./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:15:06,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:15:06,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:15:06,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:15:06,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:15:06,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:15:06,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:15:06,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:15:06,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:15:06,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:15:06,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:15:06,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:15:06,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:15:06,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:15:06,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:15:06,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:15:06,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:15:06,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:15:06,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:15:06,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:15:07,001 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:15:07,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:15:07,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:15:07,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:15:07,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:15:07,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:15:07,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:15:07,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:15:07,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:15:07,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:15:07,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:15:07,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:15:07,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:15:07,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:15:07,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:15:07,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:15:07,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:15:07,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:15:07,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:15:07,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:15:07,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:15:07,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:15:07,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:15:07,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:15:07,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:15:07,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:15:07,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:15:07,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:15:07,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:15:07,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:15:07,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:15:07,052 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:15:07,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:15:07,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:15:07,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:15:07,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:15:07,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:15:07,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:15:07,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:15:07,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:15:07,054 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:15:07,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:15:07,056 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:15:07,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:15:07,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:15:07,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:15:07,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:15:07,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:15:07,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:15:07,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:15:07,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:15:07,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:15:07,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:15:07,058 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:15:07,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:15:07,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:15:07,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-07-22 21:15:07,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:15:07,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:15:07,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:15:07,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:15:07,315 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:15:07,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-2.i [2022-07-22 21:15:07,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bf006cb/19e52788cbc64b63b4fc7b4e84f97732/FLAG2d19a61d8 [2022-07-22 21:15:07,805 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:15:07,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-2.i [2022-07-22 21:15:07,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bf006cb/19e52788cbc64b63b4fc7b4e84f97732/FLAG2d19a61d8 [2022-07-22 21:15:08,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bf006cb/19e52788cbc64b63b4fc7b4e84f97732 [2022-07-22 21:15:08,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:15:08,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:15:08,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:15:08,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:15:08,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:15:08,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371d2eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08, skipping insertion in model container [2022-07-22 21:15:08,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:15:08,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:15:08,582 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-07-22 21:15:08,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:15:08,623 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:15:08,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-07-22 21:15:08,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:15:08,737 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:15:08,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08 WrapperNode [2022-07-22 21:15:08,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:15:08,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:15:08,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:15:08,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:15:08,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,808 INFO L137 Inliner]: procedures = 277, calls = 46, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2022-07-22 21:15:08,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:15:08,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:15:08,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:15:08,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:15:08,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:15:08,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:15:08,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:15:08,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:15:08,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (1/1) ... [2022-07-22 