/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/safe017_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:24:57,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:24:57,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:24:57,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:24:57,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:24:57,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:24:57,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:24:57,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:24:57,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:24:57,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:24:57,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:24:57,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:24:57,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:24:57,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:24:57,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:24:57,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:24:57,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:24:57,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:24:57,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:24:57,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:24:57,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:24:57,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:24:57,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:24:57,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:24:57,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:24:57,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:24:57,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:24:57,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:24:57,975 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 20:24:58,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:24:58,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:24:58,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:24:58,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:24:58,017 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:24:58,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:24:58,018 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:24:58,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:24:58,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:24:58,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:24:58,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:24:58,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:24:58,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:24:58,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:24:58,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:24:58,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:24:58,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:24:58,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:24:58,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:24:58,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:24:58,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:24:58,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:24:58,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:24:58,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:24:58,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:24:58,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:24:58,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:24:58,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:24:58,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:24:58,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:24:58,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:24:58,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:24:58,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:24:58,341 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:24:58,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.opt.i [2021-03-11 20:24:58,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266ff0cef/b0f513db9ed34c44bc6d20bd95fc8f6d/FLAGa966ede2a [2021-03-11 20:24:58,877 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:24:58,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.opt.i [2021-03-11 20:24:58,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266ff0cef/b0f513db9ed34c44bc6d20bd95fc8f6d/FLAGa966ede2a [2021-03-11 20:24:58,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266ff0cef/b0f513db9ed34c44bc6d20bd95fc8f6d [2021-03-11 20:24:58,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:24:58,925 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:24:58,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:24:58,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:24:58,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:24:58,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:24:58" (1/1) ... [2021-03-11 20:24:58,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@adb44ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:58, skipping insertion in model container [2021-03-11 20:24:58,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:24:58" (1/1) ... [2021-03-11 20:24:58,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:24:58,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:24:59,132 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/safe017_tso.opt.i[949,962] [2021-03-11 20:24:59,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:24:59,288 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:24:59,297 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/safe017_tso.opt.i[949,962] [2021-03-11 20:24:59,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:24:59,380 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:24:59,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59 WrapperNode [2021-03-11 20:24:59,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:24:59,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:24:59,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:24:59,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:24:59,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:24:59,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:24:59,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:24:59,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:24:59,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (1/1) ... [2021-03-11 20:24:59,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:24:59,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:24:59,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:24:59,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:24:59,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (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 20:24:59,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:24:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:24:59,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:24:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:24:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:24:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:24:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:24:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:24:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:24:59,507 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:24:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:24:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:24:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:24:59,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:24:59,508 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 20:24:59,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:24:59,903 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:24:59,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:24:59 BoogieIcfgContainer [2021-03-11 20:24:59,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:24:59,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:24:59,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:24:59,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:24:59,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:24:58" (1/3) ... [2021-03-11 