./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.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/goblint-regression/28-race_reach_71-funloop_racing.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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:34:15,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:34:15,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:34:15,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:34:15,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:34:15,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:34:15,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:34:15,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:34:15,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:34:15,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:34:15,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:34:15,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:34:15,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:34:15,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:34:15,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:34:15,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:34:15,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:34:15,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:34:15,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:34:15,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:34:15,905 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:34:15,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:34:15,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:34:15,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:34:15,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:34:15,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:34:15,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:34:15,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:34:15,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:34:15,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:34:15,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:34:15,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:34:15,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:34:15,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:34:15,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:34:15,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:34:15,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:34:15,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:34:15,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:34:15,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:34:15,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:34:15,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:34:15,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:34:15,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:34:15,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:34:15,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:34:15,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:34:15,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:34:15,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:34:15,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:34:15,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:34:15,946 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:34:15,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:34:15,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:34:15,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:34:15,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:34:15,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:34:15,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:34:15,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:34:15,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:34:15,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:34:15,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:15,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:34:15,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:34:15,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:34:15,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:34:15,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:34:15,951 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:34:15,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:34:15,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:34:15,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2022-07-22 21:34:16,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:34:16,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:34:16,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:34:16,168 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:34:16,169 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:34:16,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-07-22 21:34:16,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fceef5c0c/acecdfbaaf5140d9a25a0018046c17af/FLAG164dcde11 [2022-07-22 21:34:16,694 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:34:16,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2022-07-22 21:34:16,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fceef5c0c/acecdfbaaf5140d9a25a0018046c17af/FLAG164dcde11 [2022-07-22 21:34:16,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fceef5c0c/acecdfbaaf5140d9a25a0018046c17af [2022-07-22 21:34:16,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:34:16,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:34:16,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:16,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:34:16,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:34:16,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:16" (1/1) ... [2022-07-22 21:34:16,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c2f84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:16, skipping insertion in model container [2022-07-22 21:34:16,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:16" (1/1) ... [2022-07-22 21:34:16,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:34:16,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:34:17,036 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/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-07-22 21:34:17,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:17,059 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:34:17,079 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/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2022-07-22 21:34:17,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:17,118 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:34:17,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17 WrapperNode [2022-07-22 21:34:17,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:17,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:17,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:34:17,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:34:17,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,154 INFO L137 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 244 [2022-07-22 21:34:17,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:17,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:34:17,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:34:17,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:34:17,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:34:17,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:34:17,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:34:17,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:34:17,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (1/1) ... [2022-07-22 21:34:17,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:17,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:17,211 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 21:34:17,224 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 21:34:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:34:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:34:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:34:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:34:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:34:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:34:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:34:17,240 