/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:30:10,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:30:10,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:30:10,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:30:10,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:30:10,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:30:10,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:30:10,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:30:10,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:30:10,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:30:10,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:30:10,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:30:10,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:30:10,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:30:10,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:30:10,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:30:10,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:30:10,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:30:10,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:30:10,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:30:10,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:30:10,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:30:10,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:30:10,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:30:10,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:30:10,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 20:30:10,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 20:30:10,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 20:30:10,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 20:30:10,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 20:30:10,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 20:30:10,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 20:30:10,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 20:30:10,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:30:10,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:30:10,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:30:10,956 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-SemanticLbe.epf [2021-03-11 20:30:10,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:30:10,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:30:10,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:30:10,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:30:10,997 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:30:10,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:30:10,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:30:10,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:30:10,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:30:10,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:30:10,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:30:10,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:30:10,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:30:11,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:30:11,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:30:11,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:30:11,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:30:11,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:30:11,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:30:11,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:30:11,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:30:11,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:30:11,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:30:11,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:30:11,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:30:11,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:30:11,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:30:11,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:30:11,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:30:11,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:30:11,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:30:11,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:30:11,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:30:11,328 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:30:11,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.oepc.i [2021-03-11 20:30:11,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8402d24e6/a038221975fd46409e8719461f0d98c4/FLAG1abdce113 [2021-03-11 20:30:11,835 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:30:11,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.oepc.i [2021-03-11 20:30:11,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8402d24e6/a038221975fd46409e8719461f0d98c4/FLAG1abdce113 [2021-03-11 20:30:12,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8402d24e6/a038221975fd46409e8719461f0d98c4 [2021-03-11 20:30:12,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:30:12,185 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:30:12,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:30:12,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:30:12,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:30:12,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45703cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12, skipping insertion in model container [2021-03-11 20:30:12,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:30:12,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:30:12,385 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/safe033_tso.oepc.i[950,963] [2021-03-11 20:30:12,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:30:12,567 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:30:12,578 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/safe033_tso.oepc.i[950,963] [2021-03-11 20:30:12,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:30:12,689 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:30:12,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12 WrapperNode [2021-03-11 20:30:12,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:30:12,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:30:12,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:30:12,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:30:12,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:30:12,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:30:12,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:30:12,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:30:12,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (1/1) ... [2021-03-11 20:30:12,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:30:12,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:30:12,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:30:12,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:30:12,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (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 [2021-03-11 20:30:12,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:30:12,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:30:12,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:30:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:30:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:30:12,863 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:30:12,864 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:30:12,864 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:30:12,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:30:12,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:30:12,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:30:12,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:30:12,866 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:30:13,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:30:13,159 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:30:13,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:30:13 BoogieIcfgContainer [2021-03-11 20:30:13,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:30:13,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:30:13,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:30:13,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:30:13,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:30:12" (1/3) ... [2021-03-11 20:30:13,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e5983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:30:13, skipping insertion in model container [2021-03-11 20:30:13,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:30:12" (2/3) ... [2021-03-11 20:30:13,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e5983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:30:13, skipping insertion in model container [2021-03-11 20:30:13,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:30:13" (3/3) ... [2021-03-11 20:30:13,167 INFO L111 eAbstractionObserver]: Analyzing ICFG safe033_tso.oepc.i [2021-03-11 20:30:13,171 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:30:13,174 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:30:13,175 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:30:13,194 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,194 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,194 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,194 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,195 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,195 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,195 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,195 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,195 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,196 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,196 