/usr/bin/java -Xmx16000000000 -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-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe020_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 11:04:53,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 11:04:53,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 11:04:53,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 11:04:53,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 11:04:53,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 11:04:53,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 11:04:53,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 11:04:53,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 11:04:53,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 11:04:53,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 11:04:53,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 11:04:53,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 11:04:53,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 11:04:53,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 11:04:53,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 11:04:53,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 11:04:53,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 11:04:53,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 11:04:53,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 11:04:53,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 11:04:53,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 11:04:53,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 11:04:53,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 11:04:53,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 11:04:53,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 11:04:53,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 11:04:53,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 11:04:53,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 11:04:53,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 11:04:53,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 11:04:53,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 11:04:53,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 11:04:53,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 11:04:53,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 11:04:53,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 11:04:53,984 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-PN-VariableLbe.epf [2021-03-24 11:04:54,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 11:04:54,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 11:04:54,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 11:04:54,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 11:04:54,012 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 11:04:54,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 11:04:54,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 11:04:54,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 11:04:54,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 11:04:54,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 11:04:54,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 11:04:54,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 11:04:54,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 11:04:54,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 11:04:54,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 11:04:54,016 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 11:04:54,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 11:04:54,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 11:04:54,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 11:04:54,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 11:04:54,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 11:04:54,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 11:04:54,295 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 11:04:54,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_tso.oepc.i [2021-03-24 11:04:54,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76c9df9a9/7f3da00f98b544caa6d5c52cdf5613fe/FLAGf456ca9e7 [2021-03-24 11:04:54,786 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 11:04:54,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_tso.oepc.i [2021-03-24 11:04:54,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76c9df9a9/7f3da00f98b544caa6d5c52cdf5613fe/FLAGf456ca9e7 [2021-03-24 11:04:54,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76c9df9a9/7f3da00f98b544caa6d5c52cdf5613fe [2021-03-24 11:04:54,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 11:04:54,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 11:04:54,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 11:04:54,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 11:04:54,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 11:04:54,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 11:04:54" (1/1) ... [2021-03-24 11:04:54,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701860c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:54, skipping insertion in model container [2021-03-24 11:04:54,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 11:04:54" (1/1) ... [2021-03-24 11:04:54,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 11:04:54,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 11:04:55,020 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_tso.oepc.i[950,963] [2021-03-24 11:04:55,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 11:04:55,131 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 11:04:55,139 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_tso.oepc.i[950,963] [2021-03-24 11:04:55,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 11:04:55,195 INFO L208 MainTranslator]: Completed translation [2021-03-24 11:04:55,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55 WrapperNode [2021-03-24 11:04:55,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 11:04:55,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 11:04:55,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 11:04:55,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 11:04:55,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 11:04:55,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 11:04:55,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 11:04:55,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 11:04:55,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... [2021-03-24 11:04:55,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 11:04:55,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 11:04:55,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 11:04:55,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 11:04:55,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 11:04:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 11:04:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 11:04:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 11:04:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 11:04:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-24 11:04:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-24 11:04:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-24 11:04:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-24 11:04:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-24 11:04:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-24 11:04:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-24 11:04:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 11:04:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 11:04:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 11:04:55,334 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 