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:34:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:34:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:34:17,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:34:17,241 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 21:34:17,319 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:34:17,320 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:34:17,580 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:34:17,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:34:17,592 INFO L299 CfgBuilder]: Removed 35 assume(true) statements. [2022-07-22 21:34:17,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:17 BoogieIcfgContainer [2022-07-22 21:34:17,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:34:17,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:34:17,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:34:17,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:34:17,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:34:16" (1/3) ... [2022-07-22 21:34:17,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@869ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:17, skipping insertion in model container [2022-07-22 21:34:17,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:17" (2/3) ... [2022-07-22 21:34:17,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@869ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:17, skipping insertion in model container [2022-07-22 21:34:17,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:17" (3/3) ... [2022-07-22 21:34:17,602 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2022-07-22 21:34:17,607 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:34:17,613 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:34:17,613 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-22 21:34:17,614 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:34:17,682 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:34:17,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 252 transitions, 512 flow [2022-07-22 21:34:17,827 INFO L129 PetriNetUnfolder]: 73/388 cut-off events. [2022-07-22 21:34:17,827 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:17,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 388 events. 73/388 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1729 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-07-22 21:34:17,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 252 transitions, 512 flow [2022-07-22 21:34:17,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 247 transitions, 499 flow [2022-07-22 21:34:17,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:17,865 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@2a2ad46d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42a0829 [2022-07-22 21:34:17,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:34:17,915 INFO L129 PetriNetUnfolder]: 21/159 cut-off events. [2022-07-22 21:34:17,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:17,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:17,917 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] [2022-07-22 21:34:17,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1626268510, now seen corresponding path program 1 times [2022-07-22 21:34:17,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:17,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658571601] [2022-07-22 21:34:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:18,110 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 21:34:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658571601] [2022-07-22 21:34:18,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658571601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:18,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:18,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503545601] [2022-07-22 21:34:18,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:18,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:18,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 252 [2022-07-22 21:34:18,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 499 flow. Second operand has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 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 21:34:18,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:18,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 252 [2022-07-22 21:34:18,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:18,208 INFO L129 PetriNetUnfolder]: 9/315 cut-off events. [2022-07-22 21:34:18,208 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:18,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 315 events. 9/315 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1381 event pairs, 0 based on Foata normal form. 63/360 useless extension candidates. Maximal degree in co-relation 174. Up to 4 conditions per place. [2022-07-22 21:34:18,213 INFO L132 encePairwiseOnDemand]: 214/252 looper letters, 1 selfloop transitions, 0 changer transitions 0/206 dead transitions. [2022-07-22 21:34:18,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 419 flow [2022-07-22 21:34:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-07-22 21:34:18,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9067460317460317 [2022-07-22 21:34:18,234 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-07-22 21:34:18,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-07-22 21:34:18,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:18,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-07-22 21:34:18,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 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 21:34:18,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 21:34:18,249 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 21:34:18,251 INFO L186 Difference]: Start difference. First operand has 206 places, 247 transitions, 499 flow. Second operand 2 states and 457 transitions. [2022-07-22 21:34:18,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 419 flow [2022-07-22 21:34:18,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:18,258 INFO L242 Difference]: Finished difference. Result has 204 places, 206 transitions, 417 flow [2022-07-22 21:34:18,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=417, PETRI_PLACES=204, PETRI_TRANSITIONS=206} [2022-07-22 21:34:18,265 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, -2 predicate places. [2022-07-22 21:34:18,266 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 206 transitions, 417 flow [2022-07-22 21:34:18,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 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 21:34:18,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:18,267 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:34:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:34:18,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 350857692, now seen corresponding path program 1 times [2022-07-22 21:34:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504952144] [2022-07-22 21:34:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:18,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:18,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504952144] [2022-07-22 21:34:18,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504952144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:18,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:18,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162497019] [2022-07-22 21:34:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:18,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 252 [2022-07-22 21:34:18,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 206 transitions, 417 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 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 21:34:18,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:18,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 252 [2022-07-22 21:34:18,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:18,409 INFO L129 PetriNetUnfolder]: 9/319 cut-off events. [2022-07-22 21:34:18,410 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:18,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 319 events. 