/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-lit/qw2004-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:22:13,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:22:13,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:22:13,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:22:13,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:22:13,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:22:13,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:22:13,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:22:13,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:22:13,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:22:13,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:22:13,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:22:13,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:22:13,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:22:13,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:22:13,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:22:13,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:22:13,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:22:13,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:22:13,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:22:13,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:22:13,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:22:13,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:22:13,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:22:13,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 18:22:13,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:22:13,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:22:13,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:22:13,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:22:13,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:22:13,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:22:13,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:22:13,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:22:13,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:22:13,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:22:13,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:22:13,876 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 18:22:13,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:22:13,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:22:13,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:22:13,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:22:13,900 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:22:13,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:22:13,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:22:13,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:22:13,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:22:13,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:22:13,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:22:13,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:22:13,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:22:13,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:22:13,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:22:13,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:22:13,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:22:13,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:22:13,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:22:13,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:22:13,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:22:13,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:22:13,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:22:13,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:22:13,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:22:13,904 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:22:13,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:22:13,904 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:22:13,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:22:13,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:22:14,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:22:14,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:22:14,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:22:14,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:22:14,226 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:22:14,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/qw2004-1.i [2020-10-09 18:22:14,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a6fe0dfb/934163df1f9545d4a958188332caf09f/FLAG341a893cd [2020-10-09 18:22:14,798 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:22:14,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-1.i [2020-10-09 18:22:14,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a6fe0dfb/934163df1f9545d4a958188332caf09f/FLAG341a893cd [2020-10-09 18:22:15,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a6fe0dfb/934163df1f9545d4a958188332caf09f [2020-10-09 18:22:15,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:22:15,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:22:15,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:22:15,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:22:15,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:22:15,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@896f2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15, skipping insertion in model container [2020-10-09 18:22:15,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:22:15,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:22:15,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:22:15,665 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:22:15,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:22:15,797 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:22:15,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15 WrapperNode [2020-10-09 18:22:15,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:22:15,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:22:15,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:22:15,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:22:15,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:22:15,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:22:15,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:22:15,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:22:15,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (1/1) ... [2020-10-09 18:22:15,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:22:15,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:22:15,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:22:15,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:22:15,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (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 18:22:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2020-10-09 18:22:15,939 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2020-10-09 18:22:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:22:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 18:22:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:22:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:22:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 18:22:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:22:15,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:22:15,942 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 18:22:16,353 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:22:16,353 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-09 18:22:16,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:22:16 BoogieIcfgContainer [2020-10-09 18:22:16,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:22:16,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:22:16,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:22:16,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:22:16,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:22:15" (1/3) ... [2020-10-09 