/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/sync01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:45:57,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:45:57,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:45:57,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:45:57,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:45:57,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:45:57,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:45:57,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:45:57,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:45:57,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:45:57,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:45:57,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:45:57,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:45:57,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:45:57,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:45:57,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:45:57,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:45:57,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:45:57,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:45:57,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:45:57,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:45:57,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:45:57,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:45:57,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:45:57,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:45:57,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:45:57,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:45:57,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:45:57,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:45:57,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:45:57,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:45:57,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:45:57,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:45:57,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:45:57,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:45:57,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:45:57,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:45:57,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:45:57,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:45:57,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:45:57,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:45:57,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:45:57,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:45:57,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:45:57,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:45:57,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:45:57,240 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:45:57,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:45:57,240 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:45:57,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:45:57,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:45:57,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:45:57,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:45:57,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:45:57,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:45:57,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:45:57,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:45:57,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:45:57,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:45:57,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:45:57,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:45:57,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:45:57,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:45:57,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:45:57,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:45:57,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:45:57,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:45:57,244 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:45:57,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:45:57,244 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:45:57,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:45:57,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:45:57,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:45:57,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:45:57,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:45:57,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:45:57,628 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:45:57,629 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sync01.i [2020-10-09 14:45:57,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f5a538b/bd4978855f8944b68dc55aae32d6a671/FLAG1f9170659 [2020-10-09 14:45:58,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:45:58,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/sync01.i [2020-10-09 14:45:58,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f5a538b/bd4978855f8944b68dc55aae32d6a671/FLAG1f9170659 [2020-10-09 14:45:58,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f5a538b/bd4978855f8944b68dc55aae32d6a671 [2020-10-09 14:45:58,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:45:58,614 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:45:58,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:45:58,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:45:58,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:45:58,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:45:58" (1/1) ... [2020-10-09 14:45:58,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6f3548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:58, skipping insertion in model container [2020-10-09 14:45:58,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:45:58" (1/1) ... [2020-10-09 14:45:58,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:45:58,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:45:59,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:45:59,415 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:45:59,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:45:59,599 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:45:59,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59 WrapperNode [2020-10-09 14:45:59,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:45:59,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:45:59,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:45:59,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:45:59,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:45:59,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:45:59,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:45:59,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:45:59,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (1/1) ... [2020-10-09 14:45:59,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:45:59,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:45:59,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:45:59,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:45:59,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (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 [2020-10-09 14:45:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:45:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:45:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 14:45:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-10-09 14:45:59,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-10-09 14:45:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-10-09 14:45:59,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-10-09 14:45:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:45:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-09 14:45:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-09 14:45:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:45:59,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:45:59,800 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:46:00,211 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:46:00,211 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:46:00,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:46:00 BoogieIcfgContainer [2020-10-09 14:46:00,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:46:00,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:46:00,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:46:00,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:46:00,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:45:58" (1/3) ... [2020-10-09 14:46:00,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96cc03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:46:00, skipping insertion in model container [2020-10-09 14:46:00,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:45:59" (2/3) ... [2020-10-09 14:46:00,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96cc03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:46:00, skipping