/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/lazy01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:30:44,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:30:44,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:30:44,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:30:44,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:30:44,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:30:44,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:30:44,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:30:44,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:30:44,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:30:44,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:30:44,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:30:44,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:30:44,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:30:44,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:30:44,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:30:44,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:30:44,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:30:44,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:30:44,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:30:44,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:30:44,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:30:44,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:30:44,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:30:44,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:30:44,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:30:44,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:30:44,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:30:44,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:30:44,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:30:44,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:30:44,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:30:44,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:30:44,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:30:44,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:30:44,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:30:44,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:30:44,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:30:44,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:30:44,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:30:44,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:30:44,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:30:44,950 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:30:44,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:30:44,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:30:44,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:30:44,953 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:30:44,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:30:44,954 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:30:44,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:30:44,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:30:44,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:30:44,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:30:44,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:30:44,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:30:44,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:30:44,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:30:44,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:30:44,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:30:44,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:30:44,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:30:44,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:30:44,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:30:44,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:30:44,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:30:44,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:30:44,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:30:44,958 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:30:44,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:30:44,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:30:44,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:30:44,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:30:45,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:30:45,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:30:45,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:30:45,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:30:45,386 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:30:45,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/lazy01.i [2020-10-09 14:30:45,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a498b12/a740a7b0ebfa454b9451b95800ea69ba/FLAGb47aaef3b [2020-10-09 14:30:46,194 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:30:46,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/lazy01.i [2020-10-09 14:30:46,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a498b12/a740a7b0ebfa454b9451b95800ea69ba/FLAGb47aaef3b [2020-10-09 14:30:46,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a498b12/a740a7b0ebfa454b9451b95800ea69ba [2020-10-09 14:30:46,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:30:46,466 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:30:46,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:30:46,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:30:46,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:30:46,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:30:46" (1/1) ... [2020-10-09 14:30:46,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1629f375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:46, skipping insertion in model container [2020-10-09 14:30:46,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:30:46" (1/1) ... [2020-10-09 14:30:46,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:30:46,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:30:47,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:30:47,265 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:30:47,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:30:47,466 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:30:47,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47 WrapperNode [2020-10-09 14:30:47,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:30:47,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:30:47,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:30:47,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:30:47,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:30:47,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:30:47,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:30:47,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:30:47,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... [2020-10-09 14:30:47,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:30:47,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:30:47,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:30:47,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:30:47,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:30:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 14:30:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-10-09 14:30:47,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-10-09 14:30:47,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-10-09 14:30:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-10-09 14:30:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2020-10-09 14:30:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2020-10-09 14:30:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:30:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-09 14:30:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:30:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:30:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-09 14:30:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:30:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:30:47,659 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:30:48,096 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:30:48,096 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-09 14:30:48,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:30:48 BoogieIcfgContainer [2020-10-09 14:30:48,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:30:48,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:30:48,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:30:48,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:30:48,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:30:46" (1/3) ... [2020-10-09 14:30:48,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db7ea84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:30:48, skipping insertion in model container [2020-10-09 14:30:48,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:30:47" (2/3) ... [2020-10-09 14:30:48,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db7ea84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:30:48, skipping insertion in model container [2020-10-09 14:30:48,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:30:48" (3/3) ... [2020-10-09 14:30:48,107 INFO L111 eAbstractionObserver]: Analyzing ICFG lazy01.i [2020-10-09 14:30:48,118 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:30:48,126 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:30:48,127 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:30:48,156 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,157 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,157 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,157 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,158 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,158 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,158 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,159 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,159 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,159 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,159 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,160 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,160 