/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-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 13:26:16,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 13:26:16,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 13:26:16,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 13:26:16,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 13:26:16,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 13:26:16,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 13:26:16,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 13:26:16,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 13:26:16,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 13:26:16,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 13:26:16,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 13:26:16,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 13:26:16,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 13:26:16,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 13:26:16,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 13:26:16,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 13:26:16,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 13:26:16,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 13:26:16,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 13:26:16,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 13:26:16,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 13:26:16,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 13:26:16,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 13:26:16,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 13:26:16,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 13:26:16,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 13:26:16,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 13:26:16,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 13:26:16,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 13:26:16,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 13:26:16,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 13:26:16,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 13:26:16,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 13:26:16,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 13:26:16,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 13:26:16,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 13:26:16,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 13:26:16,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 13:26:16,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 13:26:16,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 13:26:16,831 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 [2021-08-06 13:26:16,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 13:26:16,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 13:26:16,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 13:26:16,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 13:26:16,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 13:26:16,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 13:26:16,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 13:26:16,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 13:26:16,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 13:26:16,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 13:26:16,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 13:26:17,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 13:26:17,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 13:26:17,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 13:26:17,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 13:26:17,110 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 13:26:17,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-08-06 13:26:17,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2763c82d0/f5eadd58477840c0a306599a7de139d9/FLAG29497dd13 [2021-08-06 13:26:17,577 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 13:26:17,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2021-08-06 13:26:17,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2763c82d0/f5eadd58477840c0a306599a7de139d9/FLAG29497dd13 [2021-08-06 13:26:17,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2763c82d0/f5eadd58477840c0a306599a7de139d9 [2021-08-06 13:26:17,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 13:26:17,922 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 13:26:17,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 13:26:17,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 13:26:17,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 13:26:17,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 01:26:17" (1/1) ... [2021-08-06 13:26:17,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48771f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:17, skipping insertion in model container [2021-08-06 13:26:17,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 01:26:17" (1/1) ... [2021-08-06 13:26:17,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 13:26:17,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 13:26:18,155 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-ext/17_szymanski.i[30132,30145] [2021-08-06 13:26:18,158 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-ext/17_szymanski.i[30481,30494] [2021-08-06 13:26:18,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 13:26:18,165 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 13:26:18,193 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-ext/17_szymanski.i[30132,30145] [2021-08-06 13:26:18,195 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-ext/17_szymanski.i[30481,30494] [2021-08-06 13:26:18,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 13:26:18,226 INFO L208 MainTranslator]: Completed translation [2021-08-06 13:26:18,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18 WrapperNode [2021-08-06 13:26:18,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 13:26:18,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 13:26:18,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 13:26:18,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 13:26:18,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 13:26:18,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 13:26:18,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 13:26:18,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 13:26:18,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 13:26:18,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 13:26:18,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 13:26:18,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 13:26:18,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (1/1) ... [2021-08-06 13:26:18,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 13:26:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 13:26:18,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 13:26:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 13:26:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2021-08-06 13:26:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2021-08-06 13:26:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 13:26:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 13:26:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 13:26:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 13:26:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 13:26:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 13:26:18,312 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 13:26:18,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 13:26:18,548 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-08-06 13:26:18,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 01:26:18 BoogieIcfgContainer [2021-08-06 13:26:18,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 13:26:18,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 13:26:18,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 13:26:18,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 13:26:18,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 01:26:17" (1/3) ... [2021-08-06 13:26:18,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55877cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 01:26:18, skipping insertion in model container [2021-08-06 13:26:18,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 01:26:18" (2/3) ... [2021-08-06 13:26:18,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55877cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 01:26:18, skipping insertion in model container [2021-08-06 13:26:18,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 01:26:18" (3/3) ... [2021-08-06 13:26:18,554 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2021-08-06 13:26:18,557 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 13:26:18,557 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 13:26:18,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-06 13:26:18,558 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 13:26:18,575 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,575 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,575 