insertion in model container [2020-10-09 14:46:00,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:46:00" (3/3) ... [2020-10-09 14:46:00,224 INFO L111 eAbstractionObserver]: Analyzing ICFG sync01.i [2020-10-09 14:46:00,238 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:46:00,247 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:46:00,248 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:46:00,280 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,281 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,281 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,281 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,282 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,282 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,282 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,283 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,283 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,285 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,285 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,286 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,286 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,286 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,287 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,287 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,287 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,288 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,288 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,288 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,289 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,289 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,293 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,293 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,293 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,293 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,299 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,299 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,300 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,300 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,300 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,300 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,301 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:46:00,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:46:00,353 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:46:00,353 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:46:00,353 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:46:00,353 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:46:00,353 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:46:00,354 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:46:00,354 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:46:00,354 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:46:00,371 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 204 flow [2020-10-09 14:46:00,468 INFO L129 PetriNetUnfolder]: 6/91 cut-off events. [2020-10-09 14:46:00,469 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:46:00,483 INFO L80 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 91 events. 6/91 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 55. Up to 3 conditions per place. [2020-10-09 14:46:00,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 91 transitions, 204 flow [2020-10-09 14:46:00,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 80 transitions, 178 flow [2020-10-09 14:46:00,527 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2020-10-09 14:46:00,528 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:46:00,528 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:00,530 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:00,530 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 756901473, now seen corresponding path program 1 times [2020-10-09 14:46:00,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:00,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479819086] [2020-10-09 14:46:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 14:46:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479819086] [2020-10-09 14:46:00,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:00,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 14:46:00,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112039571] [2020-10-09 14:46:00,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 14:46:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 14:46:00,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 14:46:00,831 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 91 [2020-10-09 14:46:00,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 178 flow. Second operand 2 states. [2020-10-09 14:46:00,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:00,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 91 [2020-10-09 14:46:00,835 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:00,873 INFO L129 PetriNetUnfolder]: 3/80 cut-off events. [2020-10-09 14:46:00,873 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:46:00,874 INFO L80 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 80 events. 3/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 2/80 useless extension candidates. Maximal degree in co-relation 88. Up to 3 conditions per place. [2020-10-09 14:46:00,876 INFO L132 encePairwiseOnDemand]: 89/91 looper letters, 0 selfloop transitions, 0 changer transitions 0/78 dead transitions. [2020-10-09 14:46:00,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 174 flow [2020-10-09 14:46:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 14:46:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 14:46:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 178 transitions. [2020-10-09 14:46:00,894 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.978021978021978 [2020-10-09 14:46:00,895 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 178 transitions. [2020-10-09 14:46:00,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 178 transitions. [2020-10-09 14:46:00,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:00,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 178 transitions. [2020-10-09 14:46:00,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 14:46:00,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 14:46:00,911 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 14:46:00,914 INFO L185 Difference]: Start difference. First operand has 81 places, 80 transitions, 178 flow. Second operand 2 states and 178 transitions. [2020-10-09 14:46:00,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 174 flow [2020-10-09 14:46:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 14:46:00,926 INFO L241 Difference]: Finished difference. Result has 78 places, 78 transitions, 162 flow [2020-10-09 14:46:00,929 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2020-10-09 14:46:00,931 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2020-10-09 14:46:00,931 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 162 flow [2020-10-09 14:46:00,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 14:46:00,931 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:00,932 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:01,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:46:01,142 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:01,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1107056639, now seen corresponding path program 1 times [2020-10-09 14:46:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:01,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553059057] [2020-10-09 14:46:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 14:46:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:01,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:01,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553059057] [2020-10-09 14:46:01,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:01,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 14:46:01,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961186946] [2020-10-09 14:46:01,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 14:46:01,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:01,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 14:46:01,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 14:46:01,425 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 91 [2020-10-09 14:46:01,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 162 flow. Second operand 3 states. [2020-10-09 14:46:01,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:01,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 91 [2020-10-09 14:46:01,426 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:01,450 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2020-10-09 14:46:01,450 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:46:01,451 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 89 events. 