21:15:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:15:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:15:08,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:15:08,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:15:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-22 21:15:08,937 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-22 21:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-22 21:15:08,937 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-22 21:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:15:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:15:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:15:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:15:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:15:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:15:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:15:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:15:08,939 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:15:09,051 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:15:09,060 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:15:09,247 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:15:09,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:15:09,265 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:15:09,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:15:09 BoogieIcfgContainer [2022-07-22 21:15:09,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:15:09,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:15:09,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:15:09,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:15:09,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:15:08" (1/3) ... [2022-07-22 21:15:09,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2089c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:15:09, skipping insertion in model container [2022-07-22 21:15:09,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:08" (2/3) ... [2022-07-22 21:15:09,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2089c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:15:09, skipping insertion in model container [2022-07-22 21:15:09,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:15:09" (3/3) ... [2022-07-22 21:15:09,311 INFO L111 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-07-22 21:15:09,315 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:15:09,322 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:15:09,324 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:15:09,325 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:15:09,436 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:15:09,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 182 places, 185 transitions, 386 flow [2022-07-22 21:15:09,576 INFO L129 PetriNetUnfolder]: 10/183 cut-off events. [2022-07-22 21:15:09,577 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:15:09,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 10/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 437 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-07-22 21:15:09,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 185 transitions, 386 flow [2022-07-22 21:15:09,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 173 transitions, 355 flow [2022-07-22 21:15:09,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:15:09,606 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1576efe7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32e7d42c [2022-07-22 21:15:09,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:15:09,640 INFO L129 PetriNetUnfolder]: 4/138 cut-off events. [2022-07-22 21:15:09,641 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:15:09,641 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:09,642 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:09,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1631243722, now seen corresponding path program 1 times [2022-07-22 21:15:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:09,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895250171] [2022-07-22 21:15:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:09,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895250171] [2022-07-22 21:15:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895250171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:09,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:09,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:15:09,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000519508] [2022-07-22 21:15:09,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:15:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:15:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:15:10,004 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 185 [2022-07-22 21:15:10,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 173 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:10,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 185 [2022-07-22 21:15:10,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:10,211 INFO L129 PetriNetUnfolder]: 91/896 cut-off events. [2022-07-22 21:15:10,211 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-07-22 21:15:10,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 896 events. 91/896 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5283 event pairs, 15 based on Foata normal form. 61/885 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-07-22 21:15:10,223 INFO L132 encePairwiseOnDemand]: 176/185 looper letters, 19 selfloop transitions, 3 changer transitions 0/173 dead transitions. [2022-07-22 21:15:10,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 405 flow [2022-07-22 21:15:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:15:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:15:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-07-22 21:15:10,247 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9441441441441442 [2022-07-22 21:15:10,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-07-22 21:15:10,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-07-22 21:15:10,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:10,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-07-22 21:15:10,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,269 INFO L186 Difference]: Start difference. First operand has 170 places, 173 transitions, 355 flow. Second operand 3 states and 524 transitions. [2022-07-22 21:15:10,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 405 flow [2022-07-22 21:15:10,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 173 transitions, 397 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:15:10,278 INFO L242 Difference]: Finished difference. Result has 166 places, 166 transitions, 351 flow [2022-07-22 21:15:10,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=166, PETRI_TRANSITIONS=166} [2022-07-22 21:15:10,284 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, -4 predicate places. [2022-07-22 21:15:10,284 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 166 transitions, 351 flow [2022-07-22 21:15:10,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:10,286 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:10,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:15:10,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash -959432383, now seen corresponding path program 1 times [2022-07-22 21:15:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:10,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202406111] [2022-07-22 21:15:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:10,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:10,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202406111] [2022-07-22 21:15:10,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202406111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:10,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:10,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:15:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955375114] [2022-07-22 21:15:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:10,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:15:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:15:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:15:10,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 185 [2022-07-22 21:15:10,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 166 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:10,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 185 [2022-07-22 21:15:10,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:10,466 INFO L129 PetriNetUnfolder]: 21/425 cut-off events. [2022-07-22 21:15:10,466 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:15:10,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 425 events. 21/425 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1379 event pairs, 4 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-07-22 21:15:10,482 INFO L132 encePairwiseOnDemand]: 182/185 looper letters, 9 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-07-22 21:15:10,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 379 flow [2022-07-22 21:15:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:15:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:15:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-07-22 21:15:10,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9405405405405406 [2022-07-22 21:15:10,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-07-22 21:15:10,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-07-22 21:15:10,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:10,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-07-22 21:15:10,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,489 INFO L186 Difference]: Start difference. First operand has 166 places, 166 transitions, 351 flow. Second operand 3 states and 522 transitions. [2022-07-22 21:15:10,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 379 flow [2022-07-22 21:15:10,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 169 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:10,493 INFO L242 Difference]: Finished difference. Result has 168 places, 166 transitions, 356 flow [2022-07-22 21:15:10,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=168, PETRI_TRANSITIONS=166} [2022-07-22 21:15:10,494 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, -2 predicate places. [2022-07-22 21:15:10,494 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 166 transitions, 356 flow [2022-07-22 21:15:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,495 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:10,495 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:10,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:15:10,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1579701380, now seen corresponding path program 1 times [2022-07-22 21:15:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:10,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020789663] [2022-07-22 21:15:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:10,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020789663] [2022-07-22 21:15:10,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020789663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:10,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:10,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:15:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961324426] [2022-07-22 21:15:10,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:10,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:15:10,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:15:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:15:10,557 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 185 [2022-07-22 21:15:10,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 166 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:10,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 185 [2022-07-22 21:15:10,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:10,672 INFO L129 PetriNetUnfolder]: 41/522 cut-off events. [2022-07-22 21:15:10,672 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:15:10,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 522 events. 41/522 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2035 event pairs, 13 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-07-22 21:15:10,676 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 16 selfloop transitions, 4 changer transitions 0/174 dead transitions. [2022-07-22 21:15:10,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 174 transitions, 417 flow [2022-07-22 21:15:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:15:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:15:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 681 transitions. [2022-07-22 21:15:10,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9202702702702703 [2022-07-22 21:15:10,679 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 681 transitions. [2022-07-22 21:15:10,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 681 transitions. [2022-07-22 21:15:10,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:10,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 681 transitions. [2022-07-22 21:15:10,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,685 INFO L186 Difference]: Start difference. First operand has 168 places, 166 transitions, 356 flow. Second operand 4 states and 681 transitions. [2022-07-22 21:15:10,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 174 transitions, 417 flow [2022-07-22 21:15:10,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 174 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:10,690 INFO L242 Difference]: Finished difference. Result has 172 places, 169 transitions, 382 flow [2022-07-22 21:15:10,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=382, PETRI_PLACES=172, PETRI_TRANSITIONS=169} [2022-07-22 21:15:10,692 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-07-22 21:15:10,693 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 169 transitions, 382 flow [2022-07-22 21:15:10,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,693 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:10,694 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:10,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:15:10,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1819207550, now seen corresponding path program 1 times [2022-07-22 21:15:10,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:10,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599224328] [2022-07-22 