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,575 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,576 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,579 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,579 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,579 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,579 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 13:26:18,582 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-06 13:26:18,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2021-08-06 13:26:18,637 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 13:26:18,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-06 13:26:18,654 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 91 transitions, 187 flow [2021-08-06 13:26:18,694 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 544 states, 542 states have (on average 2.892988929889299) internal successors, (1568), 543 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 544 states, 542 states have (on average 2.892988929889299) internal successors, (1568), 543 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 13:26:18,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:18,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:18,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 13:26:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 801478868, now seen corresponding path program 1 times [2021-08-06 13:26:18,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:18,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942975056] [2021-08-06 13:26:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:18,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:18,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:18,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942975056] [2021-08-06 13:26:18,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942975056] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:18,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:18,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 13:26:18,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831131592] [2021-08-06 13:26:18,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-06 13:26:18,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-06 13:26:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-06 13:26:18,873 INFO L87 Difference]: Start difference. First operand has 544 states, 542 states have (on average 2.892988929889299) internal successors, (1568), 543 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:18,890 INFO L93 Difference]: Finished difference Result 353 states and 874 transitions. [2021-08-06 13:26:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-06 13:26:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 13:26:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:18,899 INFO L225 Difference]: With dead ends: 353 [2021-08-06 13:26:18,899 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 13:26:18,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-06 13:26:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 13:26:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-08-06 13:26:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.4829545454545454) internal successors, (874), 352 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 874 transitions. [2021-08-06 13:26:18,936 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 874 transitions. Word has length 28 [2021-08-06 13:26:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:18,936 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 874 transitions. [2021-08-06 13:26:18,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 874 transitions. [2021-08-06 13:26:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 13:26:18,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:18,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:18,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 13:26:18,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 13:26:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:18,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1750648302, now seen corresponding path program 1 times [2021-08-06 13:26:18,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:18,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314528249] [2021-08-06 13:26:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:18,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314528249] [2021-08-06 13:26:19,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314528249] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758770978] [2021-08-06 13:26:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,004 INFO L87 Difference]: Start difference. First operand 353 states and 874 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,039 INFO L93 Difference]: Finished difference Result 546 states and 1391 transitions. [2021-08-06 13:26:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 13:26:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,044 INFO L225 Difference]: With dead ends: 546 [2021-08-06 13:26:19,044 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 13:26:19,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 13:26:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 327. [2021-08-06 13:26:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.496932515337423) internal successors, (814), 326 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 814 transitions. [2021-08-06 13:26:19,069 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 814 transitions. Word has length 28 [2021-08-06 13:26:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 814 transitions. [2021-08-06 13:26:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 814 transitions. [2021-08-06 13:26:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 13:26:19,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 13:26:19,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 13:26:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1998504097, now seen corresponding path program 1 times [2021-08-06 13:26:19,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128513775] [2021-08-06 13:26:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128513775] [2021-08-06 13:26:19,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128513775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735940844] [2021-08-06 13:26:19,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,162 INFO L87 Difference]: Start difference. First operand 327 states and 814 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,204 INFO L93 Difference]: Finished difference Result 343 states and 821 transitions. [2021-08-06 13:26:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-08-06 13:26:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,207 INFO L225 Difference]: With dead ends: 343 [2021-08-06 13:26:19,207 INFO L226 Difference]: Without dead ends: 343 [2021-08-06 13:26:19,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-08-06 13:26:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2021-08-06 13:26:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.4) internal successors, (816), 340 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 816 transitions. [2021-08-06 13:26:19,213 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 816 transitions. Word has length 42 [2021-08-06 13:26:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,214 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 816 transitions. [2021-08-06 13:26:19,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 816 transitions. [2021-08-06 13:26:19,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 13:26:19,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 13:26:19,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 13:26:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 499597133, now seen corresponding path program 2 times [2021-08-06 13:26:19,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859592754] [2021-08-06 13:26:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859592754] [2021-08-06 13:26:19,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859592754] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405409971] [2021-08-06 13:26:19,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,290 INFO L87 Difference]: Start difference. First operand 341 states and 816 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,350 INFO L93 Difference]: Finished difference Result 341 states and 804 transitions. [2021-08-06 13:26:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-08-06 13:26:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,352 INFO L225 Difference]: With dead ends: 341 [2021-08-06 13:26:19,352 INFO L226 Difference]: Without dead ends: 341 [2021-08-06 13:26:19,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-08-06 13:26:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-08-06 13:26:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.364705882352941) internal successors, (804), 340 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 804 transitions. [2021-08-06 