20:24:59,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558026c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:24:59, skipping insertion in model container [2021-03-11 20:24:59,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:59" (2/3) ... [2021-03-11 20:24:59,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558026c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:24:59, skipping insertion in model container [2021-03-11 20:24:59,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:24:59" (3/3) ... [2021-03-11 20:24:59,911 INFO L111 eAbstractionObserver]: Analyzing ICFG safe017_tso.opt.i [2021-03-11 20:24:59,918 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:24:59,921 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:24:59,922 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:24:59,959 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,960 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,960 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,960 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,960 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,960 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,961 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,961 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,962 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,962 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,962 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,962 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,963 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,963 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,963 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,963 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,963 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,964 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,964 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,964 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,964 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,965 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,965 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,965 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,965 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,966 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,966 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,966 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,968 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,968 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,968 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,968 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,969 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,969 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,969 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,970 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,972 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,972 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,973 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,973 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,976 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,976 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,977 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,977 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,978 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,978 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,978 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,978 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:59,979 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:24:59,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:25:00,009 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:25:00,009 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:25:00,010 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:25:00,010 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:25:00,010 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:25:00,010 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:25:00,010 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:25:00,010 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:25:00,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 72 transitions, 159 flow [2021-03-11 20:25:00,054 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2021-03-11 20:25:00,055 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:25:00,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 2/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2021-03-11 20:25:00,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 72 transitions, 159 flow [2021-03-11 20:25:00,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 123 flow [2021-03-11 20:25:00,063 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:25:00,071 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 57 transitions, 123 flow [2021-03-11 20:25:00,073 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 57 transitions, 123 flow [2021-03-11 20:25:00,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 57 transitions, 123 flow [2021-03-11 20:25:00,099 INFO L129 PetriNetUnfolder]: 1/57 cut-off events. [2021-03-11 20:25:00,100 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:25:00,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 57 events. 1/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-03-11 20:25:00,101 INFO L116 LiptonReduction]: Number of co-enabled transitions 804 [2021-03-11 20:25:01,887 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-03-11 20:25:02,094 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-03-11 20:25:02,161 INFO L131 LiptonReduction]: Checked pairs total: 1442 [2021-03-11 20:25:02,161 INFO L133 LiptonReduction]: Total number of compositions: 45 [2021-03-11 20:25:02,162 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2101 [2021-03-11 20:25:02,172 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 20:25:02,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:25:02,172 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,172 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,173 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1766898730, now seen corresponding path program 1 times [2021-03-11 20:25:02,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175267216] [2021-03-11 20:25:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:25:02,307 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 20:25:02,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175267216] [2021-03-11 20:25:02,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:25:02,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659608690] [2021-03-11 20:25:02,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:25:02,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:25:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:25:02,327 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 117 [2021-03-11 20:25:02,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 43 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 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 20:25:02,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 117 [2021-03-11 20:25:02,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:02,335 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 20:25:02,335 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:25:02,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:25:02,336 INFO L132 encePairwiseOnDemand]: 116/117 looper letters, 0 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2021-03-11 20:25:02,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 41 flow [2021-03-11 20:25:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:25:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:25:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 221 transitions. [2021-03-11 20:25:02,346 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9444444444444444 [2021-03-11 20:25:02,346 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 221 transitions. [2021-03-11 20:25:02,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 