/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/dekker.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:28:59,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:28:59,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:28:59,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:28:59,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:28:59,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:28:59,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:28:59,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:28:59,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:28:59,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:28:59,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:28:59,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-12 15:28:59,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:28:59,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:28:59,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:28:59,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 15:28:59,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:28:59,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:28:59,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:28:59,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:28:59,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:28:59,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:28:59,777 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:28:59,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:28:59,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:28:59,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:28:59,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:28:59,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:28:59,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:28:59,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:28:59,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:28:59,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:28:59,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:28:59,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:29:00,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:29:00,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:29:00,012 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:29:00,014 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:29:00,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/dekker.i [2021-06-12 15:29:00,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec573354/2fbf8b82697f453fb25e8034414f85cc/FLAGa80c08c58 [2021-06-12 15:29:00,477 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:29:00,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/dekker.i [2021-06-12 15:29:00,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec573354/2fbf8b82697f453fb25e8034414f85cc/FLAGa80c08c58 [2021-06-12 15:29:00,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec573354/2fbf8b82697f453fb25e8034414f85cc [2021-06-12 15:29:00,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:29:00,503 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:29:00,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:29:00,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:29:00,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:29:00,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c901c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00, skipping insertion in model container [2021-06-12 15:29:00,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:29:00,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:29:00,627 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-06-12 15:29:00,762 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/dekker.i[31403,31416] [2021-06-12 15:29:00,771 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/dekker.i[32483,32496] [2021-06-12 15:29:00,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:29:00,782 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:29:00,798 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-06-12 15:29:00,813 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/dekker.i[31403,31416] [2021-06-12 15:29:00,814 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/dekker.i[32483,32496] [2021-06-12 15:29:00,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:29:00,865 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:29:00,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00 WrapperNode [2021-06-12 15:29:00,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:29:00,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:29:00,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:29:00,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:29:00,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:29:00,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:29:00,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:29:00,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:29:00,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (1/1) ... [2021-06-12 15:29:00,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:29:00,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:29:00,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:29:00,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:29:00,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (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 [2021-06-12 15:29:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2021-06-12 15:29:00,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-06-12 15:29:00,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:29:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:29:00,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:29:00,959 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:29:01,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:29:01,329 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-06-12 15:29:01,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:29:01 BoogieIcfgContainer [2021-06-12 15:29:01,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:29:01,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:29:01,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:29:01,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:29:01,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:29:00" (1/3) ... [2021-06-12 15:29:01,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a739c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:29:01, skipping insertion in model container [2021-06-12 15:29:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:29:00" (2/3) ... [2021-06-12 15:29:01,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a739c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:29:01, skipping insertion in model container [2021-06-12 15:29:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:29:01" (3/3) ... [2021-06-12 15:29:01,335 INFO L111 eAbstractionObserver]: Analyzing ICFG dekker.i [2021-06-12 15:29:01,341 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:29:01,341 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:29:01,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-12 15:29:01,342 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:29:01,375 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,375 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,375 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,375 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,376 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,376 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,376 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,376 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,376 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,376 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,378 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,378 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,378 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,378 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,379 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,379 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,379 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,379 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,379 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,379 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,381 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,381 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,382 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,382 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,382 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,382 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,382 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,382 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,387 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,388 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,388 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,388 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,393 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,393 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,395 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,395 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,395 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,395 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f2~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,395 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,395 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,401 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,401 