13:26:19,360 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 804 transitions. Word has length 42 [2021-08-06 13:26:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,360 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 804 transitions. [2021-08-06 13:26:19,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 804 transitions. [2021-08-06 13:26:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 13:26:19,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 13:26:19,367 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-06 13:26:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,367 INFO L82 PathProgramCache]: Analyzing trace with hash 150617521, now seen corresponding path program 3 times [2021-08-06 13:26:19,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107973356] [2021-08-06 13:26:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107973356] [2021-08-06 13:26:19,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107973356] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998686211] [2021-08-06 13:26:19,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,431 INFO L87 Difference]: Start difference. First operand 341 states and 804 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,467 INFO L93 Difference]: Finished difference Result 324 states and 743 transitions. [2021-08-06 13:26:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-08-06 13:26:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,467 INFO L225 Difference]: With dead ends: 324 [2021-08-06 13:26:19,468 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 13:26:19,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 13:26:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 13:26:19,468 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) [2021-08-06 13:26:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 13:26:19,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-08-06 13:26:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,468 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 13:26:19,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 13:26:19,469 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 13:26:19,470 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-06 13:26:19,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 13:26:19,473 INFO L308 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was SAFE (1/2) [2021-08-06 13:26:19,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 13:26:19,475 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 13:26:19,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-06 13:26:19,476 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 91 transitions, 187 flow [2021-08-06 13:26:19,482 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 457 states, 455 states have (on average 2.942857142857143) internal successors, (1339), 456 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 455 states have (on average 2.942857142857143) internal successors, (1339), 456 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 13:26:19,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:26:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1897820928, now seen corresponding path program 1 times [2021-08-06 13:26:19,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111062411] [2021-08-06 13:26:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111062411] [2021-08-06 13:26:19,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111062411] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 13:26:19,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670012341] [2021-08-06 13:26:19,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-06 13:26:19,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-06 13:26:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-06 13:26:19,510 INFO L87 Difference]: Start difference. First operand has 457 states, 455 states have (on average 2.942857142857143) internal successors, (1339), 456 states have internal predecessors, (1339), 0 states have call successors, (0), 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 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,512 INFO L93 Difference]: Finished difference Result 353 states and 874 transitions. [2021-08-06 13:26:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-06 13:26:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 13:26:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,514 INFO L225 Difference]: With dead ends: 353 [2021-08-06 13:26:19,514 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 13:26:19,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-06 13:26:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 13:26:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-08-06 13:26:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.4829545454545454) internal successors, (874), 352 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 874 transitions. [2021-08-06 13:26:19,520 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 874 transitions. Word has length 33 [2021-08-06 13:26:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,523 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 874 transitions. [2021-08-06 13:26:19,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 874 transitions. [2021-08-06 13:26:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 13:26:19,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 13:26:19,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:26:19,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash -654306242, now seen corresponding path program 1 times [2021-08-06 13:26:19,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36007260] [2021-08-06 13:26:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36007260] [2021-08-06 13:26:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36007260] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442224004] [2021-08-06 13:26:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,570 INFO L87 Difference]: Start difference. First operand 353 states and 874 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,582 INFO L93 Difference]: Finished difference Result 556 states and 1411 transitions. [2021-08-06 13:26:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 13:26:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,585 INFO L225 Difference]: With dead ends: 556 [2021-08-06 13:26:19,585 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 13:26:19,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 13:26:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 327. [2021-08-06 13:26:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.496932515337423) internal successors, (814), 326 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 814 transitions. [2021-08-06 13:26:19,594 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 814 transitions. Word has length 33 [2021-08-06 13:26:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,594 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 814 transitions. [2021-08-06 13:26:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 814 transitions. [2021-08-06 13:26:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 13:26:19,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 13:26:19,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:26:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash -542399733, now seen corresponding path program 1 times [2021-08-06 13:26:19,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722614510] [2021-08-06 13:26:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722614510] [2021-08-06 13:26:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722614510] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820493695] [2021-08-06 13:26:19,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,630 INFO L87 Difference]: Start difference. First operand 327 states and 814 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,656 INFO L93 Difference]: Finished difference Result 367 states and 881 transitions. [2021-08-06 13:26:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-08-06 13:26:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,658 INFO L225 Difference]: With dead ends: 367 [2021-08-06 13:26:19,658 INFO L226 Difference]: Without dead ends: 367 [2021-08-06 13:26:19,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-06 13:26:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2021-08-06 13:26:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.411602209944751) internal successors, (873), 362 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 873 transitions. [2021-08-06 13:26:19,665 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 873 transitions. Word has length 42 [2021-08-06 13:26:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,667 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 873 transitions. [2021-08-06 13:26:19,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 873 transitions. [2021-08-06 13:26:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 13:26:19,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 