/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-ext/23_lu-fig2.fixed.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 15:16:01,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 15:16:01,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 15:16:02,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 15:16:02,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 15:16:02,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 15:16:02,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 15:16:02,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 15:16:02,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 15:16:02,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 15:16:02,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 15:16:02,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 15:16:02,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 15:16:02,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 15:16:02,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 15:16:02,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 15:16:02,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 15:16:02,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 15:16:02,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 15:16:02,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 15:16:02,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 15:16:02,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 15:16:02,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 15:16:02,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 15:16:02,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 15:16:02,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 15:16:02,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 15:16:02,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 15:16:02,093 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 15:16:02,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 15:16:02,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 15:16:02,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 15:16:02,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 15:16:02,130 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 15:16:02,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 15:16:02,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 15:16:02,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 15:16:02,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 15:16:02,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 15:16:02,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 15:16:02,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 15:16:02,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 15:16:02,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 15:16:02,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 15:16:02,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 15:16:02,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 15:16:02,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 15:16:02,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 15:16:02,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 15:16:02,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 15:16:02,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 15:16:02,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 15:16:02,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 15:16:02,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 15:16:02,136 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 15:16:02,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 15:16:02,136 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 15:16:02,136 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 15:16:02,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 15:16:02,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 15:16:02,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 15:16:02,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 15:16:02,436 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 15:16:02,436 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 15:16:02,437 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i [2020-10-09 15:16:02,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120135be4/643c21ca56404311aeab900a660e409f/FLAG284d09ff7 [2020-10-09 15:16:03,055 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 15:16:03,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i [2020-10-09 15:16:03,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120135be4/643c21ca56404311aeab900a660e409f/FLAG284d09ff7 [2020-10-09 15:16:03,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120135be4/643c21ca56404311aeab900a660e409f [2020-10-09 15:16:03,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 15:16:03,309 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 15:16:03,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 15:16:03,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 15:16:03,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 15:16:03,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e38152c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03, skipping insertion in model container [2020-10-09 15:16:03,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 15:16:03,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 15:16:03,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 15:16:03,808 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 15:16:03,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 15:16:03,917 INFO L208 MainTranslator]: Completed translation [2020-10-09 15:16:03,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03 WrapperNode [2020-10-09 15:16:03,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 15:16:03,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 15:16:03,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 15:16:03,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 15:16:03,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 15:16:03,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 15:16:03,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 15:16:03,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 15:16:03,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (1/1) ... [2020-10-09 15:16:03,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 15:16:03,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 15:16:03,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 15:16:03,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 15:16:03,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (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 15:16:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-09 15:16:04,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-09 15:16:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 15:16:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 15:16:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 15:16:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 15:16:04,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 15:16:04,061 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 15:16:04,665 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 15:16:04,665 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-09 15:16:04,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 03:16:04 BoogieIcfgContainer [2020-10-09 15:16:04,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 15:16:04,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 15:16:04,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 15:16:04,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 15:16:04,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 03:16:03" (1/3) ... [2020-10-09 15:16:04,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@465d0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 03:16:04, skipping insertion in model container [2020-10-09 15:16:04,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:16:03" (2/3) ... [2020-10-09 15:16:04,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@465d0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 03:16:04, skipping insertion in model container [2020-10-09 15:16:04,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 03:16:04" (3/3) ... [2020-10-09 15:16:04,676 INFO L111 eAbstractionObserver]: Analyzing ICFG 23_lu-fig2.fixed.i [2020-10-09 15:16:04,687 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 15:16:04,694 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-09 15:16:04,696 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 15:16:04,718 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,718 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,718 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,719 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,719 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,719 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,720 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,720 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,720 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,720 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,721 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,721 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,721 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,721 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,722 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,722 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,722 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,726 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,726 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:16:04,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 15:16:04,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 15:16:04,764 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 15:16:04,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 15:16:04,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 