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,161 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,161 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,161 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,161 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,162 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,162 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,163 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,164 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,164 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,164 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,164 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,169 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,169 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,170 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,170 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,170 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,170 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,179 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,180 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,180 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,180 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,181 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,184 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,184 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,185 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,185 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,185 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:30:48,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-09 14:30:48,237 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:30:48,237 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:30:48,237 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:30:48,237 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:30:48,238 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:30:48,238 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:30:48,238 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:30:48,238 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:30:48,255 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 81 places, 78 transitions, 198 flow [2020-10-09 14:30:48,312 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2020-10-09 14:30:48,312 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-10-09 14:30:48,320 INFO L80 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 86 events. 6/86 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 129 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 52. Up to 6 conditions per place. [2020-10-09 14:30:48,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 78 transitions, 198 flow [2020-10-09 14:30:48,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 60 transitions, 141 flow [2020-10-09 14:30:48,351 INFO L129 PetriNetUnfolder]: 1/49 cut-off events. [2020-10-09 14:30:48,351 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-09 14:30:48,351 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:30:48,353 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:30:48,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:30:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:30:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash -821811881, now seen corresponding path program 1 times [2020-10-09 14:30:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:30:48,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826291485] [2020-10-09 14:30:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:30:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:30:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 14:30:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:48,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826291485] [2020-10-09 14:30:48,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:30:48,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 14:30:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92925270] [2020-10-09 14:30:48,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:30:48,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:30:48,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:30:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:30:48,745 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 78 [2020-10-09 14:30:48,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 141 flow. Second operand 4 states. [2020-10-09 14:30:48,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:30:48,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 78 [2020-10-09 14:30:48,750 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:30:48,808 INFO L129 PetriNetUnfolder]: 8/115 cut-off events. [2020-10-09 14:30:48,809 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-10-09 14:30:48,811 INFO L80 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 115 events. 8/115 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 375 event pairs, 1 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 119. Up to 11 conditions per place. [2020-10-09 14:30:48,814 INFO L132 encePairwiseOnDemand]: 72/78 looper letters, 2 selfloop transitions, 5 changer transitions 3/64 dead transitions. [2020-10-09 14:30:48,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 169 flow [2020-10-09 14:30:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 14:30:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 14:30:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 301 transitions. [2020-10-09 14:30:48,838 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9647435897435898 [2020-10-09 14:30:48,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 301 transitions. [2020-10-09 14:30:48,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 301 transitions. [2020-10-09 14:30:48,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:30:48,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 301 transitions. [2020-10-09 14:30:48,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 14:30:48,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 14:30:48,861 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 14:30:48,864 INFO L185 Difference]: Start difference. First operand has 67 places, 60 transitions, 141 flow. Second operand 4 states and 301 transitions. [2020-10-09 14:30:48,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 169 flow [2020-10-09 14:30:48,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 156 flow, removed 0 selfloop flow, removed 5 redundant places. [2020-10-09 14:30:48,878 INFO L241 Difference]: Finished difference. Result has 67 places, 61 transitions, 154 flow [2020-10-09 14:30:48,882 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2020-10-09 14:30:48,883 INFO L341 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2020-10-09 14:30:48,883 INFO L481 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 154 flow [2020-10-09 14:30:48,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:30:48,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:30:48,884 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:30:49,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:30:49,094 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:30:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:30:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash -518129932, now seen corresponding path program 1 times [2020-10-09 14:30:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:30:49,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035494188] [2020-10-09 14:30:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:30:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:30:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 14:30:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:49,263 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-09 14:30:49,263 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 14:30:49,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 14:30:49,267 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 14:30:49,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-09 14:30:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:49,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035494188] [2020-10-09 14:30:49,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:30:49,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 14:30:49,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663670628] [2020-10-09 14:30:49,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:30:49,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:30:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:30:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:30:49,422 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 78 [2020-10-09 14:30:49,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 154 flow. Second operand 4 states. [2020-10-09 14:30:49,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:30:49,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 78 [2020-10-09 14:30:49,423 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:30:49,469 INFO L129 PetriNetUnfolder]: 2/90 cut-off events. [2020-10-09 14:30:49,470 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-09 14:30:49,471 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 90 events. 