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,401 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,401 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,402 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,402 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:29:01,412 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 15:29:01,427 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-12 15:29:01,445 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:29:01,445 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:29:01,445 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:29:01,445 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:29:01,445 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:29:01,445 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:29:01,445 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:29:01,445 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2======== [2021-06-12 15:29:01,453 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 102 transitions, 226 flow [2021-06-12 15:29:01,523 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:29:01,556 INFO L301 ceAbstractionStarter]: Result for error location thr2 was SAFE (1/5) [2021-06-12 15:29:01,558 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-12 15:29:01,563 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:29:01,563 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:29:01,567 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:29:01,567 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:29:01,567 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:29:01,567 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:29:01,567 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:29:01,567 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1======== [2021-06-12 15:29:01,569 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 102 transitions, 226 flow [2021-06-12 15:29:01,596 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,603 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:29:01,603 INFO L301 ceAbstractionStarter]: Result for error location thr1 was SAFE (2/5) [2021-06-12 15:29:01,604 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-12 15:29:01,604 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:29:01,604 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:29:01,604 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:29:01,604 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:29:01,604 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:29:01,605 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:29:01,605 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:29:01,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr1Thread1of1ForFork0======== [2021-06-12 15:29:01,606 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 102 transitions, 226 flow [2021-06-12 15:29:01,633 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 15:29:01,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:01,637 INFO L472 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] [2021-06-12 15:29:01,638 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1600769794, now seen corresponding path program 1 times [2021-06-12 15:29:01,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:01,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407384665] [2021-06-12 15:29:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:01,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:01,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407384665] [2021-06-12 15:29:01,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407384665] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:01,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:01,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 15:29:01,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030183908] [2021-06-12 15:29:01,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-12 15:29:01,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:01,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-12 15:29:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-12 15:29:01,813 INFO L87 Difference]: Start difference. First operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:01,837 INFO L93 Difference]: Finished difference Result 2049 states and 5749 transitions. [2021-06-12 15:29:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-12 15:29:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-06-12 15:29:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:01,859 INFO L225 Difference]: With dead ends: 2049 [2021-06-12 15:29:01,859 INFO L226 Difference]: Without dead ends: 1511 [2021-06-12 15:29:01,860 INFO L728 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 [2021-06-12 15:29:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-06-12 15:29:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1511. [2021-06-12 15:29:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1509 states have (on average 2.863485752153744) internal successors, (4321), 1510 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4321 transitions. [2021-06-12 15:29:01,952 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4321 transitions. Word has length 30 [2021-06-12 15:29:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:01,952 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 4321 transitions. [2021-06-12 15:29:01,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4321 transitions. [2021-06-12 15:29:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 15:29:01,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:01,953 INFO L472 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] [2021-06-12 15:29:01,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:29:01,954 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1600740003, now seen corresponding path program 1 times [2021-06-12 15:29:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:01,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143565204] [2021-06-12 15:29:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143565204] [2021-06-12 15:29:02,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143565204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:29:02,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177944477] [2021-06-12 15:29:02,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:29:02,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:29:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:29:02,033 INFO L87 Difference]: Start difference. First operand 1511 states and 4321 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,058 INFO L93 Difference]: Finished difference Result 1430 states and 4038 transitions. [2021-06-12 15:29:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:29:02,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-06-12 15:29:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,064 INFO L225 Difference]: With dead ends: 1430 [2021-06-12 15:29:02,065 INFO L226 Difference]: Without dead ends: 940 [2021-06-12 15:29:02,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:29:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-12 15:29:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 940. [2021-06-12 15:29:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 938 states have (on average 2.8358208955223883) internal successors, (2660), 939 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2660 transitions. [2021-06-12 15:29:02,088 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2660 transitions. Word has length 30 [2021-06-12 15:29:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,088 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 2660 transitions. [2021-06-12 15:29:02,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2660 transitions. [2021-06-12 15:29:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 15:29:02,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,090 INFO L472 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] [2021-06-12 15:29:02,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:29:02,090 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1011446200, now seen corresponding path program 1 times [2021-06-12 15:29:02,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:02,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283103443] [2021-06-12 15:29:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283103443] [2021-06-12 15:29:02,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283103443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 15:29:02,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874033262] [2021-06-12 15:29:02,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 15:29:02,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 15:29:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 15:29:02,174 INFO L87 Difference]: Start difference. First operand 940 states and 2660 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,216 INFO L93 Difference]: Finished difference Result 1372 states and 4016 transitions. [2021-06-12 15:29:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 15:29:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 [2021-06-12 15:29:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,222 INFO L225 Difference]: With dead ends: 1372 [2021-06-12 15:29:02,222 INFO L226 Difference]: Without dead ends: 1200 [2021-06-12 15:29:02,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 15:29:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-12 15:29:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 