15:16:04,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 15:16:04,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 15:16:04,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 15:16:04,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 15:16:04,776 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 91 flow [2020-10-09 15:16:04,808 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2020-10-09 15:16:04,808 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:16:04,812 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 2/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2020-10-09 15:16:04,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 91 flow [2020-10-09 15:16:04,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 87 flow [2020-10-09 15:16:04,826 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2020-10-09 15:16:04,827 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:16:04,827 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:16:04,828 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 15:16:04,829 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:16:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:16:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash -648751144, now seen corresponding path program 1 times [2020-10-09 15:16:04,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:16:04,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930968469] [2020-10-09 15:16:04,850 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 15:16:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:16:04,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 15:16:04,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:16:04,975 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 15:16:04,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:16:04,982 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 15:16:04,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930968469] [2020-10-09 15:16:04,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:16:04,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 15:16:04,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683136509] [2020-10-09 15:16:04,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:16:04,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:16:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:16:05,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:16:05,054 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 43 [2020-10-09 15:16:05,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 87 flow. Second operand 3 states. [2020-10-09 15:16:05,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:16:05,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 43 [2020-10-09 15:16:05,057 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:16:05,075 INFO L129 PetriNetUnfolder]: 1/40 cut-off events. [2020-10-09 15:16:05,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:16:05,076 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 1/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 3/42 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2020-10-09 15:16:05,078 INFO L132 encePairwiseOnDemand]: 38/43 looper letters, 0 selfloop transitions, 2 changer transitions 9/40 dead transitions. [2020-10-09 15:16:05,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 89 flow [2020-10-09 15:16:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:16:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:16:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2020-10-09 15:16:05,093 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.937984496124031 [2020-10-09 15:16:05,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2020-10-09 15:16:05,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2020-10-09 15:16:05,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:16:05,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2020-10-09 15:16:05,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:16:05,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:16:05,107 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:16:05,110 INFO L185 Difference]: Start difference. First operand has 44 places, 42 transitions, 87 flow. Second operand 3 states and 121 transitions. [2020-10-09 15:16:05,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 89 flow [2020-10-09 15:16:05,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 15:16:05,118 INFO L241 Difference]: Finished difference. Result has 44 places, 31 transitions, 68 flow [2020-10-09 15:16:05,121 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2020-10-09 15:16:05,122 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2020-10-09 15:16:05,122 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 68 flow [2020-10-09 15:16:05,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:16:05,122 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:16:05,123 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] [2020-10-09 15:16:05,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 15:16:05,334 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:16:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:16:05,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1520181366, now seen corresponding path program 1 times [2020-10-09 15:16:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:16:05,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835053997] [2020-10-09 15:16:05,338 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 15:16:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:16:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 15:16:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:16:05,422 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 15:16:05,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:16:05,432 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 15:16:05,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835053997] [2020-10-09 15:16:05,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:16:05,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:16:05,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403957071] [2020-10-09 15:16:05,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:16:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:16:05,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:16:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:16:05,476 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 43 [2020-10-09 15:16:05,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 68 flow. Second operand 3 states. [2020-10-09 15:16:05,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:16:05,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 43 [2020-10-09 15:16:05,479 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:16:05,503 INFO L129 PetriNetUnfolder]: 2/33 cut-off events. [2020-10-09 15:16:05,503 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:16:05,504 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 2/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2020-10-09 15:16:05,504 INFO L132 encePairwiseOnDemand]: 39/43 looper letters, 2 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2020-10-09 15:16:05,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 80 flow [2020-10-09 15:16:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:16:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:16:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2020-10-09 15:16:05,508 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2020-10-09 15:16:05,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2020-10-09 15:16:05,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2020-10-09 15:16:05,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:16:05,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2020-10-09 15:16:05,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:16:05,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:16:05,515 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:16:05,515 INFO L185 Difference]: Start difference. First operand has 44 places, 31 transitions, 68 flow. Second operand 3 states and 120 transitions. [2020-10-09 15:16:05,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 80 flow [2020-10-09 15:16:05,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 76 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 15:16:05,521 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 76 flow [2020-10-09 15:16:05,521 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-09 15:16:05,522 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2020-10-09 15:16:05,522 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 76 flow [2020-10-09 15:16:05,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:16:05,522 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:16:05,522 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] [2020-10-09 15:16:05,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 15:16:05,740 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:16:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:16:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -764214644, now seen corresponding path program 1 times [2020-10-09 15:16:05,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:16:05,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975416544] [2020-10-09 15:16:05,743 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 15:16:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:16:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 15:16:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:16:05,846 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 15:16:05,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:16:05,858 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-09 15:16:05,858 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 15:16:05,873 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 15:16:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975416544] [2020-10-09 15:16:05,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:16:05,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 15:16:05,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029164821] [2020-10-09 15:16:05,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 15:16:05,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:16:05,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 15:16:05,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 15:16:05,888 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 43 [2020-10-09 15:16:05,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 76 flow. Second operand 4 states. [2020-10-09 15:16:05,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:16:05,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 43 [2020-10-09 15:16:05,889 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:16:05,910 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2020-10-09 15:16:05,910 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-09 15:16:05,911 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 31 events. 