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,196 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,196 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,196 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,196 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,197 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,197 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,197 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,197 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,197 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,198 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,198 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,198 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,198 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,200 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,200 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,200 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,204 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,204 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,204 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,204 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:30:13,206 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:30:13,221 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 20:30:13,236 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:30:13,236 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:30:13,237 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:30:13,237 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:30:13,237 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:30:13,237 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:30:13,237 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:30:13,237 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:30:13,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 60 transitions, 130 flow [2021-03-11 20:30:13,274 INFO L129 PetriNetUnfolder]: 2/58 cut-off events. [2021-03-11 20:30:13,274 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:30:13,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 2/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-03-11 20:30:13,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 60 transitions, 130 flow [2021-03-11 20:30:13,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 48 transitions, 102 flow [2021-03-11 20:30:13,283 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:30:13,292 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 48 transitions, 102 flow [2021-03-11 20:30:13,295 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 48 transitions, 102 flow [2021-03-11 20:30:13,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 102 flow [2021-03-11 20:30:13,307 INFO L129 PetriNetUnfolder]: 1/48 cut-off events. [2021-03-11 20:30:13,307 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:30:13,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 48 events. 1/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2021-03-11 20:30:13,309 INFO L116 LiptonReduction]: Number of co-enabled transitions 456 [2021-03-11 20:30:14,922 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-11 20:30:15,142 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-11 20:30:15,210 INFO L131 LiptonReduction]: Checked pairs total: 936 [2021-03-11 20:30:15,210 INFO L133 LiptonReduction]: Total number of compositions: 40 [2021-03-11 20:30:15,211 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1930 [2021-03-11 20:30:15,218 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-11 20:30:15,219 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:30:15,219 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:30:15,219 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 20:30:15,220 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:30:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:30:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash 201138010, now seen corresponding path program 1 times [2021-03-11 20:30:15,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:30:15,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003924943] [2021-03-11 20:30:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:30:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:30:15,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:30:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:30:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003924943] [2021-03-11 20:30:15,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:30:15,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:30:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864467760] [2021-03-11 20:30:15,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:30:15,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:30:15,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:30:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:30:15,371 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 100 [2021-03-11 20:30:15,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 2 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 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) [2021-03-11 20:30:15,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:30:15,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 100 [2021-03-11 20:30:15,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:30:15,386 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 20:30:15,386 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:30:15,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 12 events. 0/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:30:15,388 INFO L132 encePairwiseOnDemand]: 99/100 looper letters, 0 selfloop transitions, 0 changer transitions 0/12 dead transitions. [2021-03-11 20:30:15,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 30 flow [2021-03-11 20:30:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:30:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:30:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 187 transitions. [2021-03-11 20:30:15,400 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.935 [2021-03-11 20:30:15,400 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 187 transitions. [2021-03-11 20:30:15,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 187 transitions. [2021-03-11 20:30:15,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:30:15,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 187 transitions. [2021-03-11 20:30:15,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 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) [2021-03-11 20:30:15,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2021-03-11 20:30:15,420 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2021-03-11 20:30:15,422 INFO L185 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 2 states and 187 transitions. [2021-03-11 20:30:15,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 30 flow [2021-03-11 20:30:15,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 12 transitions, 28 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:30:15,431 INFO L241 Difference]: Finished difference. Result has 18 places, 12 transitions, 28 flow [2021-03-11 20:30:15,433 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=28, PETRI_PLACES=18, PETRI_TRANSITIONS=12} [2021-03-11 20:30:15,433 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2021-03-11 20:30:15,433 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions, 28 flow [2021-03-11 20:30:15,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 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) [2021-03-11 20:30:15,434 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:30:15,434 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 20:30:15,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:30:15,434 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:30:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:30:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1940311127, now seen corresponding path program 1 times [2021-03-11 20:30:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:30:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820083463] [2021-03-11 20:30:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:30:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:30:15,526 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:30:15,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:30:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:30:15,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820083463] [2021-03-11 20:30:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:30:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:30:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037619982] [2021-03-11 20:30:15,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:30:15,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:30:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:30:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:30:15,540 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2021-03-11 20:30:15,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2021-03-11 20:30:15,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:30:15,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2021-03-11 20:30:15,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:30:15,564 INFO L129 PetriNetUnfolder]: 4/31 cut-off events. [2021-03-11 20:30:15,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:30:15,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 31 events. 