9/319 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1379 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 334. Up to 9 conditions per place. [2022-07-22 21:34:18,416 INFO L132 encePairwiseOnDemand]: 249/252 looper letters, 10 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-07-22 21:34:18,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 210 transitions, 449 flow [2022-07-22 21:34:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-07-22 21:34:18,418 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8187830687830688 [2022-07-22 21:34:18,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-07-22 21:34:18,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-07-22 21:34:18,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:18,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-07-22 21:34:18,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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 21:34:18,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 21:34:18,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 21:34:18,423 INFO L186 Difference]: Start difference. First operand has 204 places, 206 transitions, 417 flow. Second operand 3 states and 619 transitions. [2022-07-22 21:34:18,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 210 transitions, 449 flow [2022-07-22 21:34:18,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 210 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:18,432 INFO L242 Difference]: Finished difference. Result has 207 places, 207 transitions, 429 flow [2022-07-22 21:34:18,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=207, PETRI_TRANSITIONS=207} [2022-07-22 21:34:18,433 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 1 predicate places. [2022-07-22 21:34:18,433 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 207 transitions, 429 flow [2022-07-22 21:34:18,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 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 21:34:18,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:18,434 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:34:18,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:34:18,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 471585416, now seen corresponding path program 1 times [2022-07-22 21:34:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192679436] [2022-07-22 21:34:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:18,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192679436] [2022-07-22 21:34:18,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192679436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803987834] [2022-07-22 21:34:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:18,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:18,498 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 21:34:18,499 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 21:34:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:18,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:18,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803987834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:18,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:18,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:18,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792400993] [2022-07-22 21:34:18,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:18,648 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-07-22 21:34:18,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 207 transitions, 429 flow. Second operand has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 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 21:34:18,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:18,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-07-22 21:34:18,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:18,725 INFO L129 PetriNetUnfolder]: 9/326 cut-off events. [2022-07-22 21:34:18,726 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:34:18,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 326 events. 9/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1374 event pairs, 0 based on Foata normal form. 2/311 useless extension candidates. Maximal degree in co-relation 355. Up to 6 conditions per place. [2022-07-22 21:34:18,728 INFO L132 encePairwiseOnDemand]: 246/252 looper letters, 11 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2022-07-22 21:34:18,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 217 transitions, 491 flow [2022-07-22 21:34:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1831 transitions. [2022-07-22 21:34:18,731 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8073192239858906 [2022-07-22 21:34:18,731 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1831 transitions. [2022-07-22 21:34:18,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1831 transitions. [2022-07-22 21:34:18,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:18,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1831 transitions. [2022-07-22 21:34:18,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 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 21:34:18,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 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 21:34:18,739 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 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 21:34:18,740 INFO L186 Difference]: Start difference. First operand has 207 places, 207 transitions, 429 flow. Second operand 9 states and 1831 transitions. [2022-07-22 21:34:18,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 217 transitions, 491 flow [2022-07-22 21:34:18,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 217 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:18,744 INFO L242 Difference]: Finished difference. Result has 217 places, 213 transitions, 477 flow [2022-07-22 21:34:18,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=477, PETRI_PLACES=217, PETRI_TRANSITIONS=213} [2022-07-22 21:34:18,745 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 11 predicate places. [2022-07-22 21:34:18,745 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 213 transitions, 477 flow [2022-07-22 21:34:18,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.1) internal successors, (2031), 10 states have internal predecessors, (2031), 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 21:34:18,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:18,747 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-22 21:34:18,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:34:18,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:18,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:18,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:18,958 INFO L85 PathProgramCache]: Analyzing trace with hash 567047944, now seen corresponding path program 2 times [2022-07-22 21:34:18,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:18,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993633518] [2022-07-22 21:34:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:18,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:19,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993633518] [2022-07-22 21:34:19,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993633518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907568238] [2022-07-22 21:34:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:19,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:19,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:19,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:34:19,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:19,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:19,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907568238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:19,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:19,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090868681] [2022-07-22 21:34:19,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:19,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:19,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:19,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-07-22 21:34:19,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 213 transitions, 477 flow. Second operand has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 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 21:34:19,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:19,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-07-22 21:34:19,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:19,474 INFO L129 PetriNetUnfolder]: 9/346 cut-off events. [2022-07-22 21:34:19,474 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-22 21:34:19,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 346 events. 