18:22:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3652137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:22:16, skipping insertion in model container [2020-10-09 18:22:16,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:22:15" (2/3) ... [2020-10-09 18:22:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3652137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:22:16, skipping insertion in model container [2020-10-09 18:22:16,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:22:16" (3/3) ... [2020-10-09 18:22:16,363 INFO L111 eAbstractionObserver]: Analyzing ICFG qw2004-1.i [2020-10-09 18:22:16,374 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:22:16,381 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:22:16,382 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:22:16,407 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,407 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,407 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,407 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,408 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,408 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,408 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,409 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,409 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,409 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,409 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,409 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,410 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,410 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,410 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,410 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,411 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,411 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,411 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,411 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,412 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,412 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,416 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,417 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,417 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,417 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,417 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,418 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,418 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,418 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,426 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,426 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,427 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,427 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,428 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,428 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,428 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,428 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,428 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,429 WARN L313 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,429 WARN L313 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:22:16,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 18:22:16,467 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:22:16,468 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:22:16,468 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:22:16,468 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:22:16,468 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:22:16,468 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:22:16,468 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:22:16,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:22:16,481 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 84 places, 86 transitions, 177 flow [2020-10-09 18:22:16,526 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2020-10-09 18:22:16,526 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:22:16,533 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 69. Up to 3 conditions per place. [2020-10-09 18:22:16,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 86 transitions, 177 flow [2020-10-09 18:22:16,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 173 flow [2020-10-09 18:22:16,562 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2020-10-09 18:22:16,562 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:22:16,562 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:16,563 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] [2020-10-09 18:22:16,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1051248567, now seen corresponding path program 1 times [2020-10-09 18:22:16,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:16,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401130340] [2020-10-09 18:22:16,584 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 18:22:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 18:22:16,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:16,771 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 18:22:16,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:16,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 18:22:16,814 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 18:22:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401130340] [2020-10-09 18:22:16,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:16,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:22:16,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488428908] [2020-10-09 18:22:16,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:22:16,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:22:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:22:16,932 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 86 [2020-10-09 18:22:16,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 173 flow. Second operand 5 states. [2020-10-09 18:22:16,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:16,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 86 [2020-10-09 18:22:16,936 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:17,046 INFO L129 PetriNetUnfolder]: 7/140 cut-off events. [2020-10-09 18:22:17,047 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:22:17,048 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 140 events. 7/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 293 event pairs, 0 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 137. Up to 6 conditions per place. [2020-10-09 18:22:17,050 INFO L132 encePairwiseOnDemand]: 79/86 looper letters, 7 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2020-10-09 18:22:17,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 90 transitions, 211 flow [2020-10-09 18:22:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:22:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:22:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 559 transitions. [2020-10-09 18:22:17,069 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2020-10-09 18:22:17,069 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 559 transitions. [2020-10-09 18:22:17,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 559 transitions. [2020-10-09 18:22:17,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:17,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 559 transitions. [2020-10-09 18:22:17,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:22:17,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:22:17,089 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:22:17,092 INFO L185 Difference]: Start difference. First operand has 83 places, 85 transitions, 173 flow. Second operand 7 states and 559 transitions. [2020-10-09 18:22:17,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 90 transitions, 211 flow [2020-10-09 18:22:17,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:22:17,102 INFO L241 Difference]: Finished difference. Result has 91 places, 88 transitions, 207 flow [2020-10-09 