221 transitions. [2021-03-11 20:25:02,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:02,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 221 transitions. [2021-03-11 20:25:02,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 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 20:25:02,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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 20:25:02,364 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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 20:25:02,365 INFO L185 Difference]: Start difference. First operand has 26 places, 17 transitions, 43 flow. Second operand 2 states and 221 transitions. [2021-03-11 20:25:02,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 41 flow [2021-03-11 20:25:02,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 16 transitions, 38 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 20:25:02,370 INFO L241 Difference]: Finished difference. Result has 24 places, 16 transitions, 38 flow [2021-03-11 20:25:02,371 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2021-03-11 20:25:02,372 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2021-03-11 20:25:02,372 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 38 flow [2021-03-11 20:25:02,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 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 20:25:02,372 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,372 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:25:02,373 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1060714191, now seen corresponding path program 1 times [2021-03-11 20:25:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140195211] [2021-03-11 20:25:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,509 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:25:02,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:25:02,525 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 20:25:02,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140195211] [2021-03-11 20:25:02,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:25:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173548620] [2021-03-11 20:25:02,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:25:02,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:25:02,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:25:02,528 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2021-03-11 20:25:02,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 20:25:02,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2021-03-11 20:25:02,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:02,559 INFO L129 PetriNetUnfolder]: 45/132 cut-off events. [2021-03-11 20:25:02,559 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:25:02,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 132 events. 45/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 612 event pairs, 17 based on Foata normal form. 9/134 useless extension candidates. Maximal degree in co-relation 232. Up to 62 conditions per place. [2021-03-11 20:25:02,560 INFO L132 encePairwiseOnDemand]: 110/117 looper letters, 6 selfloop transitions, 6 changer transitions 0/21 dead transitions. [2021-03-11 20:25:02,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 72 flow [2021-03-11 20:25:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:25:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:25:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2021-03-11 20:25:02,563 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7891737891737892 [2021-03-11 20:25:02,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2021-03-11 20:25:02,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2021-03-11 20:25:02,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:02,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2021-03-11 20:25:02,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 20:25:02,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:02,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:02,566 INFO L185 Difference]: Start difference. First operand has 24 places, 16 transitions, 38 flow. Second operand 3 states and 277 transitions. [2021-03-11 20:25:02,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 72 flow [2021-03-11 20:25:02,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 21 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:25:02,567 INFO L241 Difference]: Finished difference. Result has 28 places, 21 transitions, 84 flow [2021-03-11 20:25:02,568 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2021-03-11 20:25:02,568 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2021-03-11 20:25:02,568 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 84 flow [2021-03-11 20:25:02,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 20:25:02,568 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,569 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:25:02,569 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1477597947, now seen corresponding path program 1 times [2021-03-11 20:25:02,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103834981] [2021-03-11 20:25:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:02,605 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 20:25:02,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103834981] [2021-03-11 20:25:02,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:25:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566347029] [2021-03-11 20:25:02,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:25:02,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:25:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:25:02,611 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 117 [2021-03-11 20:25:02,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 84 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) [2021-03-11 20:25:02,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 117 [2021-03-11 20:25:02,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:02,629 INFO L129 PetriNetUnfolder]: 36/110 cut-off events. [2021-03-11 20:25:02,629 INFO L130 PetriNetUnfolder]: For 40/47 co-relation queries the response was YES. [2021-03-11 20:25:02,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 110 events. 36/110 cut-off events. For 40/47 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 464 event pairs, 14 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 254. Up to 49 conditions per place. [2021-03-11 20:25:02,631 INFO L132 encePairwiseOnDemand]: 114/117 looper letters, 1 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2021-03-11 20:25:02,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 92 flow [2021-03-11 20:25:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:25:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:25:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2021-03-11 20:25:02,638 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8575498575498576 [2021-03-11 20:25:02,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2021-03-11 20:25:02,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2021-03-11 20:25:02,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:02,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2021-03-11 20:25:02,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 20:25:02,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:02,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:02,643 INFO L185 Difference]: Start difference. First operand has 28 places, 21 transitions, 84 flow. Second operand 3 states and 301 transitions. [2021-03-11 20:25:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 92 flow [2021-03-11 20:25:02,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:25:02,646 INFO L241 Difference]: Finished difference. Result has 29 places, 21 transitions, 83 flow [2021-03-11 20:25:02,646 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2021-03-11 20:25:02,647 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2021-03-11 20:25:02,647 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 83 flow [2021-03-11 20:25:02,647 