dead ends: 338 [2021-07-09 21:52:27,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 21:52:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-09 21:52:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2021-07-09 21:52:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 336 states have (on average 2.0327380952380953) internal successors, (683), 337 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 683 transitions. [2021-07-09 21:52:27,482 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 683 transitions. Word has length 34 [2021-07-09 21:52:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:27,482 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 683 transitions. [2021-07-09 21:52:27,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 683 transitions. [2021-07-09 21:52:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 21:52:27,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:27,484 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:27,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 21:52:27,484 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:27,487 INFO L82 PathProgramCache]: Analyzing trace with hash 324759162, now seen corresponding path program 1 times [2021-07-09 21:52:27,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:27,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449504198] [2021-07-09 21:52:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:27,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:27,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,595 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 21:52:27,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:27,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449504198] [2021-07-09 21:52:27,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449504198] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:27,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:27,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 21:52:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806879753] [2021-07-09 21:52:27,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 21:52:27,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 21:52:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 21:52:27,597 INFO L87 Difference]: Start difference. First operand 338 states and 683 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:27,707 INFO L93 Difference]: Finished difference Result 505 states and 1068 transitions. [2021-07-09 21:52:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 21:52:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 21:52:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:27,709 INFO L225 Difference]: With dead ends: 505 [2021-07-09 21:52:27,709 INFO L226 Difference]: Without dead ends: 361 [2021-07-09 21:52:27,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 21:52:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-09 21:52:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 333. [2021-07-09 21:52:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 331 states have (on average 2.105740181268882) internal successors, (697), 332 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 697 transitions. [2021-07-09 21:52:27,718 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 697 transitions. Word has length 41 [2021-07-09 21:52:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:27,719 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 697 transitions. [2021-07-09 21:52:27,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 697 transitions. [2021-07-09 21:52:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 21:52:27,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 21:52:27,720 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 21:52:27,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 21:52:27,720 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 21:52:27,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 21:52:27,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1704975268, now seen corresponding path program 2 times [2021-07-09 21:52:27,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 21:52:27,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988969331] [2021-07-09 21:52:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 21:52:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 21:52:27,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-09 21:52:27,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-09 21:52:27,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 21:52:27,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-09 21:52:27,808 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 21:52:27,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 21:52:27,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988969331] [2021-07-09 21:52:27,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988969331] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 21:52:27,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 21:52:27,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 21:52:27,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676275753] [2021-07-09 21:52:27,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 21:52:27,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 21:52:27,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 21:52:27,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 21:52:27,810 INFO L87 Difference]: Start difference. First operand 333 states and 697 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 21:52:27,866 INFO L93 Difference]: Finished difference Result 259 states and 555 transitions. [2021-07-09 21:52:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 21:52:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 21:52:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 21:52:27,867 INFO L225 Difference]: With dead ends: 259 [2021-07-09 21:52:27,867 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 21:52:27,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 21:52:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 21:52:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 21:52:27,868 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 21:52:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 21:52:27,868 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-07-09 21:52:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 21:52:27,868 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 21:52:27,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 21:52:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 21:52:27,869 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 21:52:27,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 21:52:27,869 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork1 was SAFE (3/3) [2021-07-09 21:52:27,869 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 21:52:27,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 09:52:27 BasicIcfg [2021-07-09 21:52:27,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 21:52:27,872 INFO L168 Benchmark]: Toolchain (without parser) took 2905.44 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 135.1 MB in the beginning and 76.7 MB in the end (delta: 58.3 MB). Peak memory consumption was 94.1 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:27,872 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 172.0 MB. Free memory is still 153.