18:22:17,105 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2020-10-09 18:22:17,106 INFO L341 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2020-10-09 18:22:17,106 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 207 flow [2020-10-09 18:22:17,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:22:17,107 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:17,107 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] [2020-10-09 18:22:17,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:22:17,318 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash -107574420, now seen corresponding path program 1 times [2020-10-09 18:22:17,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:17,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300444803] [2020-10-09 18:22:17,320 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 18:22:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 18:22:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:17,394 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 18:22:17,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:17,407 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 18:22:17,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300444803] [2020-10-09 18:22:17,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:17,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 18:22:17,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764450491] [2020-10-09 18:22:17,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 18:22:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 18:22:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 18:22:17,443 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 86 [2020-10-09 18:22:17,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 207 flow. Second operand 3 states. [2020-10-09 18:22:17,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:17,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 86 [2020-10-09 18:22:17,444 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:17,477 INFO L129 PetriNetUnfolder]: 7/158 cut-off events. [2020-10-09 18:22:17,477 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-10-09 18:22:17,479 INFO L80 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 158 events. 7/158 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 373 event pairs, 0 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 170. Up to 6 conditions per place. [2020-10-09 18:22:17,480 INFO L132 encePairwiseOnDemand]: 84/86 looper letters, 3 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2020-10-09 18:22:17,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 88 transitions, 215 flow [2020-10-09 18:22:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 18:22:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 18:22:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2020-10-09 18:22:17,482 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9496124031007752 [2020-10-09 18:22:17,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2020-10-09 18:22:17,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2020-10-09 18:22:17,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:17,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2020-10-09 18:22:17,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 18:22:17,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 18:22:17,485 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 18:22:17,485 INFO L185 Difference]: Start difference. First operand has 91 places, 88 transitions, 207 flow. Second operand 3 states and 245 transitions. [2020-10-09 18:22:17,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 88 transitions, 215 flow [2020-10-09 18:22:17,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 88 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:22:17,490 INFO L241 Difference]: Finished difference. Result has 94 places, 88 transitions, 212 flow [2020-10-09 18:22:17,490 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2020-10-09 18:22:17,491 INFO L341 CegarLoopForPetriNet]: 83 programPoint places, 11 predicate places. [2020-10-09 18:22:17,491 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 212 flow [2020-10-09 18:22:17,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 18:22:17,491 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:17,491 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] [2020-10-09 18:22:17,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:22:17,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 731978887, now seen corresponding path program 1 times [2020-10-09 18:22:17,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:17,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382365530] [2020-10-09 18:22:17,712 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 18:22:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:17,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 18:22:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:17,784 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 18:22:17,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:17,792 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 18:22:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382365530] [2020-10-09 18:22:17,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:17,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 18:22:17,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939707843] [2020-10-09 18:22:17,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 18:22:17,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:17,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 18:22:17,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 18:22:17,824 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 86 [2020-10-09 18:22:17,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 212 flow. Second operand 3 states. [2020-10-09 18:22:17,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:17,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 86 [2020-10-09 18:22:17,825 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:17,862 INFO L129 PetriNetUnfolder]: 11/213 cut-off events. [2020-10-09 18:22:17,862 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2020-10-09 18:22:17,865 INFO L80 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 213 events. 11/213 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 727 event pairs, 0 based on Foata normal form. 2/204 useless extension candidates. Maximal degree in co-relation 233. Up to 10 conditions per place. [2020-10-09 18:22:17,866 INFO L132 encePairwiseOnDemand]: 83/86 looper letters, 3 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2020-10-09 18:22:17,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 222 flow [2020-10-09 18:22:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 18:22:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 18:22:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2020-10-09 18:22:17,868 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9418604651162791 [2020-10-09 18:22:17,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2020-10-09 18:22:17,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2020-10-09 18:22:17,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:17,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2020-10-09 18:22:17,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 18:22:17,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 18:22:17,870 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 18:22:17,870 INFO L185 Difference]: Start difference. First operand has 94 places, 88 transitions, 212 flow. Second operand 3 states and 243 transitions. [2020-10-09 18:22:17,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 222 flow [2020-10-09 18:22:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 88 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:22:17,874 INFO L241 Difference]: Finished difference. Result has 96 places, 88 transitions, 219 flow [2020-10-09 18:22:17,875 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2020-10-09 