2/90 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 226 event pairs, 0 based on Foata normal form. 9/99 useless extension candidates. Maximal degree in co-relation 95. Up to 9 conditions per place. [2020-10-09 14:30:49,472 INFO L132 encePairwiseOnDemand]: 72/78 looper letters, 2 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2020-10-09 14:30:49,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 170 flow [2020-10-09 14:30:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 14:30:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 14:30:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2020-10-09 14:30:49,475 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9316239316239316 [2020-10-09 14:30:49,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2020-10-09 14:30:49,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2020-10-09 14:30:49,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:30:49,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2020-10-09 14:30:49,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 14:30:49,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 14:30:49,480 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 14:30:49,480 INFO L185 Difference]: Start difference. First operand has 67 places, 61 transitions, 154 flow. Second operand 3 states and 218 transitions. [2020-10-09 14:30:49,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 170 flow [2020-10-09 14:30:49,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:30:49,487 INFO L241 Difference]: Finished difference. Result has 69 places, 61 transitions, 166 flow [2020-10-09 14:30:49,487 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2020-10-09 14:30:49,488 INFO L341 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2020-10-09 14:30:49,489 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 166 flow [2020-10-09 14:30:49,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:30:49,489 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:30:49,489 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:30:49,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:30:49,705 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:30:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:30:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash -61347595, now seen corresponding path program 1 times [2020-10-09 14:30:49,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:30:49,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242838826] [2020-10-09 14:30:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:30:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:30:49,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 14:30:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:30:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:49,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:30:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:30:49,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242838826] [2020-10-09 14:30:49,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:30:49,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2020-10-09 14:30:49,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620578674] [2020-10-09 14:30:49,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 14:30:49,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:30:49,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 14:30:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-09 14:30:49,979 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 78 [2020-10-09 14:30:49,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 166 flow. Second operand 7 states. [2020-10-09 14:30:49,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:30:49,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 78 [2020-10-09 14:30:49,981 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:30:50,063 INFO L129 PetriNetUnfolder]: 2/88 cut-off events. [2020-10-09 14:30:50,064 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2020-10-09 14:30:50,065 INFO L80 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 88 events. 2/88 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 218 event pairs, 0 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 102. Up to 9 conditions per place. [2020-10-09 14:30:50,065 INFO L132 encePairwiseOnDemand]: 71/78 looper letters, 4 selfloop transitions, 8 changer transitions 1/64 dead transitions. [2020-10-09 14:30:50,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 201 flow [2020-10-09 14:30:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 14:30:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 14:30:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 497 transitions. [2020-10-09 14:30:50,069 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9102564102564102 [2020-10-09 14:30:50,069 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 497 transitions. [2020-10-09 14:30:50,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 497 transitions. [2020-10-09 14:30:50,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:30:50,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 497 transitions. [2020-10-09 14:30:50,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 14:30:50,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 14:30:50,074 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 14:30:50,074 INFO L185 Difference]: Start difference. First operand has 69 places, 61 transitions, 166 flow. Second operand 7 states and 497 transitions. [2020-10-09 14:30:50,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 201 flow [2020-10-09 14:30:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 14:30:50,077 INFO L241 Difference]: Finished difference. Result has 77 places, 63 transitions, 193 flow [2020-10-09 14:30:50,078 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2020-10-09 14:30:50,078 INFO L341 CegarLoopForPetriNet]: 67 programPoint places, 10 predicate places. [2020-10-09 14:30:50,078 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 193 flow [2020-10-09 14:30:50,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 14:30:50,078 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:30:50,079 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:30:50,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:30:50,290 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:30:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:30:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1575808979, now seen corresponding path program 1 times [2020-10-09 14:30:50,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:30:50,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341559941] [2020-10-09 14:30:50,292 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 14:30:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 14:30:50,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:30:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 14:30:50,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:30:50,463 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 14:30:50,464 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 14:30:50,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 14:30:50,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:30:50 BasicIcfg [2020-10-09 14:30:50,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:30:50,758 INFO L168 Benchmark]: Toolchain (without parser) took 4292.11 ms. Allocated memory was 244.3 MB in the beginning and 352.8 MB in the end (delta: 108.5 MB). Free memory was 199.7 MB in the beginning and 216.9 MB in the end (delta: -17.2 MB). Peak memory consumption was 91.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:50,759 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 244.3 MB. Free memory is still 220.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:30:50,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1002.38 ms. Allocated memory was 244.3 MB in the beginning and 292.6 MB in the end (delta: 48.2 MB). Free memory was 199.7 MB in the beginning and 247.9 MB in the end (delta: -48.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:50,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.07 ms. Allocated memory is still 292.6 MB. Free memory was 247.9 MB in the beginning and 245.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:50,762 INFO L168 Benchmark]: Boogie Preprocessor took 37.80 ms. Allocated memory is still 292.6 MB. Free memory was 245.3 MB in the beginning and 242.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:50,763 INFO L168 Benchmark]: RCFGBuilder took 529.16 ms. Allocated memory is still 292.6 MB. Free memory was 242.8 MB in the beginning and 221.0 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:50,764 INFO L168 Benchmark]: TraceAbstraction took 2656.13 ms. Allocated memory was 292.6 MB in the beginning and 352.8 MB in the end (delta: 60.3 MB). Free memory was 221.0 MB in the beginning and 216.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 64.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:30:50,769 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 244.3 MB. Free memory is still 220.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1002.38 ms. Allocated memory was 244.3 MB in the beginning and 292.6 MB in the end (delta: 48.2 MB). Free memory was 199.7 MB in the beginning and 247.9 MB in the end (delta: -48.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 59.07 ms. Allocated memory is still 292.6 MB. Free memory was 247.9 MB in the beginning and 245.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 37.80 ms. Allocated memory is still 292.6 MB. Free memory was 245.3 MB in the beginning and 242.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 529.16 ms. Allocated memory is still 292.6 MB. Free memory was 242.8 MB in the beginning and 221.0 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2656.13 ms. Allocated memory was 292.6 MB in the beginning and 352.8 MB in the end (delta: 60.3 MB). Free memory was 221.0 MB in the beginning and 216.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 64.4 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L683] 0 pthread_mutex_t mutex; VAL [mutex={3:0}] [L684] 0 int data = 0; VAL [data=0, mutex={3:0}] [L712] 0 pthread_t t1, t2, t3; VAL [data=0, mutex={3:0}] [L713] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, data=0, mutex={3:0}] [L714] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L715] FCALL, FORK 0 pthread_create(&t3, 0, thread3, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, data=0, mutex={3:0}] [L688] 1 data++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=1, mutex={3:0}] [L695] 2 data+=2 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L702] COND TRUE 3 data >= 3 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] [L703] 3 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, data=3, mutex={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 24 SDslu, 8 SDs, 0 SdLazy, 75 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=193occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 16068 SizeOfPredicates, 6 NumberOfNonLiveVariables, 300 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 incorrect! Received shutdown request...