9/346 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1374 event pairs, 0 based on Foata normal form. 4/333 useless extension candidates. Maximal degree in co-relation 442. Up to 11 conditions per place. [2022-07-22 21:34:19,476 INFO L132 encePairwiseOnDemand]: 246/252 looper letters, 19 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2022-07-22 21:34:19,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 665 flow [2022-07-22 21:34:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4265 transitions. [2022-07-22 21:34:19,483 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8059334845049131 [2022-07-22 21:34:19,483 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4265 transitions. [2022-07-22 21:34:19,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4265 transitions. [2022-07-22 21:34:19,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:19,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4265 transitions. [2022-07-22 21:34:19,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 203.0952380952381) internal successors, (4265), 21 states have internal predecessors, (4265), 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 21:34:19,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 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 21:34:19,497 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 252.0) internal successors, (5544), 22 states have internal predecessors, (5544), 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 21:34:19,497 INFO L186 Difference]: Start difference. First operand has 217 places, 213 transitions, 477 flow. Second operand 21 states and 4265 transitions. [2022-07-22 21:34:19,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 665 flow [2022-07-22 21:34:19,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 651 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:19,531 INFO L242 Difference]: Finished difference. Result has 241 places, 226 transitions, 601 flow [2022-07-22 21:34:19,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=601, PETRI_PLACES=241, PETRI_TRANSITIONS=226} [2022-07-22 21:34:19,532 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 35 predicate places. [2022-07-22 21:34:19,532 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 226 transitions, 601 flow [2022-07-22 21:34:19,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 203.27777777777777) internal successors, (3659), 18 states have internal predecessors, (3659), 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 21:34:19,534 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:19,534 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-22 21:34:19,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:34:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 21:34:19,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1472913416, now seen corresponding path program 3 times [2022-07-22 21:34:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:19,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373390283] [2022-07-22 21:34:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373390283] [2022-07-22 21:34:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373390283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610285534] [2022-07-22 21:34:19,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:34:19,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:19,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:19,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:19,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:34:20,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:34:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:20,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610285534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:20,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:20,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:20,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292539573] [2022-07-22 21:34:20,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:20,197 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 252 [2022-07-22 21:34:20,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 226 transitions, 601 flow. Second operand has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 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 21:34:20,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:20,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 252 [2022-07-22 21:34:20,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:20,457 INFO L129 PetriNetUnfolder]: 9/361 cut-off events. [2022-07-22 21:34:20,457 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:34:20,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 361 events. 9/361 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1374 event pairs, 0 based on Foata normal form. 3/347 useless extension candidates. Maximal degree in co-relation 538. Up to 17 conditions per place. [2022-07-22 21:34:20,460 INFO L132 encePairwiseOnDemand]: 246/252 looper letters, 25 selfloop transitions, 30 changer transitions 0/252 dead transitions. [2022-07-22 21:34:20,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 252 transitions, 857 flow [2022-07-22 21:34:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6088 transitions. [2022-07-22 21:34:20,469 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8052910052910053 [2022-07-22 21:34:20,469 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6088 transitions. [2022-07-22 21:34:20,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6088 transitions. [2022-07-22 21:34:20,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:20,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6088 transitions. [2022-07-22 21:34:20,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 202.93333333333334) internal successors, (6088), 30 states have internal predecessors, (6088), 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 21:34:20,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 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 21:34:20,492 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 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 21:34:20,492 INFO L186 Difference]: Start difference. First operand has 241 places, 226 transitions, 601 flow. Second operand 30 states and 6088 transitions. [2022-07-22 21:34:20,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 252 transitions, 857 flow [2022-07-22 21:34:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 252 transitions, 827 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:20,498 INFO L242 Difference]: Finished difference. Result has 268 places, 236 transitions, 729 flow [2022-07-22 21:34:20,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=729, PETRI_PLACES=268, PETRI_TRANSITIONS=236} [2022-07-22 21:34:20,499 INFO L279 CegarLoopForPetriNet]: 206 programPoint places, 62 predicate places. [2022-07-22 21:34:20,500 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 236 transitions, 729 flow [2022-07-22 21:34:20,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 203.43478260869566) internal successors, (4679), 23 states have internal predecessors, (4679), 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 21:34:20,501 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:20,502 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-22 21:34:20,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 21:34:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:20,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:34:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash 715826012, now seen corresponding path program 4 times [2022-07-22 21:34:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178255539] [2022-07-22 21:34:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:20,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:20,744 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:20,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:20,806 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:20,807 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:34:20,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:34:20,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:34:20,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:34:20,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:34:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:34:20,809 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-07-22 21:34:20,811 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:20,811 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:34:20,827 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:34:20,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 270 places, 325 transitions, 668 flow [2022-07-22 21:34:20,877 INFO L129 PetriNetUnfolder]: 118/622 cut-off events. [2022-07-22 21:34:20,877 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:34:20,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 622 events. 