18:22:17,875 INFO L341 CegarLoopForPetriNet]: 83 programPoint places, 13 predicate places. [2020-10-09 18:22:17,875 INFO L481 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 219 flow [2020-10-09 18:22:17,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 18:22:17,876 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:17,876 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] [2020-10-09 18:22:18,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 18:22:18,096 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:18,097 INFO L82 PathProgramCache]: Analyzing trace with hash -877971716, now seen corresponding path program 2 times [2020-10-09 18:22:18,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:18,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10765409] [2020-10-09 18:22:18,097 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 18:22:18,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 18:22:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:22:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:22:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:18,184 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 18:22:18,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:18,192 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 18:22:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10765409] [2020-10-09 18:22:18,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:18,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:22:18,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370054517] [2020-10-09 18:22:18,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:22:18,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:22:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:22:18,231 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 86 [2020-10-09 18:22:18,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 219 flow. Second operand 5 states. [2020-10-09 18:22:18,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:18,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 86 [2020-10-09 18:22:18,232 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:18,331 INFO L129 PetriNetUnfolder]: 50/395 cut-off events. [2020-10-09 18:22:18,331 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2020-10-09 18:22:18,333 INFO L80 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 395 events. 50/395 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2079 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 506. Up to 52 conditions per place. [2020-10-09 18:22:18,334 INFO L132 encePairwiseOnDemand]: 79/86 looper letters, 6 selfloop transitions, 2 changer transitions 42/100 dead transitions. [2020-10-09 18:22:18,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 287 flow [2020-10-09 18:22:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 18:22:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 18:22:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 616 transitions. [2020-10-09 18:22:18,337 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8953488372093024 [2020-10-09 18:22:18,337 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 616 transitions. [2020-10-09 18:22:18,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 616 transitions. [2020-10-09 18:22:18,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:18,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 616 transitions. [2020-10-09 18:22:18,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 18:22:18,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 18:22:18,343 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 18:22:18,343 INFO L185 Difference]: Start difference. First operand has 96 places, 88 transitions, 219 flow. Second operand 8 states and 616 transitions. [2020-10-09 18:22:18,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 287 flow [2020-10-09 18:22:18,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 18:22:18,347 INFO L241 Difference]: Finished difference. Result has 106 places, 58 transitions, 156 flow [2020-10-09 18:22:18,347 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=106, PETRI_TRANSITIONS=58} [2020-10-09 18:22:18,348 INFO L341 CegarLoopForPetriNet]: 83 programPoint places, 23 predicate places. [2020-10-09 18:22:18,348 INFO L481 AbstractCegarLoop]: Abstraction has has 106 places, 58 transitions, 156 flow [2020-10-09 18:22:18,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:22:18,348 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:18,348 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] [2020-10-09 18:22:18,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 18:22:18,569 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1888580479, now seen corresponding path program 1 times [2020-10-09 18:22:18,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:18,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244359872] [2020-10-09 18:22:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:22:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:22:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:18,674 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 18:22:18,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:18,710 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 18:22:18,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244359872] [2020-10-09 18:22:18,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:18,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-09 18:22:18,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828798230] [2020-10-09 18:22:18,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 18:22:18,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 18:22:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-09 18:22:18,825 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2020-10-09 18:22:18,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 58 transitions, 156 flow. Second operand 5 states. [2020-10-09 18:22:18,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:18,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2020-10-09 18:22:18,826 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:18,860 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2020-10-09 18:22:18,860 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-09 18:22:18,861 INFO L80 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 82 events. 0/82 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2020-10-09 18:22:18,861 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 8 selfloop transitions, 0 changer transitions 5/61 dead transitions. [2020-10-09 18:22:18,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 186 flow [2020-10-09 18:22:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 18:22:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-09 18:22:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 463 transitions. [2020-10-09 18:22:18,863 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8972868217054264 [2020-10-09 18:22:18,863 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 463 transitions. [2020-10-09 18:22:18,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 463 transitions. [2020-10-09 18:22:18,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:18,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 463 transitions. [2020-10-09 18:22:18,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-09 18:22:18,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-09 18:22:18,866 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-09 18:22:18,866 INFO L185 Difference]: Start difference. First operand has 106 places, 58 transitions, 156 flow. Second operand 6 states and 463 transitions. [2020-10-09 18:22:18,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 186 flow [2020-10-09 18:22:18,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 160 flow, removed 8 selfloop flow, removed 11 redundant places. [2020-10-09 18:22:18,869 INFO L241 Difference]: Finished difference. Result has 73 places, 56 transitions, 132 flow [2020-10-09 