11:04:55,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 11:04:55,573 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-24 11:04:55,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:04:55 BoogieIcfgContainer [2021-03-24 11:04:55,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 11:04:55,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 11:04:55,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 11:04:55,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 11:04:55,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 11:04:54" (1/3) ... [2021-03-24 11:04:55,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd1a42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:04:55, skipping insertion in model container [2021-03-24 11:04:55,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 11:04:55" (2/3) ... [2021-03-24 11:04:55,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd1a42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 11:04:55, skipping insertion in model container [2021-03-24 11:04:55,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 11:04:55" (3/3) ... [2021-03-24 11:04:55,579 INFO L111 eAbstractionObserver]: Analyzing ICFG safe020_tso.oepc.i [2021-03-24 11:04:55,582 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 11:04:55,585 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 11:04:55,585 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 11:04:55,603 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,603 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,604 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,605 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,606 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,607 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,608 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,608 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,608 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,609 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,609 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,610 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,610 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,613 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,613 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,613 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,613 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,614 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,614 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,615 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,615 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 11:04:55,616 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 11:04:55,628 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 11:04:55,641 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 11:04:55,641 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 11:04:55,642 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 11:04:55,642 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 11:04:55,642 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 11:04:55,642 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 11:04:55,642 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 11:04:55,642 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 11:04:55,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 73 transitions, 161 flow [2021-03-24 11:04:55,671 INFO L129 PetriNetUnfolder]: 2/70 cut-off events. [2021-03-24 11:04:55,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:04:55,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 2/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2021-03-24 11:04:55,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 73 transitions, 161 flow [2021-03-24 11:04:55,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 58 transitions, 125 flow [2021-03-24 11:04:55,677 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 11:04:55,682 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 58 transitions, 125 flow [2021-03-24 11:04:55,684 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 58 transitions, 125 flow [2021-03-24 11:04:55,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 58 transitions, 125 flow [2021-03-24 11:04:55,695 INFO L129 PetriNetUnfolder]: 1/58 cut-off events. [2021-03-24 11:04:55,695 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:04:55,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 58 events. 1/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-03-24 11:04:55,697 INFO L142 LiptonReduction]: Number of co-enabled transitions 804 [2021-03-24 11:04:56,794 INFO L154 LiptonReduction]: Checked pairs total: 958 [2021-03-24 11:04:56,794 INFO L156 LiptonReduction]: Total number of compositions: 38 [2021-03-24 11:04:56,796 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1120 [2021-03-24 11:04:56,804 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-24 11:04:56,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:04:56,804 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:56,805 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:56,805 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:56,808 INFO L82 PathProgramCache]: Analyzing trace with hash 456015442, now seen corresponding path program 1 times [2021-03-24 11:04:56,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:56,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127250469] [2021-03-24 11:04:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:56,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:56,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:56,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:56,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:56,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127250469] [2021-03-24 11:04:56,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:56,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 11:04:56,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30272932] [2021-03-24 11:04:56,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 11:04:56,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 11:04:56,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 11:04:56,968 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 111 [2021-03-24 11:04:56,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2021-03-24 11:04:56,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:56,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 111 [2021-03-24 11:04:56,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:56,984 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2021-03-24 11:04:56,984 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 11:04:56,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 39 event pairs, 1 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2021-03-24 11:04:56,985 INFO L132 encePairwiseOnDemand]: 107/111 looper letters, 3 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2021-03-24 11:04:56,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 65 flow [2021-03-24 11:04:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 11:04:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 11:04:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2021-03-24 11:04:56,993 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9129129129129129 [2021-03-24 11:04:56,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2021-03-24 11:04:56,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2021-03-24 11:04:56,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:56,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2021-03-24 11:04:56,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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) [2021-03-24 11:04:57,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2021-03-24 