1/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2020-10-09 15:16:05,911 INFO L132 encePairwiseOnDemand]: 39/43 looper letters, 1 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2020-10-09 15:16:05,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 86 flow [2020-10-09 15:16:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:16:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:16:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2020-10-09 15:16:05,913 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2020-10-09 15:16:05,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2020-10-09 15:16:05,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2020-10-09 15:16:05,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:16:05,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2020-10-09 15:16:05,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:16:05,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:16:05,916 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:16:05,916 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 76 flow. Second operand 3 states and 117 transitions. [2020-10-09 15:16:05,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 86 flow [2020-10-09 15:16:05,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 82 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 15:16:05,918 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 80 flow [2020-10-09 15:16:05,918 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-09 15:16:05,919 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2020-10-09 15:16:05,919 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 80 flow [2020-10-09 15:16:05,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 15:16:05,919 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:16:05,919 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] [2020-10-09 15:16:06,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 15:16:06,130 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:16:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:16:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash -693294547, now seen corresponding path program 1 times [2020-10-09 15:16:06,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:16:06,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829288274] [2020-10-09 15:16:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:16:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:16:06,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 15:16:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:16:06,207 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 15:16:06,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:16:06,216 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 15:16:06,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829288274] [2020-10-09 15:16:06,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:16:06,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 15:16:06,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568827018] [2020-10-09 15:16:06,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:16:06,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:16:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:16:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:16:06,251 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 43 [2020-10-09 15:16:06,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states. [2020-10-09 15:16:06,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:16:06,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 43 [2020-10-09 15:16:06,255 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:16:06,267 INFO L129 PetriNetUnfolder]: 1/30 cut-off events. [2020-10-09 15:16:06,267 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:16:06,268 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 30 events. 1/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 26. Up to 3 conditions per place. [2020-10-09 15:16:06,268 INFO L132 encePairwiseOnDemand]: 41/43 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2020-10-09 15:16:06,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 82 flow [2020-10-09 15:16:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:16:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:16:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2020-10-09 15:16:06,271 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2020-10-09 15:16:06,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2020-10-09 15:16:06,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2020-10-09 15:16:06,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:16:06,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2020-10-09 15:16:06,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:16:06,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:16:06,274 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:16:06,275 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 117 transitions. [2020-10-09 15:16:06,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 82 flow [2020-10-09 15:16:06,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 15:16:06,277 INFO L241 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2020-10-09 15:16:06,277 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2020-10-09 15:16:06,277 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2020-10-09 15:16:06,277 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2020-10-09 15:16:06,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:16:06,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 15:16:06,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 03:16:06 BasicIcfg [2020-10-09 15:16:06,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 15:16:06,503 INFO L168 Benchmark]: Toolchain (without parser) took 3191.99 ms. Allocated memory was 251.7 MB in the beginning and 359.1 MB in the end (delta: 107.5 MB). Free memory was 207.4 MB in the beginning and 270.2 MB in the end (delta: -62.8 MB). Peak memory consumption was 44.7 MB. Max. memory is 14.2 GB. [2020-10-09 15:16:06,503 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 15:16:06,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 608.20 ms. Allocated memory was 251.7 MB in the beginning and 313.5 MB in the end (delta: 61.9 MB). Free memory was 207.4 MB in the beginning and 269.5 MB in the end (delta: -62.1 MB). Peak memory consumption was 33.7 MB. Max. memory is 14.2 GB. [2020-10-09 15:16:06,507 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.45 ms. Allocated memory is still 313.5 MB. Free memory was 269.5 MB in the beginning and 267.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 15:16:06,511 INFO L168 Benchmark]: Boogie Preprocessor took 28.61 ms. Allocated memory is still 313.5 MB. Free memory was 267.0 MB in the beginning and 266.3 MB in the end (delta: 629.1 kB). Peak memory consumption was 629.1 kB. Max. memory is 14.2 GB. [2020-10-09 15:16:06,517 INFO L168 Benchmark]: RCFGBuilder took 671.60 ms. Allocated memory is still 313.5 MB. Free memory was 266.3 MB in the beginning and 221.4 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 14.2 GB. [2020-10-09 15:16:06,518 INFO L168 Benchmark]: TraceAbstraction took 1830.16 ms. Allocated memory was 313.5 MB in the beginning and 359.1 MB in the end (delta: 45.6 MB). Free memory was 221.4 MB in the beginning and 270.2 MB in the end (delta: -48.8 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 15:16:06,523 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 608.20 ms. Allocated memory was 251.7 MB in the beginning and 313.5 MB in the end (delta: 61.9 MB). Free memory was 207.4 MB in the beginning and 269.5 MB in the end (delta: -62.1 MB). Peak memory consumption was 33.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.45 ms. Allocated memory is still 313.5 MB. Free memory was 269.5 MB in the beginning and 267.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.61 ms. Allocated memory is still 313.5 MB. Free memory was 267.0 MB in the beginning and 266.3 MB in the end (delta: 629.1 kB). Peak memory consumption was 629.1 kB. Max. memory is 14.2 GB. * RCFGBuilder took 671.60 ms. Allocated memory is still 313.5 MB. Free memory was 266.3 MB in the beginning and 221.4 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1830.16 ms. Allocated memory was 313.5 MB in the beginning and 359.1 MB in the end (delta: 45.6 MB). Free memory was 221.4 MB in the beginning and 270.2 MB in the end (delta: -48.8 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 696]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 710]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 42 locations, 2 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: 1.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 5 SDslu, 0 SDs, 0 SdLazy, 23 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 178 ConstructedInterpolants, 0 QuantifiedInterpolants, 8231 SizeOfPredicates, 3 NumberOfNonLiveVariables, 298 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...