3/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 100. Up to 6 conditions per place. [2020-10-09 14:46:01,452 INFO L132 encePairwiseOnDemand]: 86/91 looper letters, 4 selfloop transitions, 2 changer transitions 1/75 dead transitions. [2020-10-09 14:46:01,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 170 flow [2020-10-09 14:46:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 14:46:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 14:46:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2020-10-09 14:46:01,455 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9120879120879121 [2020-10-09 14:46:01,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2020-10-09 14:46:01,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2020-10-09 14:46:01,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:01,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2020-10-09 14:46:01,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 14:46:01,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 14:46:01,460 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 14:46:01,460 INFO L185 Difference]: Start difference. First operand has 78 places, 78 transitions, 162 flow. Second operand 3 states and 249 transitions. [2020-10-09 14:46:01,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 170 flow [2020-10-09 14:46:01,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:46:01,464 INFO L241 Difference]: Finished difference. Result has 79 places, 74 transitions, 166 flow [2020-10-09 14:46:01,464 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2020-10-09 14:46:01,465 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2020-10-09 14:46:01,465 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 166 flow [2020-10-09 14:46:01,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 14:46:01,466 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:01,466 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:01,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:46:01,679 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash -694999137, now seen corresponding path program 1 times [2020-10-09 14:46:01,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:01,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400488055] [2020-10-09 14:46:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:46:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 14:46:01,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:01,830 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-09 14:46:01,831 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 14:46:01,840 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 14:46:01,841 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 14:46:01,842 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-10-09 14:46:01,883 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-09 14:46:01,887 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 14:46:01,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 14:46:01,893 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 14:46:01,894 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-09 14:46:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:01,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400488055] [2020-10-09 14:46:01,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:01,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2020-10-09 14:46:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121228317] [2020-10-09 14:46:01,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 14:46:01,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 14:46:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-09 14:46:02,961 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 91 [2020-10-09 14:46:02,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 166 flow. Second operand 7 states. [2020-10-09 14:46:02,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:02,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 91 [2020-10-09 14:46:02,962 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:03,014 INFO L129 PetriNetUnfolder]: 1/83 cut-off events. [2020-10-09 14:46:03,014 INFO L130 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2020-10-09 14:46:03,015 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 83 events. 1/83 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 2/84 useless extension candidates. Maximal degree in co-relation 102. Up to 4 conditions per place. [2020-10-09 14:46:03,015 INFO L132 encePairwiseOnDemand]: 86/91 looper letters, 3 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2020-10-09 14:46:03,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 177 flow [2020-10-09 14:46:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 14:46:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 14:46:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2020-10-09 14:46:03,019 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2020-10-09 14:46:03,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2020-10-09 14:46:03,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2020-10-09 14:46:03,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:03,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2020-10-09 14:46:03,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 14:46:03,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 14:46:03,025 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 14:46:03,025 INFO L185 Difference]: Start difference. First operand has 79 places, 74 transitions, 166 flow. Second operand 5 states and 403 transitions. [2020-10-09 14:46:03,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 177 flow [2020-10-09 14:46:03,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 173 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:46:03,028 INFO L241 Difference]: Finished difference. Result has 81 places, 73 transitions, 167 flow [2020-10-09 14:46:03,029 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2020-10-09 14:46:03,029 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 0 predicate places. [2020-10-09 14:46:03,029 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 167 flow [2020-10-09 14:46:03,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 14:46:03,029 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:03,030 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:03,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:46:03,252 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash -153169513, now seen corresponding path program 2 times [2020-10-09 14:46:03,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:03,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962032837] [2020-10-09 14:46:03,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:46:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 14:46:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:03,333 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-09 14:46:03,333 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 14:46:03,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 14:46:03,336 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 14:46:03,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-09 14:46:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:03,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:03,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962032837] [2020-10-09 14:46:03,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 14:46:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746174405] [2020-10-09 14:46:03,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:46:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:46:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:46:03,475 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 91 [2020-10-09 14:46:03,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 167 flow. Second operand 4 states. [2020-10-09 14:46:03,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:03,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 91 [2020-10-09 14:46:03,476 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:03,502 INFO L129 PetriNetUnfolder]: 2/91 cut-off events. [2020-10-09 14:46:03,503 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:46:03,503 INFO L80 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 91 events. 