21:15:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:10,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:10,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:10,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599224328] [2022-07-22 21:15:10,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599224328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:15:10,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432003099] [2022-07-22 21:15:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:10,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:15:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:15:10,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:15:10,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:15:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:15:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:15:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:11,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:15:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:11,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432003099] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:15:11,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:15:11,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:15:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080876166] [2022-07-22 21:15:11,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:15:11,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:15:11,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:15:11,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:15:11,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 185 [2022-07-22 21:15:11,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 169 transitions, 382 flow. Second operand has 10 states, 10 states have (on average 164.5) internal successors, (1645), 10 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:11,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:11,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 185 [2022-07-22 21:15:11,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:11,716 INFO L129 PetriNetUnfolder]: 187/1846 cut-off events. [2022-07-22 21:15:11,716 INFO L130 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-07-22 21:15:11,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 1846 events. 187/1846 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 12169 event pairs, 33 based on Foata normal form. 8/1747 useless extension candidates. Maximal degree in co-relation 1925. Up to 135 conditions per place. [2022-07-22 21:15:11,734 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 48 selfloop transitions, 14 changer transitions 0/215 dead transitions. [2022-07-22 21:15:11,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 215 transitions, 631 flow [2022-07-22 21:15:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:15:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:15:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1684 transitions. [2022-07-22 21:15:11,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9102702702702703 [2022-07-22 21:15:11,741 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1684 transitions. [2022-07-22 21:15:11,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1684 transitions. [2022-07-22 21:15:11,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:11,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1684 transitions. [2022-07-22 21:15:11,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:11,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:11,756 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:11,756 INFO L186 Difference]: Start difference. First operand has 172 places, 169 transitions, 382 flow. Second operand 10 states and 1684 transitions. [2022-07-22 21:15:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 215 transitions, 631 flow [2022-07-22 21:15:11,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 215 transitions, 629 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:11,762 INFO L242 Difference]: Finished difference. Result has 183 places, 182 transitions, 474 flow [2022-07-22 21:15:11,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=183, PETRI_TRANSITIONS=182} [2022-07-22 21:15:11,764 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2022-07-22 21:15:11,764 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 182 transitions, 474 flow [2022-07-22 21:15:11,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.5) internal successors, (1645), 10 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:11,766 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:11,766 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:11,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:15:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:15:11,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1038169264, now seen corresponding path program 1 times [2022-07-22 21:15:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16448808] [2022-07-22 21:15:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:11,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16448808] [2022-07-22 21:15:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16448808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:12,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:12,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:15:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747281260] [2022-07-22 21:15:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:15:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:15:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:15:12,078 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 185 [2022-07-22 21:15:12,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 182 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:12,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 185 [2022-07-22 21:15:12,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:12,210 INFO L129 PetriNetUnfolder]: 53/1081 cut-off events. [2022-07-22 21:15:12,211 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-07-22 21:15:12,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1081 events. 53/1081 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4704 event pairs, 10 based on Foata normal form. 11/1047 useless extension candidates. Maximal degree in co-relation 843. Up to 46 conditions per place. [2022-07-22 21:15:12,216 INFO L132 encePairwiseOnDemand]: 181/185 looper letters, 12 selfloop transitions, 4 changer transitions 0/179 dead transitions. [2022-07-22 21:15:12,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 485 flow [2022-07-22 21:15:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:15:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:15:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-07-22 21:15:12,221 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9135135135135135 [2022-07-22 21:15:12,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-07-22 21:15:12,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-07-22 21:15:12,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:12,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-07-22 21:15:12,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,224 INFO L186 Difference]: Start difference. First operand has 183 places, 182 transitions, 474 flow. Second operand 3 states and 507 transitions. [2022-07-22 21:15:12,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 485 flow [2022-07-22 21:15:12,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 