13:26:19,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:26:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash 249250711, now seen corresponding path program 2 times [2021-08-06 13:26:19,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145825266] [2021-08-06 13:26:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145825266] [2021-08-06 13:26:19,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145825266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347783299] [2021-08-06 13:26:19,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,711 INFO L87 Difference]: Start difference. First operand 363 states and 873 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,739 INFO L93 Difference]: Finished difference Result 363 states and 861 transitions. [2021-08-06 13:26:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-08-06 13:26:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,741 INFO L225 Difference]: With dead ends: 363 [2021-08-06 13:26:19,741 INFO L226 Difference]: Without dead ends: 363 [2021-08-06 13:26:19,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-06 13:26:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-08-06 13:26:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.3784530386740332) internal successors, (861), 362 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 861 transitions. [2021-08-06 13:26:19,748 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 861 transitions. Word has length 42 [2021-08-06 13:26:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,749 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 861 transitions. [2021-08-06 13:26:19,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 861 transitions. [2021-08-06 13:26:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 13:26:19,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 13:26:19,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 13:26:19,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 13:26:19,750 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-06 13:26:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 13:26:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -99728901, now seen corresponding path program 3 times [2021-08-06 13:26:19,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 13:26:19,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661535407] [2021-08-06 13:26:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 13:26:19,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 13:26:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 13:26:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 13:26:19,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 13:26:19,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661535407] [2021-08-06 13:26:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661535407] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 13:26:19,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 13:26:19,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 13:26:19,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671688955] [2021-08-06 13:26:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 13:26:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 13:26:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 13:26:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,791 INFO L87 Difference]: Start difference. First operand 363 states and 861 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 13:26:19,813 INFO L93 Difference]: Finished difference Result 324 states and 743 transitions. [2021-08-06 13:26:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 13:26:19,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-08-06 13:26:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 13:26:19,814 INFO L225 Difference]: With dead ends: 324 [2021-08-06 13:26:19,814 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 13:26:19,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 13:26:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 13:26:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 13:26:19,814 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) [2021-08-06 13:26:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 13:26:19,814 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-08-06 13:26:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 13:26:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 13:26:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 13:26:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 13:26:19,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 13:26:19,815 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-06 13:26:19,815 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 13:26:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 13:26:19,815 INFO L308 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE,SAFE (2/2) [2021-08-06 13:26:19,816 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 13:26:19,816 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 13:26:19,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 01:26:19 BasicIcfg [2021-08-06 13:26:19,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 13:26:19,819 INFO L168 Benchmark]: Toolchain (without parser) took 1896.58 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 158.6 MB in the beginning and 109.9 MB in the end (delta: 48.7 MB). Peak memory consumption was 89.6 MB. Max. memory is 8.0 GB. [2021-08-06 13:26:19,819 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 196.1 MB. Free memory was 176.5 MB in the beginning and 176.5 MB in the end (delta: 77.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 13:26:19,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.99 ms. Allocated memory is still 196.1 MB. Free memory was 158.4 MB in the beginning and 169.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2021-08-06 13:26:19,821 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.36 ms. Allocated memory is still 196.1 MB. Free memory was 169.4 MB in the beginning and 167.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 13:26:19,821 INFO L168 Benchmark]: Boogie Preprocessor took 14.17 ms. Allocated memory is still 196.1 MB. Free memory was 167.4 MB in the beginning and 166.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 13:26:19,821 INFO L168 Benchmark]: RCFGBuilder took 281.03 ms. Allocated memory is still 196.1 MB. Free memory was 166.1 MB in the beginning and 143.7 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-06 13:26:19,821 INFO L168 Benchmark]: TraceAbstraction took 1267.31 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 143.3 MB in the beginning and 109.9 MB in the end (delta: 33.4 MB). Peak memory consumption was 74.1 MB. Max. memory is 8.0 GB. [2021-08-06 13:26:19,823 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 196.1 MB. Free memory was 176.5 MB in the beginning and 176.5 MB in the end (delta: 77.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 301.99 ms. Allocated memory is still 196.1 MB. Free memory was 158.4 MB in the beginning and 169.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.36 ms. Allocated memory is still 196.1 MB. Free memory was 169.4 MB in the beginning and 167.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.17 ms. Allocated memory is still 196.1 MB. Free memory was 167.4 MB in the beginning and 166.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.03 ms. Allocated memory is still 196.1 MB. Free memory was 166.1 MB in the beginning and 143.7 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1267.31 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 143.3 MB in the beginning and 109.9 MB in the end (delta: 33.4 MB). Peak memory consumption was 74.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 843.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 19.1ms, AutomataDifference: 223.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 56.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 385 SDtfs, 121 SDslu, 164 SDs, 0 SdLazy, 69 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=544occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.2ms AutomataMinimizationTime, 5 MinimizatonAttempts, 156 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.3ms SsaConstructionTime, 81.3ms SatisfiabilityAnalysisTime, 223.7ms InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 227 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 3 procedures, 89 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 340.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 4.8ms, AutomataDifference: 105.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 416 SDtfs, 110 SDslu, 179 SDs, 0 SdLazy, 71 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=457occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 158 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.3ms SsaConstructionTime, 26.3ms SatisfiabilityAnalysisTime, 105.6ms InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 237 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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! [2021-08-06 13:26:19,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...