118/622 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3184 event pairs, 0 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 390. Up to 12 conditions per place. [2022-07-22 21:34:20,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 325 transitions, 668 flow [2022-07-22 21:34:20,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 325 transitions, 668 flow [2022-07-22 21:34:20,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:20,890 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@2a2ad46d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42a0829 [2022-07-22 21:34:20,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:34:20,897 INFO L129 PetriNetUnfolder]: 19/157 cut-off events. [2022-07-22 21:34:20,897 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:20,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:20,897 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] [2022-07-22 21:34:20,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 842848576, now seen corresponding path program 1 times [2022-07-22 21:34:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:20,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891486917] [2022-07-22 21:34:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:20,914 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 21:34:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891486917] [2022-07-22 21:34:20,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891486917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:20,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:20,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696345819] [2022-07-22 21:34:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:20,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:20,918 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-07-22 21:34:20,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 325 transitions, 668 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 21:34:20,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:20,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-07-22 21:34:20,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:20,977 INFO L129 PetriNetUnfolder]: 17/517 cut-off events. [2022-07-22 21:34:20,978 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:34:20,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 517 events. 17/517 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2687 event pairs, 0 based on Foata normal form. 125/613 useless extension candidates. Maximal degree in co-relation 339. Up to 14 conditions per place. [2022-07-22 21:34:20,983 INFO L132 encePairwiseOnDemand]: 272/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-07-22 21:34:20,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 275 transitions, 598 flow [2022-07-22 21:34:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 847 transitions. [2022-07-22 21:34:20,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8687179487179487 [2022-07-22 21:34:20,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 847 transitions. [2022-07-22 21:34:20,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 847 transitions. [2022-07-22 21:34:20,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:20,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 847 transitions. [2022-07-22 21:34:20,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 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 21:34:20,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 21:34:20,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 21:34:20,989 INFO L186 Difference]: Start difference. First operand has 270 places, 325 transitions, 668 flow. Second operand 3 states and 847 transitions. [2022-07-22 21:34:20,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 275 transitions, 598 flow [2022-07-22 21:34:20,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 275 transitions, 598 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:20,993 INFO L242 Difference]: Finished difference. Result has 269 places, 272 transitions, 572 flow [2022-07-22 21:34:20,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=572, PETRI_PLACES=269, PETRI_TRANSITIONS=272} [2022-07-22 21:34:20,994 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, -1 predicate places. [2022-07-22 21:34:20,994 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 272 transitions, 572 flow [2022-07-22 21:34:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 21:34:20,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:20,995 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] [2022-07-22 21:34:20,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:34:20,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1567446095, now seen corresponding path program 1 times [2022-07-22 21:34:20,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873673828] [2022-07-22 21:34:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:20,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:21,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873673828] [2022-07-22 21:34:21,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873673828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870439632] [2022-07-22 21:34:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:21,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:21,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:34:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:21,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:21,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870439632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:21,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:21,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517811342] [2022-07-22 21:34:21,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:21,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 325 [2022-07-22 21:34:21,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 272 transitions, 572 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 21:34:21,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:21,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 325 [2022-07-22 21:34:21,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:21,181 INFO L129 PetriNetUnfolder]: 13/421 cut-off events. [2022-07-22 21:34:21,181 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-22 21:34:21,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 421 events. 