11:04:57,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2021-03-24 11:04:57,002 INFO L185 Difference]: Start difference. First operand has 30 places, 20 transitions, 49 flow. Second operand 3 states and 304 transitions. [2021-03-24 11:04:57,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 65 flow [2021-03-24 11:04:57,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 22 transitions, 62 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-24 11:04:57,005 INFO L241 Difference]: Finished difference. Result has 30 places, 22 transitions, 65 flow [2021-03-24 11:04:57,006 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2021-03-24 11:04:57,007 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2021-03-24 11:04:57,007 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 65 flow [2021-03-24 11:04:57,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2021-03-24 11:04:57,007 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,007 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 11:04:57,008 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1251576248, now seen corresponding path program 1 times [2021-03-24 11:04:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927863450] [2021-03-24 11:04:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927863450] [2021-03-24 11:04:57,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 11:04:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862658255] [2021-03-24 11:04:57,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 11:04:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 11:04:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 11:04:57,051 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 111 [2021-03-24 11:04:57,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-03-24 11:04:57,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 111 [2021-03-24 11:04:57,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,058 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2021-03-24 11:04:57,058 INFO L130 PetriNetUnfolder]: For 5/6 co-relation queries the response was YES. [2021-03-24 11:04:57,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 28 events. 3/28 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs, 1 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 42. Up to 10 conditions per place. [2021-03-24 11:04:57,059 INFO L132 encePairwiseOnDemand]: 108/111 looper letters, 1 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2021-03-24 11:04:57,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 71 flow [2021-03-24 11:04:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 11:04:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 11:04:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2021-03-24 11:04:57,061 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8948948948948949 [2021-03-24 11:04:57,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2021-03-24 11:04:57,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2021-03-24 11:04:57,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2021-03-24 11:04:57,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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) [2021-03-24 11:04:57,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2021-03-24 11:04:57,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2021-03-24 11:04:57,064 INFO L185 Difference]: Start difference. First operand has 30 places, 22 transitions, 65 flow. Second operand 3 states and 298 transitions. [2021-03-24 11:04:57,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 71 flow [2021-03-24 11:04:57,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 68 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 11:04:57,066 INFO L241 Difference]: Finished difference. Result has 32 places, 22 transitions, 70 flow [2021-03-24 11:04:57,066 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2021-03-24 11:04:57,066 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2021-03-24 11:04:57,067 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 70 flow [2021-03-24 11:04:57,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-03-24 11:04:57,067 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,067 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 11:04:57,067 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash 144166107, now seen corresponding path program 1 times [2021-03-24 11:04:57,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584577486] [2021-03-24 11:04:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:57,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584577486] [2021-03-24 11:04:57,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 11:04:57,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364363341] [2021-03-24 11:04:57,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 11:04:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 11:04:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 11:04:57,121 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 111 [2021-03-24 11:04:57,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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) [2021-03-24 11:04:57,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 111 [2021-03-24 11:04:57,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,142 INFO L129 PetriNetUnfolder]: 10/54 cut-off events. [2021-03-24 11:04:57,142 INFO L130 PetriNetUnfolder]: For 45/57 co-relation queries the response was YES. [2021-03-24 11:04:57,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 54 events. 10/54 cut-off events. For 45/57 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 165 event pairs, 3 based on Foata normal form. 6/58 useless extension candidates. Maximal degree in co-relation 101. Up to 17 conditions per place. [2021-03-24 11:04:57,143 INFO L132 encePairwiseOnDemand]: 106/111 looper letters, 4 selfloop transitions, 4 changer transitions 1/25 dead transitions. [2021-03-24 11:04:57,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 97 flow [2021-03-24 11:04:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 11:04:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 11:04:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2021-03-24 11:04:57,145 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8536036036036037 [2021-03-24 11:04:57,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2021-03-24 11:04:57,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2021-03-24 11:04:57,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2021-03-24 11:04:57,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 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) [2021-03-24 11:04:57,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 11:04:57,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 11:04:57,148 INFO L185 Difference]: Start difference. First operand has 32 places, 22 transitions, 70 flow. Second operand 4 states and 379 transitions. [2021-03-24 11:04:57,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 97 flow [2021-03-24 11:04:57,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 25 transitions, 91 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 11:04:57,149 INFO L241 Difference]: Finished difference. Result has 35 places, 22 transitions, 84 flow [2021-03-24 11:04:57,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=22} [2021-03-24 11:04:57,150 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2021-03-24 11:04:57,150 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 22 transitions, 84 flow [2021-03-24 11:04:57,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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) [2021-03-24 11:04:57,150 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,150 