2/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 4/95 useless extension candidates. Maximal degree in co-relation 116. Up to 7 conditions per place. [2020-10-09 14:46:03,504 INFO L132 encePairwiseOnDemand]: 85/91 looper letters, 2 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2020-10-09 14:46:03,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 183 flow [2020-10-09 14:46:03,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 14:46:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 14:46:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2020-10-09 14:46:03,506 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8974358974358975 [2020-10-09 14:46:03,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2020-10-09 14:46:03,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2020-10-09 14:46:03,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:03,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2020-10-09 14:46:03,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 14:46:03,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 14:46:03,509 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 14:46:03,510 INFO L185 Difference]: Start difference. First operand has 81 places, 73 transitions, 167 flow. Second operand 3 states and 245 transitions. [2020-10-09 14:46:03,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 183 flow [2020-10-09 14:46:03,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 175 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 14:46:03,513 INFO L241 Difference]: Finished difference. Result has 79 places, 73 transitions, 171 flow [2020-10-09 14:46:03,514 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2020-10-09 14:46:03,514 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2020-10-09 14:46:03,514 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 171 flow [2020-10-09 14:46:03,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:46:03,514 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:46:03,515 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:46:03,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 14:46:03,729 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:46:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:46:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1318139949, now seen corresponding path program 3 times [2020-10-09 14:46:03,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:46:03,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31771287] [2020-10-09 14:46:03,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 14:46:03,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-09 14:46:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:46:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:46:03,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:46:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:03,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:46:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:46:03,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31771287] [2020-10-09 14:46:03,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:46:03,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2020-10-09 14:46:03,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105356275] [2020-10-09 14:46:03,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 14:46:03,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:46:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 14:46:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-09 14:46:04,098 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2020-10-09 14:46:04,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 171 flow. Second operand 8 states. [2020-10-09 14:46:04,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:46:04,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2020-10-09 14:46:04,100 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:46:04,206 INFO L129 PetriNetUnfolder]: 3/94 cut-off events. [2020-10-09 14:46:04,206 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:46:04,207 INFO L80 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 94 events. 3/94 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 1 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 132. Up to 9 conditions per place. [2020-10-09 14:46:04,207 INFO L132 encePairwiseOnDemand]: 81/91 looper letters, 0 selfloop transitions, 0 changer transitions 71/71 dead transitions. [2020-10-09 14:46:04,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 193 flow [2020-10-09 14:46:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 14:46:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 14:46:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 662 transitions. [2020-10-09 14:46:04,217 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8083028083028083 [2020-10-09 14:46:04,218 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 662 transitions. [2020-10-09 14:46:04,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 662 transitions. [2020-10-09 14:46:04,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:46:04,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 662 transitions. [2020-10-09 14:46:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 14:46:04,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 14:46:04,223 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 14:46:04,223 INFO L185 Difference]: Start difference. First operand has 79 places, 73 transitions, 171 flow. Second operand 9 states and 662 transitions. [2020-10-09 14:46:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 193 flow [2020-10-09 14:46:04,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 71 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 14:46:04,228 INFO L241 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2020-10-09 14:46:04,229 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2020-10-09 14:46:04,229 INFO L341 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2020-10-09 14:46:04,229 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2020-10-09 14:46:04,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 14:46:04,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 14:46:04,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:46:04 BasicIcfg [2020-10-09 14:46:04,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:46:04,453 INFO L168 Benchmark]: Toolchain (without parser) took 5839.08 ms. Allocated memory was 249.6 MB in the beginning and 433.1 MB in the end (delta: 183.5 MB). Free memory was 201.4 MB in the beginning and 361.3 MB in the end (delta: -159.9 MB). Peak memory consumption was 23.6 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:04,454 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 249.6 MB. Free memory was 225.1 MB in the beginning and 224.3 MB in the end (delta: 839.1 kB). Peak memory consumption was 839.1 kB. Max. memory is 14.2 GB. [2020-10-09 14:46:04,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 984.66 ms. Allocated memory was 249.6 MB in the beginning and 308.3 MB in the end (delta: 58.7 MB). Free memory was 201.4 MB in the beginning and 242.8 MB in the end (delta: -41.3 MB). Peak memory consumption was 32.1 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:04,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.69 ms. Allocated memory is still 308.3 MB. Free memory was 242.8 MB in the beginning and 240.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:04,457 INFO L168 Benchmark]: Boogie Preprocessor took 55.04 ms. Allocated memory is still 308.3 MB. Free memory was 240.2 MB in the beginning and 238.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:04,458 INFO L168 Benchmark]: RCFGBuilder took 492.32 ms. Allocated memory is still 308.3 MB. Free memory was 238.5 MB in the beginning and 211.4 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 14.2 GB. [2020-10-09 14:46:04,459 INFO L168 Benchmark]: TraceAbstraction took 4235.41 ms. Allocated memory was 308.3 MB in the beginning and 433.1 MB in the end (delta: 124.8 MB). Free memory was 210.6 MB in the beginning and 361.3 MB in the end (delta: -150.8 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:46:04,464 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 249.6 MB. Free memory was 225.1 MB in the beginning and 224.3 MB in the end (delta: 839.1 kB). Peak memory consumption was 839.1 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 984.66 ms. Allocated memory was 249.6 MB in the beginning and 308.3 MB in the end (delta: 58.7 MB). Free memory was 201.4 MB in the beginning and 242.8 MB in the end (delta: -41.3 MB). Peak memory consumption was 32.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 65.69 ms. Allocated memory is still 308.3 MB. Free memory was 242.8 MB in the beginning and 240.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 55.04 ms. Allocated memory is still 308.3 MB. Free memory was 240.2 MB in the beginning and 238.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 492.32 ms. Allocated memory is still 308.3 MB. Free memory was 238.5 MB in the beginning and 211.4 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4235.41 ms. Allocated memory was 308.3 MB in the beginning and 433.1 MB in the end (delta: 124.8 MB). Free memory was 210.6 MB in the beginning and 361.3 MB in the end (delta: -150.8 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 947]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 31 SDtfs, 179 SDslu, 97 SDs, 0 SdLazy, 300 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 675 GetRequests, 650 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 670 ConstructedInterpolants, 0 QuantifiedInterpolants, 93130 SizeOfPredicates, 13 NumberOfNonLiveVariables, 845 ConjunctsInSsa, 18 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...