179 transitions, 473 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:12,231 INFO L242 Difference]: Finished difference. Result has 183 places, 177 transitions, 442 flow [2022-07-22 21:15:12,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=183, PETRI_TRANSITIONS=177} [2022-07-22 21:15:12,234 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2022-07-22 21:15:12,234 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 177 transitions, 442 flow [2022-07-22 21:15:12,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:12,235 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:12,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:15:12,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash 769384455, now seen corresponding path program 1 times [2022-07-22 21:15:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:12,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124825789] [2022-07-22 21:15:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:12,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:12,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124825789] [2022-07-22 21:15:12,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124825789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:12,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:12,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:15:12,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474630032] [2022-07-22 21:15:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:15:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:15:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:15:12,351 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 185 [2022-07-22 21:15:12,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 177 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:12,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 185 [2022-07-22 21:15:12,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:12,602 INFO L129 PetriNetUnfolder]: 119/1236 cut-off events. [2022-07-22 21:15:12,603 INFO L130 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-07-22 21:15:12,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 1236 events. 119/1236 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6102 event pairs, 19 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 1239. Up to 178 conditions per place. [2022-07-22 21:15:12,609 INFO L132 encePairwiseOnDemand]: 174/185 looper letters, 49 selfloop transitions, 13 changer transitions 0/205 dead transitions. [2022-07-22 21:15:12,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 205 transitions, 651 flow [2022-07-22 21:15:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:15:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:15:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1425 transitions. [2022-07-22 21:15:12,614 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8558558558558559 [2022-07-22 21:15:12,614 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1425 transitions. [2022-07-22 21:15:12,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1425 transitions. [2022-07-22 21:15:12,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:12,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1425 transitions. [2022-07-22 21:15:12,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.33333333333334) internal successors, (1425), 9 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,622 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,622 INFO L186 Difference]: Start difference. First operand has 183 places, 177 transitions, 442 flow. Second operand 9 states and 1425 transitions. [2022-07-22 21:15:12,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 205 transitions, 651 flow [2022-07-22 21:15:12,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 205 transitions, 647 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:12,627 INFO L242 Difference]: Finished difference. Result has 195 places, 184 transitions, 526 flow [2022-07-22 21:15:12,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=195, PETRI_TRANSITIONS=184} [2022-07-22 21:15:12,630 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 25 predicate places. [2022-07-22 21:15:12,630 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 184 transitions, 526 flow [2022-07-22 21:15:12,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:12,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:12,633 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:12,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:15:12,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1194335221, now seen corresponding path program 1 times [2022-07-22 21:15:12,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:12,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183493102] [2022-07-22 21:15:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:12,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183493102] [2022-07-22 21:15:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183493102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:13,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:13,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-22 21:15:13,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574885155] [2022-07-22 21:15:13,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:13,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 21:15:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 21:15:13,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-07-22 21:15:13,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 185 [2022-07-22 21:15:13,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 184 transitions, 526 flow. Second operand has 28 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:13,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:13,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 185 [2022-07-22 21:15:13,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:16,542 INFO L129 PetriNetUnfolder]: 1048/4073 cut-off events. [2022-07-22 21:15:16,542 INFO L130 PetriNetUnfolder]: For 605/608 co-relation queries the response was YES. [2022-07-22 21:15:16,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 4073 events. 1048/4073 cut-off events. For 605/608 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 29516 event pairs, 351 based on Foata normal form. 5/3948 useless extension candidates. Maximal degree in co-relation 4256. Up to 1516 conditions per place. [2022-07-22 21:15:16,568 INFO L132 encePairwiseOnDemand]: 148/185 looper letters, 281 selfloop transitions, 43 changer transitions 5/418 dead transitions. [2022-07-22 21:15:16,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 418 transitions, 1787 flow [2022-07-22 21:15:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 21:15:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-22 21:15:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3665 transitions. [2022-07-22 21:15:16,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5503003003003003 [2022-07-22 21:15:16,579 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3665 transitions. [2022-07-22 21:15:16,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3665 transitions. [2022-07-22 21:15:16,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:16,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3665 transitions. [2022-07-22 21:15:16,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.80555555555556) internal successors, (3665), 36 