18:22:18,870 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2020-10-09 18:22:18,870 INFO L341 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2020-10-09 18:22:18,870 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 132 flow [2020-10-09 18:22:18,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 18:22:18,870 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:22:18,870 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] [2020-10-09 18:22:19,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 18:22:19,081 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:22:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:22:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash -30657750, now seen corresponding path program 1 times [2020-10-09 18:22:19,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:22:19,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615012995] [2020-10-09 18:22:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 18:22:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:22:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:22:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:22:19,234 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 18:22:19,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:22:19,305 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 18:22:19,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615012995] [2020-10-09 18:22:19,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:22:19,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2020-10-09 18:22:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522528407] [2020-10-09 18:22:19,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:22:19,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:22:19,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:22:19,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:22:19,633 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 86 [2020-10-09 18:22:19,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 132 flow. Second operand 8 states. [2020-10-09 18:22:19,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:22:19,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 86 [2020-10-09 18:22:19,634 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:22:19,724 INFO L129 PetriNetUnfolder]: 0/62 cut-off events. [2020-10-09 18:22:19,724 INFO L130 PetriNetUnfolder]: For 1/6 co-relation queries the response was YES. [2020-10-09 18:22:19,724 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 62 events. 0/62 cut-off events. For 1/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 2/64 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2020-10-09 18:22:19,725 INFO L132 encePairwiseOnDemand]: 78/86 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2020-10-09 18:22:19,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 184 flow [2020-10-09 18:22:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:22:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:22:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 645 transitions. [2020-10-09 18:22:19,728 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2020-10-09 18:22:19,729 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 645 transitions. [2020-10-09 18:22:19,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 645 transitions. [2020-10-09 18:22:19,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:22:19,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 645 transitions. [2020-10-09 18:22:19,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:22:19,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:22:19,732 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:22:19,733 INFO L185 Difference]: Start difference. First operand has 73 places, 56 transitions, 132 flow. Second operand 9 states and 645 transitions. [2020-10-09 18:22:19,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 184 flow [2020-10-09 18:22:19,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 172 flow, removed 4 selfloop flow, removed 6 redundant places. [2020-10-09 18:22:19,735 INFO L241 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2020-10-09 18:22:19,737 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2020-10-09 18:22:19,737 INFO L341 CegarLoopForPetriNet]: 83 programPoint places, -18 predicate places. [2020-10-09 18:22:19,737 INFO L481 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2020-10-09 18:22:19,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:22:19,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 18:22:19,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 06:22:19 BasicIcfg [2020-10-09 18:22:19,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 18:22:19,961 INFO L168 Benchmark]: Toolchain (without parser) took 4827.24 ms. Allocated memory was 248.0 MB in the beginning and 368.1 MB in the end (delta: 120.1 MB). Free memory was 204.2 MB in the beginning and 196.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 128.0 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:19,961 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 248.0 MB. Free memory is still 224.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:22:19,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.87 ms. Allocated memory was 248.0 MB in the beginning and 304.1 MB in the end (delta: 56.1 MB). Free memory was 204.2 MB in the beginning and 254.8 MB in the end (delta: -50.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:19,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 304.1 MB. Free memory was 254.8 MB in the beginning and 252.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:19,963 INFO L168 Benchmark]: Boogie Preprocessor took 24.29 ms. Allocated memory is still 304.1 MB. Free memory is still 252.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:22:19,964 INFO L168 Benchmark]: RCFGBuilder took 482.76 ms. Allocated memory is still 304.1 MB. Free memory was 252.3 MB in the beginning and 225.1 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:19,965 INFO L168 Benchmark]: TraceAbstraction took 3602.33 ms. Allocated memory was 304.1 MB in the beginning and 368.1 MB in the end (delta: 64.0 MB). Free memory was 225.1 MB in the beginning and 196.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 92.8 MB. Max. memory is 14.2 GB. [2020-10-09 18:22:19,969 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 248.0 MB. Free memory is still 224.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 662.87 ms. Allocated memory was 248.0 MB in the beginning and 304.1 MB in the end (delta: 56.1 MB). Free memory was 204.2 MB in the beginning and 254.8 MB in the end (delta: -50.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 304.1 MB. Free memory was 254.8 MB in the beginning and 252.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.29 ms. Allocated memory is still 304.1 MB. Free memory is still 252.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 482.76 ms. Allocated memory is still 304.1 MB. Free memory was 252.3 MB in the beginning and 225.1 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 14.2 GB. * TraceAbstraction took 3602.33 ms. Allocated memory was 304.1 MB in the beginning and 368.1 MB in the end (delta: 64.0 MB). Free memory was 225.1 MB in the beginning and 196.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 92.8 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 679]: 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 2 procedures, 81 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: 3.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 88 SDslu, 230 SDs, 0 SdLazy, 216 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 606 GetRequests, 563 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred in iteration=3, 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, 0.4s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 592 ConstructedInterpolants, 0 QuantifiedInterpolants, 54708 SizeOfPredicates, 14 NumberOfNonLiveVariables, 622 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...