4/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 89 event pairs, 2 based on Foata normal form. 4/33 useless extension candidates. Maximal degree in co-relation 53. Up to 13 conditions per place. [2021-03-11 20:30:15,565 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 3 selfloop transitions, 4 changer transitions 0/14 dead transitions. [2021-03-11 20:30:15,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 14 transitions, 46 flow [2021-03-11 20:30:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:30:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:30:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2021-03-11 20:30:15,570 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7766666666666666 [2021-03-11 20:30:15,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2021-03-11 20:30:15,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2021-03-11 20:30:15,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:30:15,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2021-03-11 20:30:15,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2021-03-11 20:30:15,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2021-03-11 20:30:15,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2021-03-11 20:30:15,574 INFO L185 Difference]: Start difference. First operand has 18 places, 12 transitions, 28 flow. Second operand 3 states and 233 transitions. [2021-03-11 20:30:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 14 transitions, 46 flow [2021-03-11 20:30:15,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:30:15,576 INFO L241 Difference]: Finished difference. Result has 22 places, 14 transitions, 54 flow [2021-03-11 20:30:15,576 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2021-03-11 20:30:15,576 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2021-03-11 20:30:15,576 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 54 flow [2021-03-11 20:30:15,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2021-03-11 20:30:15,577 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:30:15,577 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:30:15,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:30:15,577 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:30:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:30:15,578 INFO L82 PathProgramCache]: Analyzing trace with hash 20102379, now seen corresponding path program 1 times [2021-03-11 20:30:15,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:30:15,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204758077] [2021-03-11 20:30:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:30:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:30:15,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:30:15,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:30:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:30:15,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204758077] [2021-03-11 20:30:15,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:30:15,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:30:15,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849615065] [2021-03-11 20:30:15,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:30:15,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:30:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:30:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:30:15,676 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 100 [2021-03-11 20:30:15,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 14 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2021-03-11 20:30:15,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:30:15,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 100 [2021-03-11 20:30:15,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:30:15,728 INFO L129 PetriNetUnfolder]: 12/53 cut-off events. [2021-03-11 20:30:15,728 INFO L130 PetriNetUnfolder]: For 13/16 co-relation queries the response was YES. [2021-03-11 20:30:15,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 53 events. 12/53 cut-off events. For 13/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 210 event pairs, 4 based on Foata normal form. 10/60 useless extension candidates. Maximal degree in co-relation 119. Up to 29 conditions per place. [2021-03-11 20:30:15,729 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 4 selfloop transitions, 5 changer transitions 3/21 dead transitions. [2021-03-11 20:30:15,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 92 flow [2021-03-11 20:30:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:30:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:30:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 379 transitions. [2021-03-11 20:30:15,731 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.758 [2021-03-11 20:30:15,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 379 transitions. [2021-03-11 20:30:15,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 379 transitions. [2021-03-11 20:30:15,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:30:15,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 379 transitions. [2021-03-11 20:30:15,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.8) internal successors, (379), 5 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) [2021-03-11 20:30:15,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 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) [2021-03-11 20:30:15,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 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) [2021-03-11 20:30:15,734 INFO L185 Difference]: Start difference. First operand has 22 places, 14 transitions, 54 flow. Second operand 5 states and 379 transitions. [2021-03-11 20:30:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 92 flow [2021-03-11 20:30:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:30:15,736 INFO L241 Difference]: Finished difference. Result has 27 places, 18 transitions, 83 flow [2021-03-11 20:30:15,736 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=83, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2021-03-11 20:30:15,736 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2021-03-11 20:30:15,736 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 83 flow [2021-03-11 20:30:15,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2021-03-11 20:30:15,736 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:30:15,736 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:30:15,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:30:15,737 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:30:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:30:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2022128066, now seen corresponding path program 1 times [2021-03-11 20:30:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:30:15,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210605070] [2021-03-11 20:30:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:30:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:30:15,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:30:15,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:30:15,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:30:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:30:15,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210605070] [2021-03-11 20:30:15,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:30:15,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:30:15,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263402534] [2021-03-11 20:30:15,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:30:15,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:30:15,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:30:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:30:15,809 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 100 [2021-03-11 20:30:15,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 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) [2021-03-11 20:30:15,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:30:15,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 100 [2021-03-11 20:30:15,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:30:15,861 INFO L129 PetriNetUnfolder]: 5/40 cut-off events. [2021-03-11 20:30:15,861 INFO L130 PetriNetUnfolder]: For 60/83 co-relation queries the response was YES. [2021-03-11 20:30:15,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 40 events. 5/40 cut-off events. For 60/83 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 137 event pairs, 0 based on Foata normal form. 25/64 useless extension candidates. Maximal degree in co-relation 126. Up to 20 conditions per place. [2021-03-11 20:30:15,863 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 2 selfloop transitions, 8 changer transitions 2/21 dead transitions. [2021-03-11 20:30:15,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 21 transitions, 121 flow [2021-03-11 20:30:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 20:30:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 20:30:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 525 transitions. [2021-03-11 20:30:15,866 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-03-11 20:30:15,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 525 transitions. [2021-03-11 20:30:15,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 525 transitions. [2021-03-11 20:30:15,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:30:15,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 525 transitions. [2021-03-11 20:30:15,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 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) [2021-03-11 20:30:15,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 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) [2021-03-11 20:30:15,871 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 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) [2021-03-11 20:30:15,871 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 83 flow. Second operand 7 states and 525 transitions. [2021-03-11 20:30:15,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 21 transitions, 121 flow [2021-03-11 20:30:15,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:30:15,874 INFO L241 Difference]: Finished difference. Result has 36 places, 19 transitions, 116 flow [2021-03-11 20:30:15,874 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2021-03-11 20:30:15,875 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 17 predicate places. [2021-03-11 20:30:15,875 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 19 transitions, 116 flow [2021-03-11 20:30:15,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 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) [2021-03-11 20:30:15,875 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:30:15,875 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:30:15,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:30:15,875 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:30:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:30:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 635012011, now seen corresponding path program 1 times [2021-03-11 20:30:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:30:15,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535709472] [2021-03-11 20:30:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:30:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:30:15,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:30:15,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:30:15,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:30:15,944 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:30:15,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:30:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:30:15,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535709472] [2021-03-11 20:30:15,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:30:15,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:30:15,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633972766] [2021-03-11 20:30:15,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:30:15,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:30:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:30:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:30:15,954 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 100 [2021-03-11 20:30:15,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 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) [2021-03-11 20:30:15,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:30:15,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 100 [2021-03-11 20:30:15,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:30:15,992 INFO L129 PetriNetUnfolder]: 5/40 cut-off events. [2021-03-11 20:30:15,992 INFO L130 PetriNetUnfolder]: For 74/81 co-relation queries the response was YES. [2021-03-11 20:30:15,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 40 events. 5/40 cut-off events. For 74/81 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 131 event pairs, 0 based on Foata normal form. 6/45 useless extension candidates. Maximal degree in co-relation 139. Up to 18 conditions per place. [2021-03-11 20:30:15,993 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2021-03-11 20:30:15,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 22 transitions, 140 flow [2021-03-11 20:30:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:30:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:30:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 371 transitions. [2021-03-11 20:30:15,995 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.742 [2021-03-11 20:30:15,995 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 371 transitions. [2021-03-11 20:30:15,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 371 transitions. [2021-03-11 20:30:15,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:30:15,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 371 transitions. [2021-03-11 20:30:15,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 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) [2021-03-11 20:30:15,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 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) [2021-03-11 20:30:15,998 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 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) [2021-03-11 20:30:15,998 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 116 flow. Second operand 5 states and 371 transitions. [2021-03-11 20:30:15,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 22 transitions, 140 flow [2021-03-11 20:30:16,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 115 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-03-11 20:30:16,001 INFO L241 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2021-03-11 20:30:16,001 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2021-03-11 20:30:16,001 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 12 predicate places. [2021-03-11 20:30:16,001 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2021-03-11 20:30:16,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 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) [2021-03-11 20:30:16,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:30:16,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:30:16 BasicIcfg [2021-03-11 20:30:16,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:30:16,006 INFO L168 Benchmark]: Toolchain (without parser) took 3823.35 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 234.8 MB in the beginning and 234.5 MB in the end (delta: 291.3 kB). Peak memory consumption was 87.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:30:16,011 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:30:16,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.50 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 234.2 MB in the beginning and 306.6 MB in the end (delta: -72.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:30:16,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.21 ms. Allocated memory is still 343.9 MB. Free memory was 306.6 MB in the beginning and 304.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:30:16,012 INFO L168 Benchmark]: Boogie Preprocessor took 32.22 ms. Allocated memory is still 343.9 MB. Free memory was 304.5 MB in the beginning and 303.8 MB in the end (delta: 709.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:30:16,012 INFO L168 Benchmark]: RCFGBuilder took 383.53 ms. Allocated memory is still 343.9 MB. Free memory was 303.8 MB in the beginning and 284.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-03-11 20:30:16,012 INFO L168 Benchmark]: TraceAbstraction took 2842.70 ms. Allocated memory is still 343.9 MB. Free memory was 283.6 MB in the beginning and 234.5 MB in the end (delta: 49.0 MB). Peak memory consumption was 51.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:30:16,014 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 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 504.50 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 234.2 MB in the beginning and 306.6 MB in the end (delta: -72.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 52.21 ms. Allocated memory is still 343.9 MB. Free memory was 306.6 MB in the beginning and 304.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 32.22 ms. Allocated memory is still 343.9 MB. Free memory was 304.5 MB in the beginning and 303.8 MB in the end (delta: 709.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 383.53 ms. Allocated memory is still 343.9 MB. Free memory was 303.8 MB in the beginning and 284.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2842.70 ms. Allocated memory is still 343.9 MB. Free memory was 283.6 MB in the beginning and 234.5 MB in the end (delta: 49.0 MB). Peak memory consumption was 51.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1915.5ms, 54 PlacesBefore, 19 PlacesAfterwards, 48 TransitionsBefore, 13 TransitionsAfterwards, 456 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 40 TotalNumberOfCompositions, 936 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 497, positive: 434, positive conditional: 0, positive unconditional: 434, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 321, positive: 297, positive conditional: 0, positive unconditional: 297, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 321, positive: 295, positive conditional: 0, positive unconditional: 295, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 26, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 98, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 89, negative conditional: 0, negative unconditional: 89, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 497, positive: 137, positive conditional: 0, positive unconditional: 137, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 321, unknown conditional: 0, unknown unconditional: 321] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2769.2ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 280.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1978.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18 SDtfs, 7 SDslu, 7 SDs, 0 SdLazy, 41 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=4, InterpolantAutomatonStates: 22, 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: 13.0ms SsaConstructionTime, 118.4ms SatisfiabilityAnalysisTime, 239.9ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...