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) [2021-03-11 20:25:02,647 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,650 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:25:02,651 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1477577394, now seen corresponding path program 1 times [2021-03-11 20:25:02,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761685202] [2021-03-11 20:25:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:02,705 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:25:02,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:25:02,711 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 20:25:02,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761685202] [2021-03-11 20:25:02,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:25:02,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174004074] [2021-03-11 20:25:02,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:25:02,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:25:02,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:25:02,716 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2021-03-11 20:25:02,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 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 20:25:02,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2021-03-11 20:25:02,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:02,750 INFO L129 PetriNetUnfolder]: 30/101 cut-off events. [2021-03-11 20:25:02,750 INFO L130 PetriNetUnfolder]: For 39/104 co-relation queries the response was YES. [2021-03-11 20:25:02,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 101 events. 30/101 cut-off events. For 39/104 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 402 event pairs, 8 based on Foata normal form. 9/109 useless extension candidates. Maximal degree in co-relation 268. Up to 41 conditions per place. [2021-03-11 20:25:02,754 INFO L132 encePairwiseOnDemand]: 110/117 looper letters, 10 selfloop transitions, 9 changer transitions 0/28 dead transitions. [2021-03-11 20:25:02,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 155 flow [2021-03-11 20:25:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:25:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:25:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 369 transitions. [2021-03-11 20:25:02,756 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7884615384615384 [2021-03-11 20:25:02,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 369 transitions. [2021-03-11 20:25:02,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 369 transitions. [2021-03-11 20:25:02,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:02,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 369 transitions. [2021-03-11 20:25:02,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.25) internal successors, (369), 4 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 20:25:02,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:02,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:02,759 INFO L185 Difference]: Start difference. First operand has 29 places, 21 transitions, 83 flow. Second operand 4 states and 369 transitions. [2021-03-11 20:25:02,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 155 flow [2021-03-11 20:25:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:25:02,762 INFO L241 Difference]: Finished difference. Result has 32 places, 26 transitions, 134 flow [2021-03-11 20:25:02,762 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2021-03-11 20:25:02,762 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2021-03-11 20:25:02,762 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 134 flow [2021-03-11 20:25:02,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 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 20:25:02,762 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,763 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:25:02,763 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1439104492, now seen corresponding path program 1 times [2021-03-11 20:25:02,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394422583] [2021-03-11 20:25:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:02,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:02,802 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 20:25:02,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394422583] [2021-03-11 20:25:02,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:25:02,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7036040] [2021-03-11 20:25:02,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:25:02,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:25:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:25:02,805 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 117 [2021-03-11 20:25:02,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 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 20:25:02,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 117 [2021-03-11 20:25:02,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:02,837 INFO L129 PetriNetUnfolder]: 22/101 cut-off events. [2021-03-11 20:25:02,838 INFO L130 PetriNetUnfolder]: For 110/142 co-relation queries the response was YES. [2021-03-11 20:25:02,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 101 events. 22/101 cut-off events. For 110/142 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 460 event pairs, 1 based on Foata normal form. 12/112 useless extension candidates. Maximal degree in co-relation 294. Up to 36 conditions per place. [2021-03-11 20:25:02,838 INFO L132 encePairwiseOnDemand]: 112/117 looper letters, 7 selfloop transitions, 6 changer transitions 6/34 dead transitions. [2021-03-11 20:25:02,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 215 flow [2021-03-11 20:25:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:25:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:25:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 380 transitions. [2021-03-11 20:25:02,846 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.811965811965812 [2021-03-11 20:25:02,846 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 380 transitions. [2021-03-11 20:25:02,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 380 transitions. [2021-03-11 20:25:02,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:02,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 380 transitions. [2021-03-11 20:25:02,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 20:25:02,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:02,848 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:02,848 INFO L185 Difference]: Start difference. First operand has 32 places, 26 transitions, 134 flow. Second operand 4 states and 380 transitions. [2021-03-11 20:25:02,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 215 flow [2021-03-11 20:25:02,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:25:02,850 INFO L241 Difference]: Finished difference. Result has 37 places, 26 transitions, 165 flow [2021-03-11 20:25:02,851 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2021-03-11 20:25:02,851 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2021-03-11 20:25:02,851 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 165 flow [2021-03-11 20:25:02,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 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 20:25:02,851 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,851 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:25:02,852 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash -801276456, now seen corresponding path program 1 times [2021-03-11 20:25:02,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612077243] [2021-03-11 20:25:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:25:02,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:02,891 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:25:02,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:25:02,897 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 20:25:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612077243] [2021-03-11 20:25:02,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:25:02,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856313226] [2021-03-11 20:25:02,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:25:02,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:25:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:25:02,899 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2021-03-11 20:25:02,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 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 20:25:02,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2021-03-11 20:25:02,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:02,917 INFO L129 PetriNetUnfolder]: 8/58 cut-off events. [2021-03-11 20:25:02,917 INFO L130 PetriNetUnfolder]: For 107/157 co-relation queries the response was YES. [2021-03-11 20:25:02,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 58 events. 