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 11:04:57,150 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1833306774, now seen corresponding path program 1 times [2021-03-24 11:04:57,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706301344] [2021-03-24 11:04:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706301344] [2021-03-24 11:04:57,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 11:04:57,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73313827] [2021-03-24 11:04:57,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 11:04:57,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 11:04:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 11:04:57,203 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 111 [2021-03-24 11:04:57,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 22 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2021-03-24 11:04:57,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 111 [2021-03-24 11:04:57,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,253 INFO L129 PetriNetUnfolder]: 44/109 cut-off events. [2021-03-24 11:04:57,254 INFO L130 PetriNetUnfolder]: For 79/81 co-relation queries the response was YES. [2021-03-24 11:04:57,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 109 events. 44/109 cut-off events. For 79/81 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 436 event pairs, 19 based on Foata normal form. 10/107 useless extension candidates. Maximal degree in co-relation 249. Up to 59 conditions per place. [2021-03-24 11:04:57,267 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 7 selfloop transitions, 7 changer transitions 2/32 dead transitions. [2021-03-24 11:04:57,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 136 flow [2021-03-24 11:04:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 11:04:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 11:04:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 443 transitions. [2021-03-24 11:04:57,269 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7981981981981981 [2021-03-24 11:04:57,269 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 443 transitions. [2021-03-24 11:04:57,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 443 transitions. [2021-03-24 11:04:57,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 443 transitions. [2021-03-24 11:04:57,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 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) [2021-03-24 11:04:57,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 11:04:57,273 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 11:04:57,274 INFO L185 Difference]: Start difference. First operand has 35 places, 22 transitions, 84 flow. Second operand 5 states and 443 transitions. [2021-03-24 11:04:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 136 flow [2021-03-24 11:04:57,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 122 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-03-24 11:04:57,277 INFO L241 Difference]: Finished difference. Result has 38 places, 28 transitions, 124 flow [2021-03-24 11:04:57,278 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2021-03-24 11:04:57,278 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2021-03-24 11:04:57,278 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 124 flow [2021-03-24 11:04:57,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2021-03-24 11:04:57,278 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,278 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 11:04:57,279 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1362879842, now seen corresponding path program 1 times [2021-03-24 11:04:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418777676] [2021-03-24 11:04:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,355 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418777676] [2021-03-24 11:04:57,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 11:04:57,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157417718] [2021-03-24 11:04:57,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 11:04:57,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 11:04:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-24 11:04:57,363 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 111 [2021-03-24 11:04:57,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 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) [2021-03-24 11:04:57,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 111 [2021-03-24 11:04:57,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,415 INFO L129 PetriNetUnfolder]: 26/84 cut-off events. [2021-03-24 11:04:57,416 INFO L130 PetriNetUnfolder]: For 89/187 co-relation queries the response was YES. [2021-03-24 11:04:57,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 84 events. 26/84 cut-off events. For 89/187 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 294 event pairs, 4 based on Foata normal form. 31/110 useless extension candidates. Maximal degree in co-relation 274. Up to 53 conditions per place. [2021-03-24 11:04:57,416 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 5 selfloop transitions, 13 changer transitions 4/38 dead transitions. [2021-03-24 11:04:57,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 226 flow [2021-03-24 11:04:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 11:04:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 11:04:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2021-03-24 11:04:57,418 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7966537966537967 [2021-03-24 11:04:57,418 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2021-03-24 11:04:57,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2021-03-24 11:04:57,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2021-03-24 11:04:57,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 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) [2021-03-24 11:04:57,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 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) [2021-03-24 11:04:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 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) [2021-03-24 11:04:57,421 INFO L185 Difference]: Start difference. First operand has 38 places, 28 transitions, 124 flow. Second operand 7 states and 619 transitions. [2021-03-24 11:04:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 226 flow [2021-03-24 11:04:57,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 11:04:57,423 INFO L241 Difference]: Finished difference. Result has 46 places, 34 transitions, 208 flow [2021-03-24 11:04:57,423 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2021-03-24 11:04:57,423 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2021-03-24 11:04:57,423 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 208 flow [2021-03-24 11:04:57,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 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) [2021-03-24 11:04:57,424 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,424 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 11:04:57,424 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash 156308325, now seen corresponding path program 1 times [2021-03-24 11:04:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963553618] [2021-03-24 11:04:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,448 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:57,452 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-24 11:04:57,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 11:04:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963553618] [2021-03-24 11:04:57,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 11:04:57,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498280162] [2021-03-24 11:04:57,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 11:04:57,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 11:04:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 11:04:57,460 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 111 [2021-03-24 11:04:57,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2021-03-24 11:04:57,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 111 [2021-03-24 11:04:57,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,478 INFO L129 PetriNetUnfolder]: 34/126 cut-off events. [2021-03-24 11:04:57,478 INFO L130 PetriNetUnfolder]: For 320/389 co-relation queries the response was YES. [2021-03-24 11:04:57,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 126 events. 