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:16,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 185.0) internal successors, (6845), 37 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:16,602 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 185.0) internal successors, (6845), 37 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:16,603 INFO L186 Difference]: Start difference. First operand has 195 places, 184 transitions, 526 flow. Second operand 36 states and 3665 transitions. [2022-07-22 21:15:16,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 418 transitions, 1787 flow [2022-07-22 21:15:16,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 418 transitions, 1776 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:15:16,614 INFO L242 Difference]: Finished difference. Result has 254 places, 220 transitions, 841 flow [2022-07-22 21:15:16,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=841, PETRI_PLACES=254, PETRI_TRANSITIONS=220} [2022-07-22 21:15:16,615 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 84 predicate places. [2022-07-22 21:15:16,615 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 220 transitions, 841 flow [2022-07-22 21:15:16,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:16,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:16,619 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:16,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:15:16,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1145094813, now seen corresponding path program 2 times [2022-07-22 21:15:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:16,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600153507] [2022-07-22 21:15:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:16,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:17,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600153507] [2022-07-22 21:15:17,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600153507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:17,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:17,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-22 21:15:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639353514] [2022-07-22 21:15:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:17,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 21:15:17,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 21:15:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-07-22 21:15:17,442 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 185 [2022-07-22 21:15:17,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 220 transitions, 841 flow. Second operand has 27 states, 27 states have (on average 96.66666666666667) internal successors, (2610), 27 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:17,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:17,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 185 [2022-07-22 21:15:17,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:22,467 INFO L129 PetriNetUnfolder]: 1419/5642 cut-off events. [2022-07-22 21:15:22,468 INFO L130 PetriNetUnfolder]: For 1865/1865 co-relation queries the response was YES. [2022-07-22 21:15:22,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11906 conditions, 5642 events. 1419/5642 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 43147 event pairs, 122 based on Foata normal form. 16/5566 useless extension candidates. Maximal degree in co-relation 10056. Up to 1303 conditions per place. [2022-07-22 21:15:22,526 INFO L132 encePairwiseOnDemand]: 151/185 looper letters, 334 selfloop transitions, 89 changer transitions 7/519 dead transitions. [2022-07-22 21:15:22,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 519 transitions, 2707 flow [2022-07-22 21:15:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 21:15:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-22 21:15:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5562 transitions. [2022-07-22 21:15:22,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5466339066339067 [2022-07-22 21:15:22,537 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5562 transitions. [2022-07-22 21:15:22,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5562 transitions. [2022-07-22 21:15:22,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:22,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5562 transitions. [2022-07-22 21:15:22,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 101.12727272727273) internal successors, (5562), 55 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:22,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 185.0) internal successors, (10360), 56 states have internal predecessors, (10360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:22,568 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 185.0) internal successors, (10360), 56 states have internal predecessors, (10360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:22,569 INFO L186 Difference]: Start difference. First operand has 254 places, 220 transitions, 841 flow. Second operand 55 states and 5562 transitions. [2022-07-22 21:15:22,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 519 transitions, 2707 flow [2022-07-22 21:15:22,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 519 transitions, 2685 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-22 21:15:22,589 INFO L242 Difference]: Finished difference. Result has 339 places, 270 transitions, 1475 flow [2022-07-22 21:15:22,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1475, PETRI_PLACES=339, PETRI_TRANSITIONS=270} [2022-07-22 21:15:22,590 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 169 predicate places. [2022-07-22 21:15:22,591 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 270 transitions, 1475 flow [2022-07-22 21:15:22,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 96.66666666666667) internal successors, (2610), 27 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:22,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:22,592 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:22,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:15:22,593 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -825862227, now seen corresponding path program 1 times [2022-07-22 21:15:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:22,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216063910] [2022-07-22 21:15:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:22,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:15:22,643 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:15:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:15:22,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:15:22,727 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:15:22,728 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-07-22 21:15:22,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-07-22 21:15:22,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-22 21:15:22,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:15:22,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:15:22,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:15:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:15:22,730 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:22,736 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-22 21:15:22,736 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:15:22,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:15:22 