8/58 cut-off events. For 107/157 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 209 event pairs, 0 based on Foata normal form. 15/72 useless extension candidates. Maximal degree in co-relation 216. Up to 19 conditions per place. [2021-03-11 20:25:02,917 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 7 selfloop transitions, 11 changer transitions 0/27 dead transitions. [2021-03-11 20:25:02,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 208 flow [2021-03-11 20:25:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:25:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:25:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2021-03-11 20:25:02,919 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2021-03-11 20:25:02,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2021-03-11 20:25:02,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2021-03-11 20:25:02,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:02,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2021-03-11 20:25:02,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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 20:25:02,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:02,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:02,921 INFO L185 Difference]: Start difference. First operand has 37 places, 26 transitions, 165 flow. Second operand 4 states and 366 transitions. [2021-03-11 20:25:02,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 208 flow [2021-03-11 20:25:02,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 188 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-03-11 20:25:02,924 INFO L241 Difference]: Finished difference. Result has 39 places, 27 transitions, 193 flow [2021-03-11 20:25:02,924 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2021-03-11 20:25:02,924 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2021-03-11 20:25:02,924 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 193 flow [2021-03-11 20:25:02,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 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 20:25:02,924 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:02,924 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:02,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:25:02,925 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:02,925 INFO L82 PathProgramCache]: Analyzing trace with hash 919454189, now seen corresponding path program 1 times [2021-03-11 20:25:02,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:02,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235107028] [2021-03-11 20:25:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:02,973 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:25:02,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:25:02,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:02,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:25:02,977 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 20:25:02,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235107028] [2021-03-11 20:25:02,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:02,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:25:02,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782590762] [2021-03-11 20:25:02,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:25:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:02,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:25:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:25:02,982 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 117 [2021-03-11 20:25:02,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 193 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) [2021-03-11 20:25:02,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:02,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 117 [2021-03-11 20:25:02,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:03,017 INFO L129 PetriNetUnfolder]: 64/168 cut-off events. [2021-03-11 20:25:03,018 INFO L130 PetriNetUnfolder]: For 207/235 co-relation queries the response was YES. [2021-03-11 20:25:03,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 168 events. 64/168 cut-off events. For 207/235 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 827 event pairs, 23 based on Foata normal form. 3/156 useless extension candidates. Maximal degree in co-relation 478. Up to 118 conditions per place. [2021-03-11 20:25:03,019 INFO L132 encePairwiseOnDemand]: 112/117 looper letters, 4 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2021-03-11 20:25:03,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 215 flow [2021-03-11 20:25:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:25:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:25:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2021-03-11 20:25:03,021 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.811965811965812 [2021-03-11 20:25:03,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2021-03-11 20:25:03,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2021-03-11 20:25:03,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:03,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2021-03-11 20:25:03,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 20:25:03,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:03,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:03,024 INFO L185 Difference]: Start difference. First operand has 39 places, 27 transitions, 193 flow. Second operand 3 states and 285 transitions. [2021-03-11 20:25:03,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 215 flow [2021-03-11 20:25:03,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 209 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-11 20:25:03,030 INFO L241 Difference]: Finished difference. Result has 42 places, 30 transitions, 213 flow [2021-03-11 20:25:03,030 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2021-03-11 20:25:03,030 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2021-03-11 20:25:03,030 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 213 flow [2021-03-11 20:25:03,030 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) [2021-03-11 20:25:03,030 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:03,030 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:03,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:25:03,031 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2034478460, now seen corresponding path program 1 times [2021-03-11 20:25:03,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:03,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497555177] [2021-03-11 20:25:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:03,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:03,080 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:25:03,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:25:03,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:25:03,083 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 20:25:03,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497555177] [2021-03-11 20:25:03,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:03,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:25:03,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130826136] [2021-03-11 20:25:03,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:25:03,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:25:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:25:03,088 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 117 [2021-03-11 20:25:03,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 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 20:25:03,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:03,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 117 [2021-03-11 20:25:03,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:03,117 INFO L129 PetriNetUnfolder]: 33/109 cut-off events. [2021-03-11 20:25:03,117 INFO L130 PetriNetUnfolder]: For 147/203 co-relation queries the response was YES. [2021-03-11 20:25:03,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 109 events. 33/109 cut-off events. For 147/203 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 442 event pairs, 3 based on Foata normal form. 32/138 useless extension candidates. Maximal degree in co-relation 396. Up to 72 conditions per place. [2021-03-11 20:25:03,118 INFO L132 encePairwiseOnDemand]: 112/117 looper letters, 4 selfloop transitions, 7 changer transitions 4/33 dead transitions. [2021-03-11 20:25:03,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 33 transitions, 247 flow [2021-03-11 20:25:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:25:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:25:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 380 transitions. [2021-03-11 20:25:03,123 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.811965811965812 [2021-03-11 20:25:03,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 380 transitions. [2021-03-11 20:25:03,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 380 transitions. [2021-03-11 20:25:03,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:03,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 380 transitions. [2021-03-11 20:25:03,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 20:25:03,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:03,125 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 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 20:25:03,127 INFO L185 Difference]: Start difference. First operand has 42 places, 30 transitions, 213 flow. Second operand 4 states and 380 transitions. [2021-03-11 20:25:03,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 33 transitions, 247 flow [2021-03-11 20:25:03,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 237 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-11 20:25:03,129 INFO L241 Difference]: Finished difference. Result has 44 places, 29 transitions, 219 flow [2021-03-11 20:25:03,130 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2021-03-11 20:25:03,130 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2021-03-11 20:25:03,130 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 219 flow [2021-03-11 20:25:03,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 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 20:25:03,131 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:03,131 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:03,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:25:03,131 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 638173255, now seen corresponding path program 1 times [2021-03-11 20:25:03,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:03,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783650905] [2021-03-11 20:25:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:03,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:03,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:03,196 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:25:03,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:25:03,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:25:03,200 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 20:25:03,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783650905] [2021-03-11 20:25:03,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:03,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:25:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788159672] [2021-03-11 20:25:03,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:25:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:25:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:25:03,202 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 117 [2021-03-11 20:25:03,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 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 20:25:03,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:03,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 117 [2021-03-11 20:25:03,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:03,231 INFO L129 PetriNetUnfolder]: 16/59 cut-off events. [2021-03-11 20:25:03,231 INFO L130 PetriNetUnfolder]: For 128/225 co-relation queries the response was YES. [2021-03-11 20:25:03,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 59 events. 16/59 cut-off events. For 128/225 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 166 event pairs, 0 based on Foata normal form. 40/97 useless extension candidates. Maximal degree in co-relation 259. Up to 39 conditions per place. [2021-03-11 20:25:03,232 INFO L132 encePairwiseOnDemand]: 112/117 looper letters, 1 selfloop transitions, 10 changer transitions 7/29 dead transitions. [2021-03-11 20:25:03,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 29 transitions, 241 flow [2021-03-11 20:25:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:25:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:25:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2021-03-11 20:25:03,234 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8068376068376069 [2021-03-11 20:25:03,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2021-03-11 20:25:03,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2021-03-11 20:25:03,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:03,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2021-03-11 20:25:03,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 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 20:25:03,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 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 20:25:03,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 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 20:25:03,237 INFO L185 Difference]: Start difference. First operand has 44 places, 29 transitions, 219 flow. Second operand 5 states and 472 transitions. [2021-03-11 20:25:03,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 29 transitions, 241 flow [2021-03-11 20:25:03,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 29 transitions, 209 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-03-11 20:25:03,241 INFO L241 Difference]: Finished difference. Result has 45 places, 22 transitions, 158 flow [2021-03-11 20:25:03,241 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=22} [2021-03-11 20:25:03,241 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2021-03-11 20:25:03,241 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 22 transitions, 158 flow [2021-03-11 20:25:03,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 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 20:25:03,241 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:25:03,242 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:25:03,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:25:03,242 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:25:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:25:03,242 INFO L82 PathProgramCache]: Analyzing trace with hash 53452007, now seen corresponding path program 1 times [2021-03-11 20:25:03,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:25:03,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695315972] [2021-03-11 20:25:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:25:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:25:03,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:25:03,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:25:03,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:25:03,283 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 20:25:03,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695315972] [2021-03-11 20:25:03,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:25:03,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:25:03,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192564530] [2021-03-11 20:25:03,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:25:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:25:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:25:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:25:03,285 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 117 [2021-03-11 20:25:03,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 22 transitions, 158 flow. Second operand has 3 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) [2021-03-11 20:25:03,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:25:03,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 117 [2021-03-11 20:25:03,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:25:03,292 INFO L129 PetriNetUnfolder]: 6/28 cut-off events. [2021-03-11 20:25:03,292 INFO L130 PetriNetUnfolder]: For 46/48 co-relation queries the response was YES. [2021-03-11 20:25:03,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 28 events. 6/28 cut-off events. For 46/48 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 2/30 useless extension candidates. Maximal degree in co-relation 106. Up to 13 conditions per place. [2021-03-11 20:25:03,293 INFO L132 encePairwiseOnDemand]: 115/117 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2021-03-11 20:25:03,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 21 transitions, 158 flow [2021-03-11 20:25:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:25:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:25:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2021-03-11 20:25:03,294 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8490028490028491 [2021-03-11 20:25:03,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2021-03-11 20:25:03,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2021-03-11 20:25:03,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:25:03,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2021-03-11 20:25:03,295 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) [2021-03-11 20:25:03,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:03,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:25:03,296 INFO L185 Difference]: Start difference. First operand has 45 places, 22 transitions, 158 flow. Second operand 3 states and 298 transitions. [2021-03-11 20:25:03,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 21 transitions, 158 flow [2021-03-11 20:25:03,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 98 flow, removed 7 selfloop flow, removed 13 redundant places. [2021-03-11 20:25:03,297 INFO L241 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2021-03-11 20:25:03,298 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2021-03-11 20:25:03,298 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2021-03-11 20:25:03,298 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2021-03-11 20:25:03,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 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) [2021-03-11 20:25:03,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:25:03,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:25:03 BasicIcfg [2021-03-11 20:25:03,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:25:03,305 INFO L168 Benchmark]: Toolchain (without parser) took 4380.78 ms. Allocated memory was 255.9 MB in the beginning and 457.2 MB in the end (delta: 201.3 MB). Free memory was 234.5 MB in the beginning and 213.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:25:03,305 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 20:25:03,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 452.65 ms. Allocated memory was 255.9 MB in the beginning and 379.6 MB in the end (delta: 123.7 MB). Free memory was 233.9 MB in the beginning and 342.3 MB in the end (delta: -108.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:25:03,308 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.90 ms. Allocated memory is still 379.6 MB. Free memory was 342.3 MB in the beginning and 339.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:25:03,309 INFO L168 Benchmark]: Boogie Preprocessor took 18.69 ms. Allocated memory is still 379.6 MB. Free memory was 339.8 MB in the beginning and 338.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:25:03,310 INFO L168 Benchmark]: RCFGBuilder took 469.03 ms. Allocated memory is still 379.6 MB. Free memory was 338.1 MB in the beginning and 317.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:25:03,310 INFO L168 Benchmark]: TraceAbstraction took 3394.90 ms. Allocated memory was 379.6 MB in the beginning and 457.2 MB in the end (delta: 77.6 MB). Free memory was 316.4 MB in the beginning and 213.5 MB in the end (delta: 103.0 MB). Peak memory consumption was 183.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:25:03,314 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 452.65 ms. Allocated memory was 255.9 MB in the beginning and 379.6 MB in the end (delta: 123.7 MB). Free memory was 233.9 MB in the beginning and 342.3 MB in the end (delta: -108.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.90 ms. Allocated memory is still 379.6 MB. Free memory was 342.3 MB in the beginning and 339.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.69 ms. Allocated memory is still 379.6 MB. Free memory was 339.8 MB in the beginning and 338.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 469.03 ms. Allocated memory is still 379.6 MB. Free memory was 338.1 MB in the beginning and 317.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3394.90 ms. Allocated memory was 379.6 MB in the beginning and 457.2 MB in the end (delta: 77.6 MB). Free memory was 316.4 MB in the beginning and 213.5 MB in the end (delta: 103.0 MB). Peak memory consumption was 183.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2088.6ms, 66 PlacesBefore, 26 PlacesAfterwards, 57 TransitionsBefore, 17 TransitionsAfterwards, 804 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 45 TotalNumberOfCompositions, 1442 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 932, positive: 864, positive conditional: 0, positive unconditional: 864, negative: 68, negative conditional: 0, negative unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 601, positive: 566, positive conditional: 0, positive unconditional: 566, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 601, positive: 554, positive conditional: 0, positive unconditional: 554, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 47, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 197, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 138, negative conditional: 0, negative unconditional: 138, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 932, positive: 298, positive conditional: 0, positive unconditional: 298, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 601, unknown conditional: 0, unknown unconditional: 601] , Statistics on independence cache: Total cache size (in pairs): 68, Positive cache size: 58, Positive conditional cache size: 0, Positive unconditional cache size: 58, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - 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 4 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3293.1ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 395.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2158.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 7 SDslu, 7 SDs, 0 SdLazy, 72 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred in iteration=8, InterpolantAutomatonStates: 35, 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: 18.9ms SsaConstructionTime, 167.0ms SatisfiabilityAnalysisTime, 366.1ms InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 370 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...