34/126 cut-off events. For 320/389 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 574 event pairs, 5 based on Foata normal form. 9/129 useless extension candidates. Maximal degree in co-relation 490. Up to 82 conditions per place. [2021-03-24 11:04:57,479 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 5 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2021-03-24 11:04:57,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 242 flow [2021-03-24 11:04:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 11:04:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 11:04:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2021-03-24 11:04:57,481 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8528528528528528 [2021-03-24 11:04:57,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2021-03-24 11:04:57,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2021-03-24 11:04:57,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2021-03-24 11:04:57,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2021-03-24 11:04:57,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2021-03-24 11:04:57,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2021-03-24 11:04:57,482 INFO L185 Difference]: Start difference. First operand has 46 places, 34 transitions, 208 flow. Second operand 3 states and 284 transitions. [2021-03-24 11:04:57,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 242 flow [2021-03-24 11:04:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 212 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-03-24 11:04:57,486 INFO L241 Difference]: Finished difference. Result has 47 places, 37 transitions, 217 flow [2021-03-24 11:04:57,486 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2021-03-24 11:04:57,486 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2021-03-24 11:04:57,486 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 217 flow [2021-03-24 11:04:57,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2021-03-24 11:04:57,486 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,486 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 11:04:57,487 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -386564173, now seen corresponding path program 1 times [2021-03-24 11:04:57,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261646887] [2021-03-24 11:04:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:57,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,510 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-24 11:04:57,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 11:04:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261646887] [2021-03-24 11:04:57,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 11:04:57,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024241658] [2021-03-24 11:04:57,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 11:04:57,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 11:04:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 11:04:57,517 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 111 [2021-03-24 11:04:57,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2021-03-24 11:04:57,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 111 [2021-03-24 11:04:57,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,550 INFO L129 PetriNetUnfolder]: 36/142 cut-off events. [2021-03-24 11:04:57,550 INFO L130 PetriNetUnfolder]: For 316/369 co-relation queries the response was YES. [2021-03-24 11:04:57,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 142 events. 36/142 cut-off events. For 316/369 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 717 event pairs, 4 based on Foata normal form. 17/154 useless extension candidates. Maximal degree in co-relation 492. Up to 51 conditions per place. [2021-03-24 11:04:57,551 INFO L132 encePairwiseOnDemand]: 104/111 looper letters, 7 selfloop transitions, 11 changer transitions 4/42 dead transitions. [2021-03-24 11:04:57,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 282 flow [2021-03-24 11:04:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 11:04:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 11:04:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 447 transitions. [2021-03-24 11:04:57,552 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8054054054054054 [2021-03-24 11:04:57,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 447 transitions. [2021-03-24 11:04:57,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 447 transitions. [2021-03-24 11:04:57,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 447 transitions. [2021-03-24 11:04:57,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 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) [2021-03-24 11:04:57,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 11:04:57,554 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 11:04:57,554 INFO L185 Difference]: Start difference. First operand has 47 places, 37 transitions, 217 flow. Second operand 5 states and 447 transitions. [2021-03-24 11:04:57,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 282 flow [2021-03-24 11:04:57,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 11:04:57,557 INFO L241 Difference]: Finished difference. Result has 52 places, 38 transitions, 255 flow [2021-03-24 11:04:57,557 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2021-03-24 11:04:57,557 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2021-03-24 11:04:57,557 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 255 flow [2021-03-24 11:04:57,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2021-03-24 11:04:57,557 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 11:04:57,557 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 11:04:57,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 11:04:57,558 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 11:04:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 11:04:57,558 INFO L82 PathProgramCache]: Analyzing trace with hash -494517359, now seen corresponding path program 2 times [2021-03-24 11:04:57,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 11:04:57,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678277596] [2021-03-24 11:04:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 11:04:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 11:04:57,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 11:04:57,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 11:04:57,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 11:04:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 11:04:57,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678277596] [2021-03-24 11:04:57,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 11:04:57,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 11:04:57,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653523503] [2021-03-24 11:04:57,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 11:04:57,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 11:04:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 11:04:57,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 11:04:57,590 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 111 [2021-03-24 11:04:57,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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) [2021-03-24 11:04:57,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 11:04:57,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 111 [2021-03-24 11:04:57,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 11:04:57,631 INFO L129 PetriNetUnfolder]: 17/100 cut-off events. [2021-03-24 11:04:57,631 INFO L130 PetriNetUnfolder]: For 296/488 co-relation queries the response was YES. [2021-03-24 11:04:57,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 100 events. 