880. [2021-06-12 15:29:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 878 states have (on average 2.8337129840546695) internal successors, (2488), 879 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2488 transitions. [2021-06-12 15:29:02,240 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2488 transitions. Word has length 41 [2021-06-12 15:29:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,240 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 2488 transitions. [2021-06-12 15:29:02,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2488 transitions. [2021-06-12 15:29:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 15:29:02,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,243 INFO L472 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] [2021-06-12 15:29:02,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:29:02,243 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1626528406, now seen corresponding path program 2 times [2021-06-12 15:29:02,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:02,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065795788] [2021-06-12 15:29:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065795788] [2021-06-12 15:29:02,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065795788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 15:29:02,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196829443] [2021-06-12 15:29:02,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 15:29:02,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 15:29:02,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 15:29:02,297 INFO L87 Difference]: Start difference. First operand 880 states and 2488 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,320 INFO L93 Difference]: Finished difference Result 1159 states and 3473 transitions. [2021-06-12 15:29:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 15:29:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 [2021-06-12 15:29:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,321 INFO L225 Difference]: With dead ends: 1159 [2021-06-12 15:29:02,321 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 15:29:02,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 15:29:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 15:29:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 15:29:02,321 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) [2021-06-12 15:29:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 15:29:02,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-06-12 15:29:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,322 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 15:29:02,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 15:29:02,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:29:02,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:29:02,322 INFO L301 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (3/5) [2021-06-12 15:29:02,323 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 15:29:02,323 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:29:02,323 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:29:02,323 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:29:02,324 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:29:02,324 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:29:02,324 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:29:02,324 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:29:02,324 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:29:02,325 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 102 transitions, 226 flow [2021-06-12 15:29:02,365 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:29:02,371 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (4/5) [2021-06-12 15:29:02,371 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-12 15:29:02,372 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:29:02,372 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:29:02,372 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:29:02,372 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:29:02,372 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:29:02,372 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:29:02,372 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:29:02,372 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thr2Thread1of1ForFork1======== [2021-06-12 15:29:02,373 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 102 transitions, 226 flow [2021-06-12 15:29:02,399 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:29:02,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,401 INFO L472 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] [2021-06-12 15:29:02,402 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash -339970580, now seen corresponding path program 1 times [2021-06-12 15:29:02,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:02,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458333149] [2021-06-12 15:29:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458333149] [2021-06-12 15:29:02,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458333149] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 15:29:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301041690] [2021-06-12 15:29:02,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-06-12 15:29:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-06-12 15:29:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-06-12 15:29:02,440 INFO L87 Difference]: Start difference. First operand has 2049 states, 2045 states have (on average 3.075794621026895) internal successors, (6290), 2048 states have internal predecessors, (6290), 0 states have call successors, (0), 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 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,451 INFO L93 Difference]: Finished difference Result 2049 states and 5749 transitions. [2021-06-12 15:29:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-12 15:29:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-06-12 15:29:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,456 INFO L225 Difference]: With dead ends: 2049 [2021-06-12 15:29:02,456 INFO L226 Difference]: Without dead ends: 1541 [2021-06-12 15:29:02,456 INFO L728 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 [2021-06-12 15:29:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-06-12 15:29:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1541. [2021-06-12 15:29:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1539 states have (on average 2.8466536712150745) internal successors, (4381), 1540 states have internal predecessors, (4381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 4381 transitions. [2021-06-12 15:29:02,481 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 4381 transitions. Word has length 36 [2021-06-12 15:29:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,482 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 4381 transitions. [2021-06-12 15:29:02,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 4381 transitions. [2021-06-12 15:29:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:29:02,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,483 INFO L472 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] [2021-06-12 15:29:02,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:29:02,483 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:02,483 INFO L82 PathProgramCache]: Analyzing trace with hash -339940789, now seen corresponding path program 1 times [2021-06-12 15:29:02,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:02,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675766792] [2021-06-12 15:29:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675766792] [2021-06-12 15:29:02,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675766792] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 15:29:02,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431151627] [2021-06-12 15:29:02,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 15:29:02,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 15:29:02,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:29:02,515 INFO L87 Difference]: Start difference. First operand 1541 states and 4381 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,529 INFO L93 Difference]: Finished difference Result 1472 states and 4122 transitions. [2021-06-12 15:29:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 15:29:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-06-12 15:29:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,532 INFO L225 Difference]: With dead ends: 1472 [2021-06-12 15:29:02,532 INFO L226 Difference]: Without dead ends: 934 [2021-06-12 15:29:02,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 15:29:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-12 15:29:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2021-06-12 15:29:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 932 states have (on average 2.8412017167381975) internal successors, (2648), 933 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2648 transitions. [2021-06-12 15:29:02,553 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2648 transitions. Word has length 36 [2021-06-12 15:29:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,554 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2648 transitions. [2021-06-12 15:29:02,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2648 transitions. [2021-06-12 15:29:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 