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 21:52:27,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.51 ms. Allocated memory is still 172.0 MB. Free memory was 134.8 MB in the beginning and 144.8 MB in the end (delta: -10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:27,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.83 ms. Allocated memory is still 172.0 MB. Free memory was 144.8 MB in the beginning and 143.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:27,874 INFO L168 Benchmark]: Boogie Preprocessor took 21.75 ms. Allocated memory is still 172.0 MB. Free memory was 143.1 MB in the beginning and 141.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:27,874 INFO L168 Benchmark]: RCFGBuilder took 459.36 ms. Allocated memory is still 172.0 MB. Free memory was 141.7 MB in the beginning and 119.4 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:27,874 INFO L168 Benchmark]: TraceAbstraction took 1948.63 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 119.0 MB in the beginning and 76.7 MB in the end (delta: 42.3 MB). Peak memory consumption was 77.8 MB. Max. memory is 8.0 GB. [2021-07-09 21:52:27,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 172.0 MB. Free memory is still 153.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 428.51 ms. Allocated memory is still 172.0 MB. Free memory was 134.8 MB in the beginning and 144.8 MB in the end (delta: -10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.83 ms. Allocated memory is still 172.0 MB. Free memory was 144.8 MB in the beginning and 143.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.75 ms. Allocated memory is still 172.0 MB. Free memory was 143.1 MB in the beginning and 141.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 459.36 ms. Allocated memory is still 172.0 MB. Free memory was 141.7 MB in the beginning and 119.4 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1948.63 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 119.0 MB in the beginning and 76.7 MB in the end (delta: 42.3 MB). Peak memory consumption was 77.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2262, positive: 1891, positive conditional: 1891, positive unconditional: 0, negative: 371, negative conditional: 371, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1947, positive: 1891, positive conditional: 0, positive unconditional: 1891, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 480, positive: 466, positive conditional: 0, positive unconditional: 466, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 480, positive: 465, positive conditional: 0, positive unconditional: 465, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1947, positive: 1425, positive conditional: 0, positive unconditional: 1425, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 480, unknown conditional: 0, unknown unconditional: 480] , Statistics on independence cache: Total cache size (in pairs): 480, Positive cache size: 466, Positive conditional cache size: 0, Positive unconditional cache size: 466, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Independence queries for same thread: 315 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 120, positive: 90, positive conditional: 90, positive unconditional: 0, negative: 30, negative conditional: 30, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 90, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 90, unknown conditional: 0, unknown unconditional: 90] , Statistics on independence cache: Total cache size (in pairs): 90, Positive cache size: 90, Positive conditional cache size: 0, Positive unconditional cache size: 90, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 30 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2519, positive: 2161, positive conditional: 2161, positive unconditional: 0, negative: 358, negative conditional: 358, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2205, positive: 2161, positive conditional: 0, positive unconditional: 2161, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 587, positive: 568, positive conditional: 0, positive unconditional: 568, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 587, positive: 566, positive conditional: 0, positive unconditional: 566, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 21, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 29, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2205, positive: 1593, positive conditional: 0, positive unconditional: 1593, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 587, unknown conditional: 0, unknown unconditional: 587] , Statistics on independence cache: Total cache size (in pairs): 587, Positive cache size: 568, Positive conditional cache size: 0, Positive unconditional cache size: 568, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Independence queries for same thread: 314 - PositiveResult [Line: 725]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 753]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1123.2ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 27.7ms, AutomataDifference: 307.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 204.3ms, PartialOrderReductionTime: 189.6ms, HoareTripleCheckerStatistics: 261 SDtfs, 127 SDslu, 346 SDs, 0 SdLazy, 102 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=895occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 24 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.5ms SsaConstructionTime, 65.9ms SatisfiabilityAnalysisTime, 272.9ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 12.9ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr2Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 107 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 660.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 6.4ms, AutomataDifference: 214.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 100.2ms, PartialOrderReductionTime: 98.4ms, HoareTripleCheckerStatistics: 290 SDtfs, 129 SDslu, 428 SDs, 0 SdLazy, 112 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=919occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 28 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.1ms SsaConstructionTime, 40.1ms SatisfiabilityAnalysisTime, 200.7ms InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...