17/100 cut-off events. For 296/488 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 471 event pairs, 0 based on Foata normal form. 68/164 useless extension candidates. Maximal degree in co-relation 397. Up to 46 conditions per place. [2021-03-24 11:04:57,632 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2021-03-24 11:04:57,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 40 transitions, 305 flow [2021-03-24 11:04:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-24 11:04:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-24 11:04:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 785 transitions. [2021-03-24 11:04:57,634 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7857857857857858 [2021-03-24 11:04:57,634 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 785 transitions. [2021-03-24 11:04:57,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 785 transitions. [2021-03-24 11:04:57,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 11:04:57,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 785 transitions. [2021-03-24 11:04:57,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 87.22222222222223) internal successors, (785), 9 states have internal predecessors, (785), 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) [2021-03-24 11:04:57,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 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) [2021-03-24 11:04:57,637 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 111.0) internal successors, (1110), 10 states have internal predecessors, (1110), 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) [2021-03-24 11:04:57,637 INFO L185 Difference]: Start difference. First operand has 52 places, 38 transitions, 255 flow. Second operand 9 states and 785 transitions. [2021-03-24 11:04:57,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 40 transitions, 305 flow [2021-03-24 11:04:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 40 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 11:04:57,639 INFO L241 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2021-03-24 11:04:57,639 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2021-03-24 11:04:57,639 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2021-03-24 11:04:57,639 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2021-03-24 11:04:57,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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) [2021-03-24 11:04:57,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 11:04:57,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 11:04:57 BasicIcfg [2021-03-24 11:04:57,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 11:04:57,642 INFO L168 Benchmark]: Toolchain (without parser) took 2826.09 ms. Allocated memory was 308.3 MB in the beginning and 371.2 MB in the end (delta: 62.9 MB). Free memory was 270.6 MB in the beginning and 259.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 74.8 MB. Max. memory is 16.0 GB. [2021-03-24 11:04:57,643 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 308.3 MB. Free memory was 289.0 MB in the beginning and 288.9 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 11:04:57,643 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.08 ms. Allocated memory is still 308.3 MB. Free memory was 270.4 MB in the beginning and 270.3 MB in the end (delta: 94.9 kB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. [2021-03-24 11:04:57,643 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 308.3 MB. Free memory was 270.3 MB in the beginning and 268.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 11:04:57,644 INFO L168 Benchmark]: Boogie Preprocessor took 13.74 ms. Allocated memory is still 308.3 MB. Free memory was 268.2 MB in the beginning and 267.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 11:04:57,644 INFO L168 Benchmark]: RCFGBuilder took 320.36 ms. Allocated memory is still 308.3 MB. Free memory was 267.1 MB in the beginning and 243.0 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-24 11:04:57,644 INFO L168 Benchmark]: TraceAbstraction took 2066.80 ms. Allocated memory was 308.3 MB in the beginning and 371.2 MB in the end (delta: 62.9 MB). Free memory was 243.0 MB in the beginning and 259.1 MB in the end (delta: -16.1 MB). Peak memory consumption was 48.9 MB. Max. memory is 16.0 GB. [2021-03-24 11:04:57,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 308.3 MB. Free memory was 289.0 MB in the beginning and 288.9 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 378.08 ms. Allocated memory is still 308.3 MB. Free memory was 270.4 MB in the beginning and 270.3 MB in the end (delta: 94.9 kB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 308.3 MB. Free memory was 270.3 MB in the beginning and 268.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.74 ms. Allocated memory is still 308.3 MB. Free memory was 268.2 MB in the beginning and 267.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 320.36 ms. Allocated memory is still 308.3 MB. Free memory was 267.1 MB in the beginning and 243.0 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2066.80 ms. Allocated memory was 308.3 MB in the beginning and 371.2 MB in the end (delta: 62.9 MB). Free memory was 243.0 MB in the beginning and 259.1 MB in the end (delta: -16.1 MB). Peak memory consumption was 48.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1110.1ms, 67 PlacesBefore, 30 PlacesAfterwards, 58 TransitionsBefore, 20 TransitionsAfterwards, 804 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 38 TotalNumberOfCompositions, 958 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 652, positive: 618, positive conditional: 0, positive unconditional: 618, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 406, positive: 390, positive conditional: 0, positive unconditional: 390, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 406, positive: 390, positive conditional: 0, positive unconditional: 390, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 652, positive: 228, positive conditional: 0, positive unconditional: 228, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 406, unknown conditional: 0, unknown unconditional: 406] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - PositiveResult [Line: 18]: 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 CFG has 4 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2001.0ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 343.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1159.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 24 SDslu, 17 SDs, 0 SdLazy, 108 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 71.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=255occurred in iteration=7, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.7ms SsaConstructionTime, 98.7ms SatisfiabilityAnalysisTime, 253.0ms InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 395 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...