BasicIcfg [2022-07-22 21:15:22,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:15:22,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:15:22,906 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:15:22,906 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:15:22,906 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:15:09" (3/4) ... [2022-07-22 21:15:22,908 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 21:15:22,987 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 21:15:22,987 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:15:22,988 INFO L158 Benchmark]: Toolchain (without parser) took 14815.26ms. Allocated memory was 104.9MB in the beginning and 350.2MB in the end (delta: 245.4MB). Free memory was 70.9MB in the beginning and 173.3MB in the end (delta: -102.4MB). Peak memory consumption was 142.9MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,988 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:15:22,989 INFO L158 Benchmark]: CACSL2BoogieTranslator took 564.73ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 70.7MB in the beginning and 85.0MB in the end (delta: -14.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,989 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.02ms. Allocated memory is still 130.0MB. Free memory was 85.0MB in the beginning and 82.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,989 INFO L158 Benchmark]: Boogie Preprocessor took 52.77ms. Allocated memory is still 130.0MB. Free memory was 82.3MB in the beginning and 80.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,989 INFO L158 Benchmark]: RCFGBuilder took 403.87ms. Allocated memory is still 130.0MB. Free memory was 80.1MB in the beginning and 64.5MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,990 INFO L158 Benchmark]: TraceAbstraction took 13635.86ms. Allocated memory was 130.0MB in the beginning and 350.2MB in the end (delta: 220.2MB). Free memory was 64.0MB in the beginning and 210.0MB in the end (delta: -146.0MB). Peak memory consumption was 225.1MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,990 INFO L158 Benchmark]: Witness Printer took 82.04ms. Allocated memory is still 350.2MB. Free memory was 210.0MB in the beginning and 173.3MB in the end (delta: 36.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-07-22 21:15:22,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 564.73ms. Allocated memory was 104.9MB in the beginning and 130.0MB in the end (delta: 25.2MB). Free memory was 70.7MB in the beginning and 85.0MB in the end (delta: -14.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.02ms. Allocated memory is still 130.0MB. Free memory was 85.0MB in the beginning and 82.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.77ms. Allocated memory is still 130.0MB. Free memory was 82.3MB in the beginning and 80.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 403.87ms. Allocated memory is still 130.0MB. Free memory was 80.1MB in the beginning and 64.5MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 13635.86ms. Allocated memory was 130.0MB in the beginning and 350.2MB in the end (delta: 220.2MB). Free memory was 64.0MB in the beginning and 210.0MB in the end (delta: -146.0MB). Peak memory consumption was 225.1MB. Max. memory is 16.1GB. * Witness Printer took 82.04ms. Allocated memory is still 350.2MB. Free memory was 210.0MB in the beginning and 173.3MB in the end (delta: 36.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(5)]; VAL [arr={5:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={5:0}, m={6:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={5:0}, flag=0, m={6:0}, top=0] [L1021] 0 pthread_t id1, id2; VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=0] [L991] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=0] [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=0] [L992] COND TRUE 1 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=0] [L995] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294967300, arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, tmp=4, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={5:0}, cond=1, flag=0, m={6:0}, top=0] [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) VAL [\old(x)=4, arr={5:0}, flag=0, m={6:0}, stack={5:0}, stack={5:0}, top=0, x=4] [L969] CALL, EXPR 1 get_top() [L954] 1 return top; VAL [\result=0, arr={5:0}, flag=0, m={6:0}, top=0] [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=4, arr={5:0}, flag=0, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, top=0, x=4] [L970] CALL 1 inc_top() [L946] 1 top++ VAL [arr={5:0}, flag=0, m={6:0}, top=1] [L970] RET 1 inc_top() [L972] 1 return 0; VAL [\old(x)=4, \result=0, arr={5:0}, flag=0, m={6:0}, stack={5:0}, stack={5:0}, top=1, x=4] [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, push(arr,tmp)=0, tmp=4, top=1] [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, tmp=4, top=1] [L1006] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, m={6:0}, top=1] [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1007] COND TRUE 2 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1010] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={5:0}, flag=1, m={6:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) VAL [arr={5:0}, flag=1, get_top()=1, m={6:0}, stack={5:0}, stack={5:0}, top=1] [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={5:0}, flag=1, m={6:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=0, arr={5:0}, flag=1, m={6:0}, top=0] [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] VAL [arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, stack[get_top()]=4, top=0] [L984] 2 return stack[get_top()]; VAL [\result=4, arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, stack[get_top()]=4, top=0] [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, pop(arr)=4, top=0] [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1007] COND TRUE 2 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1010] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=0, arr={5:0}, flag=1, m={6:0}, top=0] [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 VAL [arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, top=0] [L979] 2 return (-2); VAL [\result=-2, arr={5:0}, flag=1, m={6:0}, stack={5:0}, stack={5:0}, top=0] [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, pop(arr)=-2, top=0] [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={5:0}, flag=1, m={6:0}, top=0] - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 294 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.3s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1341 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1341 mSDsluCounter, 3196 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3564 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5113 IncrementalHoareTripleChecker+Invalid, 5190 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 237 mSDtfsCounter, 5113 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1475occurred in iteration=8, InterpolantAutomatonStates: 123, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1092 NumberOfCodeBlocks, 1092 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1035 ConstructedInterpolants, 0 QuantifiedInterpolants, 6790 SizeOfPredicates, 2 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 12/66 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! [2022-07-22 21:15:23,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE