/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 03:52:12,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 03:52:12,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 03:52:12,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 03:52:12,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 03:52:12,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 03:52:12,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 03:52:12,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 03:52:12,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 03:52:12,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 03:52:12,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 03:52:13,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 03:52:13,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 03:52:13,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 03:52:13,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 03:52:13,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 03:52:13,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 03:52:13,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 03:52:13,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 03:52:13,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 03:52:13,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 03:52:13,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 03:52:13,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 03:52:13,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 03:52:13,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 03:52:13,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 03:52:13,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 03:52:13,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 03:52:13,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 03:52:13,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 03:52:13,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 03:52:13,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 03:52:13,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 03:52:13,092 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 03:52:13,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 03:52:13,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 03:52:13,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 03:52:13,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 03:52:13,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 03:52:13,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 03:52:13,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 03:52:13,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 03:52:13,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 03:52:13,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 03:52:13,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 03:52:13,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 03:52:13,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 03:52:13,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 03:52:13,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 03:52:13,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 03:52:13,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:52:13,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 03:52:13,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 03:52:13,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 03:52:13,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 03:52:13,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 03:52:13,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 03:52:13,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 03:52:13,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 03:52:13,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 03:52:13,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 03:52:13,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 03:52:13,405 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 03:52:13,406 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i [2020-10-16 03:52:13,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45aa44095/2ab50d28939c449f83c3759c71780131/FLAG4b62df05b [2020-10-16 03:52:14,031 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 03:52:14,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i [2020-10-16 03:52:14,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45aa44095/2ab50d28939c449f83c3759c71780131/FLAG4b62df05b [2020-10-16 03:52:14,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45aa44095/2ab50d28939c449f83c3759c71780131 [2020-10-16 03:52:14,443 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 03:52:14,444 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 03:52:14,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 03:52:14,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 03:52:14,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 03:52:14,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:52:14" (1/1) ... [2020-10-16 03:52:14,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bef41a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:14, skipping insertion in model container [2020-10-16 03:52:14,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:52:14" (1/1) ... [2020-10-16 03:52:14,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 03:52:14,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 03:52:14,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:52:14,934 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 03:52:14,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:52:15,054 INFO L208 MainTranslator]: Completed translation [2020-10-16 03:52:15,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15 WrapperNode [2020-10-16 03:52:15,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 03:52:15,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 03:52:15,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 03:52:15,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 03:52:15,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 03:52:15,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 03:52:15,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 03:52:15,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 03:52:15,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (1/1) ... [2020-10-16 03:52:15,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 03:52:15,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 03:52:15,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 03:52:15,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 03:52:15,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (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 [2020-10-16 03:52:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-16 03:52:15,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-16 03:52:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 03:52:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 03:52:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 03:52:15,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 03:52:15,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 03:52:15,214 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 03:52:15,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 03:52:15,873 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-16 03:52:15,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:52:15 BoogieIcfgContainer [2020-10-16 03:52:15,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 03:52:15,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 03:52:15,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 03:52:15,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 03:52:15,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:52:14" (1/3) ... [2020-10-16 03:52:15,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2216b2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:52:15, skipping insertion in model container [2020-10-16 03:52:15,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:52:15" (2/3) ... [2020-10-16 03:52:15,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2216b2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:52:15, skipping insertion in model container [2020-10-16 03:52:15,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:52:15" (3/3) ... [2020-10-16 03:52:15,883 INFO L111 eAbstractionObserver]: Analyzing ICFG 23_lu-fig2.fixed.i [2020-10-16 03:52:15,895 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 03:52:15,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-16 03:52:15,904 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 03:52:15,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,927 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,927 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,928 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,928 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,929 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,929 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,929 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,929 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,930 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,930 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,930 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,930 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,931 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,931 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,931 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,935 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,935 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,936 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,936 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,936 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,936 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,937 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,937 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,937 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:52:15,960 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 03:52:15,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 03:52:15,982 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 03:52:15,982 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 03:52:15,982 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 03:52:15,982 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 03:52:15,982 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 03:52:15,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 03:52:15,983 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 03:52:15,994 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 91 flow [2020-10-16 03:52:16,023 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2020-10-16 03:52:16,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:52:16,027 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. [2020-10-16 03:52:16,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 91 flow [2020-10-16 03:52:16,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 87 flow [2020-10-16 03:52:16,036 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 03:52:16,039 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 42 transitions, 87 flow [2020-10-16 03:52:16,042 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 42 transitions, 87 flow [2020-10-16 03:52:16,042 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 44 places, 42 transitions, 87 flow [2020-10-16 03:52:16,055 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2020-10-16 03:52:16,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:52:16,056 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 23 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. [2020-10-16 03:52:16,058 INFO L117 LiptonReduction]: Number of co-enabled transitions 378 [2020-10-16 03:52:17,122 INFO L132 LiptonReduction]: Checked pairs total: 818 [2020-10-16 03:52:17,122 INFO L134 LiptonReduction]: Total number of compositions: 32 [2020-10-16 03:52:17,125 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1091 [2020-10-16 03:52:17,131 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 03:52:17,132 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:52:17,132 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:52:17,133 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 03:52:17,133 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:52:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:52:17,139 INFO L82 PathProgramCache]: Analyzing trace with hash 10250802, now seen corresponding path program 1 times [2020-10-16 03:52:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:52:17,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831005558] [2020-10-16 03:52:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:52:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:52:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:52:17,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831005558] [2020-10-16 03:52:17,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:52:17,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 03:52:17,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100233155] [2020-10-16 03:52:17,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 03:52:17,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:52:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 03:52:17,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 03:52:17,370 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 75 [2020-10-16 03:52:17,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 13 transitions, 29 flow. Second operand 3 states. [2020-10-16 03:52:17,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:52:17,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 75 [2020-10-16 03:52:17,376 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:52:17,403 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2020-10-16 03:52:17,403 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:52:17,404 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 15 events. 2/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 18. Up to 5 conditions per place. [2020-10-16 03:52:17,405 INFO L132 encePairwiseOnDemand]: 71/75 looper letters, 2 selfloop transitions, 2 changer transitions 2/13 dead transitions. [2020-10-16 03:52:17,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 13 transitions, 39 flow [2020-10-16 03:52:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 03:52:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 03:52:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2020-10-16 03:52:17,421 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2020-10-16 03:52:17,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2020-10-16 03:52:17,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2020-10-16 03:52:17,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:52:17,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2020-10-16 03:52:17,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 03:52:17,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 03:52:17,436 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 03:52:17,438 INFO L185 Difference]: Start difference. First operand has 16 places, 13 transitions, 29 flow. Second operand 3 states and 190 transitions. [2020-10-16 03:52:17,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 13 transitions, 39 flow [2020-10-16 03:52:17,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 13 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 03:52:17,444 INFO L241 Difference]: Finished difference. Result has 16 places, 10 transitions, 26 flow [2020-10-16 03:52:17,447 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2020-10-16 03:52:17,448 INFO L342 CegarLoopForPetriNet]: 16 programPoint places, 0 predicate places. [2020-10-16 03:52:17,448 INFO L481 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 26 flow [2020-10-16 03:52:17,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 03:52:17,448 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:52:17,448 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2020-10-16 03:52:17,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 03:52:17,449 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:52:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:52:17,450 INFO L82 PathProgramCache]: Analyzing trace with hash 317781255, now seen corresponding path program 1 times [2020-10-16 03:52:17,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:52:17,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441256794] [2020-10-16 03:52:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:52:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:52:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:52:17,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441256794] [2020-10-16 03:52:17,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:52:17,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:52:17,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457608877] [2020-10-16 03:52:17,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 03:52:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:52:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 03:52:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 03:52:17,494 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 75 [2020-10-16 03:52:17,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 26 flow. Second operand 3 states. [2020-10-16 03:52:17,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:52:17,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 75 [2020-10-16 03:52:17,495 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:52:17,507 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2020-10-16 03:52:17,508 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:52:17,508 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 16. Up to 4 conditions per place. [2020-10-16 03:52:17,508 INFO L132 encePairwiseOnDemand]: 71/75 looper letters, 2 selfloop transitions, 2 changer transitions 1/11 dead transitions. [2020-10-16 03:52:17,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 11 transitions, 38 flow [2020-10-16 03:52:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 03:52:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 03:52:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2020-10-16 03:52:17,511 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.84 [2020-10-16 03:52:17,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2020-10-16 03:52:17,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2020-10-16 03:52:17,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:52:17,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2020-10-16 03:52:17,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 03:52:17,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 03:52:17,515 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 03:52:17,515 INFO L185 Difference]: Start difference. First operand has 16 places, 10 transitions, 26 flow. Second operand 3 states and 189 transitions. [2020-10-16 03:52:17,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 11 transitions, 38 flow [2020-10-16 03:52:17,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 34 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 03:52:17,517 INFO L241 Difference]: Finished difference. Result has 16 places, 10 transitions, 34 flow [2020-10-16 03:52:17,517 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=34, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2020-10-16 03:52:17,518 INFO L342 CegarLoopForPetriNet]: 16 programPoint places, 0 predicate places. [2020-10-16 03:52:17,518 INFO L481 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 34 flow [2020-10-16 03:52:17,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 03:52:17,518 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:52:17,518 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:52:17,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 03:52:17,519 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:52:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:52:17,519 INFO L82 PathProgramCache]: Analyzing trace with hash 445216329, now seen corresponding path program 1 times [2020-10-16 03:52:17,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:52:17,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796059997] [2020-10-16 03:52:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:52:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:52:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:52:17,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796059997] [2020-10-16 03:52:17,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:52:17,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:52:17,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685444854] [2020-10-16 03:52:17,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 03:52:17,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:52:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 03:52:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 03:52:17,577 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 75 [2020-10-16 03:52:17,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 34 flow. Second operand 4 states. [2020-10-16 03:52:17,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:52:17,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 75 [2020-10-16 03:52:17,577 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:52:17,613 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-10-16 03:52:17,613 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 03:52:17,614 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 3/16 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 2/18 useless extension candidates. Maximal degree in co-relation 34. Up to 5 conditions per place. [2020-10-16 03:52:17,614 INFO L132 encePairwiseOnDemand]: 69/75 looper letters, 2 selfloop transitions, 6 changer transitions 0/11 dead transitions. [2020-10-16 03:52:17,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 54 flow [2020-10-16 03:52:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 03:52:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 03:52:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2020-10-16 03:52:17,618 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.704 [2020-10-16 03:52:17,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 264 transitions. [2020-10-16 03:52:17,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 264 transitions. [2020-10-16 03:52:17,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:52:17,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 264 transitions. [2020-10-16 03:52:17,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 03:52:17,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 03:52:17,621 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 03:52:17,621 INFO L185 Difference]: Start difference. First operand has 16 places, 10 transitions, 34 flow. Second operand 5 states and 264 transitions. [2020-10-16 03:52:17,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 54 flow [2020-10-16 03:52:17,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 11 transitions, 50 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 03:52:17,623 INFO L241 Difference]: Finished difference. Result has 18 places, 10 transitions, 42 flow [2020-10-16 03:52:17,623 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=42, PETRI_PLACES=18, PETRI_TRANSITIONS=10} [2020-10-16 03:52:17,623 INFO L342 CegarLoopForPetriNet]: 16 programPoint places, 2 predicate places. [2020-10-16 03:52:17,623 INFO L481 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 42 flow [2020-10-16 03:52:17,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 03:52:17,623 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:52:17,624 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:52:17,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 03:52:17,624 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:52:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:52:17,624 INFO L82 PathProgramCache]: Analyzing trace with hash 764279846, now seen corresponding path program 1 times [2020-10-16 03:52:17,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:52:17,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657871166] [2020-10-16 03:52:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:52:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:52:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:52:17,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657871166] [2020-10-16 03:52:17,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:52:17,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:52:17,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082707082] [2020-10-16 03:52:17,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 03:52:17,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:52:17,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 03:52:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 03:52:17,709 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 75 [2020-10-16 03:52:17,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 10 transitions, 42 flow. Second operand 4 states. [2020-10-16 03:52:17,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:52:17,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 75 [2020-10-16 03:52:17,710 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:52:17,720 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 03:52:17,721 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 03:52:17,722 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 9 events. 1/9 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/10 useless extension candidates. Maximal degree in co-relation 15. Up to 3 conditions per place. [2020-10-16 03:52:17,722 INFO L132 encePairwiseOnDemand]: 72/75 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2020-10-16 03:52:17,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 9 transitions, 42 flow [2020-10-16 03:52:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 03:52:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 03:52:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 247 transitions. [2020-10-16 03:52:17,726 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8233333333333334 [2020-10-16 03:52:17,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 247 transitions. [2020-10-16 03:52:17,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 247 transitions. [2020-10-16 03:52:17,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:52:17,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 247 transitions. [2020-10-16 03:52:17,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 03:52:17,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 03:52:17,731 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 03:52:17,731 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 42 flow. Second operand 4 states and 247 transitions. [2020-10-16 03:52:17,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 9 transitions, 42 flow [2020-10-16 03:52:17,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 31 flow, removed 1 selfloop flow, removed 4 redundant places. [2020-10-16 03:52:17,732 INFO L241 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2020-10-16 03:52:17,733 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2020-10-16 03:52:17,733 INFO L342 CegarLoopForPetriNet]: 16 programPoint places, 0 predicate places. [2020-10-16 03:52:17,733 INFO L481 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2020-10-16 03:52:17,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 03:52:17,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 03:52:17,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:52:17 BasicIcfg [2020-10-16 03:52:17,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 03:52:17,741 INFO L168 Benchmark]: Toolchain (without parser) took 3296.17 ms. Allocated memory was 252.7 MB in the beginning and 360.2 MB in the end (delta: 107.5 MB). Free memory was 206.4 MB in the beginning and 177.8 MB in the end (delta: 28.5 MB). Peak memory consumption was 136.0 MB. Max. memory is 14.2 GB. [2020-10-16 03:52:17,742 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:52:17,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 610.42 ms. Allocated memory was 252.7 MB in the beginning and 318.2 MB in the end (delta: 65.5 MB). Free memory was 206.4 MB in the beginning and 271.6 MB in the end (delta: -65.3 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. [2020-10-16 03:52:17,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.38 ms. Allocated memory is still 318.2 MB. Free memory is still 271.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:52:17,744 INFO L168 Benchmark]: Boogie Preprocessor took 29.57 ms. Allocated memory is still 318.2 MB. Free memory was 271.6 MB in the beginning and 269.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 03:52:17,745 INFO L168 Benchmark]: RCFGBuilder took 737.73 ms. Allocated memory is still 318.2 MB. Free memory was 269.1 MB in the beginning and 224.2 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 14.2 GB. [2020-10-16 03:52:17,746 INFO L168 Benchmark]: TraceAbstraction took 1862.14 ms. Allocated memory was 318.2 MB in the beginning and 360.2 MB in the end (delta: 41.9 MB). Free memory was 224.2 MB in the beginning and 177.8 MB in the end (delta: 46.3 MB). Peak memory consumption was 88.3 MB. Max. memory is 14.2 GB. [2020-10-16 03:52:17,751 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 610.42 ms. Allocated memory was 252.7 MB in the beginning and 318.2 MB in the end (delta: 65.5 MB). Free memory was 206.4 MB in the beginning and 271.6 MB in the end (delta: -65.3 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 51.38 ms. Allocated memory is still 318.2 MB. Free memory is still 271.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.57 ms. Allocated memory is still 318.2 MB. Free memory was 271.6 MB in the beginning and 269.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 737.73 ms. Allocated memory is still 318.2 MB. Free memory was 269.1 MB in the beginning and 224.2 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1862.14 ms. Allocated memory was 318.2 MB in the beginning and 360.2 MB in the end (delta: 41.9 MB). Free memory was 224.2 MB in the beginning and 177.8 MB in the end (delta: 46.3 MB). Peak memory consumption was 88.3 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 250 VarBasedMoverChecksPositive, 38 VarBasedMoverChecksNegative, 17 SemBasedMoverChecksPositive, 21 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 40 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.0s, 44 PlacesBefore, 16 PlacesAfterwards, 42 TransitionsBefore, 13 TransitionsAfterwards, 378 CoEnabledTransitionPairs, 5 FixpointIterations, 10 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 32 TotalNumberOfCompositions, 818 MoverChecksTotal - 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: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 10 SDtfs, 5 SDslu, 0 SDs, 0 SdLazy, 24 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 447 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...