15:29:02,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,556 INFO L472 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] [2021-06-12 15:29:02,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:29:02,556 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash 989246268, now seen corresponding path program 1 times [2021-06-12 15:29:02,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:02,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945018358] [2021-06-12 15:29:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945018358] [2021-06-12 15:29:02,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945018358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 15:29:02,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355939538] [2021-06-12 15:29:02,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 15:29:02,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 15:29:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 15:29:02,595 INFO L87 Difference]: Start difference. First operand 934 states and 2648 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,629 INFO L93 Difference]: Finished difference Result 1330 states and 3897 transitions. [2021-06-12 15:29:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 15:29:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 [2021-06-12 15:29:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,633 INFO L225 Difference]: With dead ends: 1330 [2021-06-12 15:29:02,634 INFO L226 Difference]: Without dead ends: 1244 [2021-06-12 15:29:02,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 15:29:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-12 15:29:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 924. [2021-06-12 15:29:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 922 states have (on average 2.8427331887201737) internal successors, (2621), 923 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2621 transitions. [2021-06-12 15:29:02,653 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2621 transitions. Word has length 41 [2021-06-12 15:29:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,653 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 2621 transitions. [2021-06-12 15:29:02,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2621 transitions. [2021-06-12 15:29:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 15:29:02,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,655 INFO L472 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] [2021-06-12 15:29:02,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 15:29:02,655 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash 138308668, now seen corresponding path program 2 times [2021-06-12 15:29:02,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:02,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005464809] [2021-06-12 15:29:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005464809] [2021-06-12 15:29:02,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005464809] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:02,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:29:02,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 15:29:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376124667] [2021-06-12 15:29:02,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 15:29:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 15:29:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 15:29:02,691 INFO L87 Difference]: Start difference. First operand 924 states and 2621 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,728 INFO L93 Difference]: Finished difference Result 1227 states and 3672 transitions. [2021-06-12 15:29:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 15:29:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 [2021-06-12 15:29:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,730 INFO L225 Difference]: With dead ends: 1227 [2021-06-12 15:29:02,730 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 15:29:02,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 15:29:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 15:29:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 15:29:02,730 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) [2021-06-12 15:29:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 15:29:02,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-06-12 15:29:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,731 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 15:29:02,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2021-06-12 15:29:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 15:29:02,731 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:29:02,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 15:29:02,731 INFO L301 ceAbstractionStarter]: Result for error location thr2Thread1of1ForFork1 was SAFE (5/5) [2021-06-12 15:29:02,731 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:29:02,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:29:02 BasicIcfg [2021-06-12 15:29:02,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:29:02,736 INFO L168 Benchmark]: Toolchain (without parser) took 2231.67 ms. Allocated memory was 201.3 MB in the beginning and 256.9 MB in the end (delta: 55.6 MB). Free memory was 164.2 MB in the beginning and 226.1 MB in the end (delta: -61.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:29:02,737 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:29:02,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.44 ms. Allocated memory is still 201.3 MB. Free memory was 164.0 MB in the beginning and 162.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:02,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.05 ms. Allocated memory is still 201.3 MB. Free memory was 162.6 MB in the beginning and 160.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:02,738 INFO L168 Benchmark]: Boogie Preprocessor took 14.66 ms. Allocated memory is still 201.3 MB. Free memory was 160.9 MB in the beginning and 159.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:02,738 INFO L168 Benchmark]: RCFGBuilder took 424.79 ms. Allocated memory is still 201.3 MB. Free memory was 159.4 MB in the beginning and 133.7 MB in the end (delta: 25.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:02,739 INFO L168 Benchmark]: TraceAbstraction took 1402.96 ms. Allocated memory was 201.3 MB in the beginning and 256.9 MB in the end (delta: 55.6 MB). Free memory was 133.2 MB in the beginning and 226.1 MB in the end (delta: -92.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:29:02,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 361.44 ms. Allocated memory is still 201.3 MB. Free memory was 164.0 MB in the beginning and 162.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.05 ms. Allocated memory is still 201.3 MB. Free memory was 162.6 MB in the beginning and 160.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.66 ms. Allocated memory is still 201.3 MB. Free memory was 160.9 MB in the beginning and 159.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 424.79 ms. Allocated memory is still 201.3 MB. Free memory was 159.4 MB in the beginning and 133.7 MB in the end (delta: 25.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1402.96 ms. Allocated memory was 201.3 MB in the beginning and 256.9 MB in the end (delta: 55.6 MB). Free memory was 133.2 MB in the beginning and 226.1 MB in the end (delta: -92.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 780]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 739]: 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: thr2 with 1 thread instances CFG has 5 procedures, 132 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 112.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 31.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2049occurred 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: thr1 with 1 thread instances CFG has 5 procedures, 132 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 7.1ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2049occurred 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: thr1Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 132 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 717.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 168.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 392 SDtfs, 207 SDslu, 327 SDs, 0 SdLazy, 41 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2049occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 124.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 320 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.8ms SsaConstructionTime, 72.7ms SatisfiabilityAnalysisTime, 174.1ms InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 170 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, 132 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 5.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2049occurred 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, 132 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 359.5ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 5.8ms, AutomataDifference: 117.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 413 SDtfs, 168 SDslu, 370 SDs, 0 SdLazy, 44 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2049occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 320 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.4ms SsaConstructionTime, 23.4ms SatisfiabilityAnalysisTime, 82.6ms InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 184 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...