13/421 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1985 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 426. Up to 16 conditions per place. [2022-07-22 21:34:21,186 INFO L132 encePairwiseOnDemand]: 322/325 looper letters, 13 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-07-22 21:34:21,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 276 transitions, 610 flow [2022-07-22 21:34:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-07-22 21:34:21,188 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164102564102564 [2022-07-22 21:34:21,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-07-22 21:34:21,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-07-22 21:34:21,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:21,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-07-22 21:34:21,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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 21:34:21,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 21:34:21,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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 21:34:21,191 INFO L186 Difference]: Start difference. First operand has 269 places, 272 transitions, 572 flow. Second operand 3 states and 796 transitions. [2022-07-22 21:34:21,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 276 transitions, 610 flow [2022-07-22 21:34:21,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 276 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:21,195 INFO L242 Difference]: Finished difference. Result has 271 places, 273 transitions, 582 flow [2022-07-22 21:34:21,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=271, PETRI_TRANSITIONS=273} [2022-07-22 21:34:21,196 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 1 predicate places. [2022-07-22 21:34:21,196 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 273 transitions, 582 flow [2022-07-22 21:34:21,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 21:34:21,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:21,197 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 21:34:21,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:21,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash -909156870, now seen corresponding path program 1 times [2022-07-22 21:34:21,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:21,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405336886] [2022-07-22 21:34:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405336886] [2022-07-22 21:34:21,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405336886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878638410] [2022-07-22 21:34:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:21,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:21,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:34:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:21,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:21,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878638410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:21,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:21,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:21,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361329944] [2022-07-22 21:34:21,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:21,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:21,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:21,579 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-07-22 21:34:21,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 273 transitions, 582 flow. Second operand has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 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 21:34:21,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:21,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-07-22 21:34:21,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:21,670 INFO L129 PetriNetUnfolder]: 13/428 cut-off events. [2022-07-22 21:34:21,670 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-22 21:34:21,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 428 events. 13/428 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 2/410 useless extension candidates. Maximal degree in co-relation 411. Up to 11 conditions per place. [2022-07-22 21:34:21,676 INFO L132 encePairwiseOnDemand]: 319/325 looper letters, 14 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-07-22 21:34:21,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 283 transitions, 650 flow [2022-07-22 21:34:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2356 transitions. [2022-07-22 21:34:21,680 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8054700854700855 [2022-07-22 21:34:21,680 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2356 transitions. [2022-07-22 21:34:21,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2356 transitions. [2022-07-22 21:34:21,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:21,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2356 transitions. [2022-07-22 21:34:21,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 261.77777777777777) internal successors, (2356), 9 states have internal predecessors, (2356), 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 21:34:21,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 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 21:34:21,693 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 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 21:34:21,693 INFO L186 Difference]: Start difference. First operand has 271 places, 273 transitions, 582 flow. Second operand 9 states and 2356 transitions. [2022-07-22 21:34:21,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 283 transitions, 650 flow [2022-07-22 21:34:21,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 283 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:21,700 INFO L242 Difference]: Finished difference. Result has 281 places, 279 transitions, 630 flow [2022-07-22 21:34:21,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=281, PETRI_TRANSITIONS=279} [2022-07-22 21:34:21,703 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 11 predicate places. [2022-07-22 21:34:21,703 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 279 transitions, 630 flow [2022-07-22 21:34:21,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 261.2) internal successors, (2612), 10 states have internal predecessors, (2612), 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 21:34:21,704 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:21,704 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 21:34:21,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:21,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 989555546, now seen corresponding path program 2 times [2022-07-22 21:34:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:21,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801535621] [2022-07-22 21:34:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:21,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801535621] [2022-07-22 21:34:21,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801535621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:21,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996533264] [2022-07-22 21:34:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:21,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:21,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:34:22,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:22,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:22,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996533264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:22,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:22,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:22,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294878342] [2022-07-22 21:34:22,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:22,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:22,195 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-07-22 21:34:22,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 279 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 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 21:34:22,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:22,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-07-22 21:34:22,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:22,391 INFO L129 PetriNetUnfolder]: 13/448 cut-off events. [2022-07-22 21:34:22,392 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-07-22 21:34:22,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 448 events. 13/448 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 415. Up to 11 conditions per place. [2022-07-22 21:34:22,398 INFO L132 encePairwiseOnDemand]: 319/325 looper letters, 22 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-07-22 21:34:22,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 303 transitions, 824 flow [2022-07-22 21:34:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5486 transitions. [2022-07-22 21:34:22,407 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038095238095239 [2022-07-22 21:34:22,407 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5486 transitions. [2022-07-22 21:34:22,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5486 transitions. [2022-07-22 21:34:22,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:22,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5486 transitions. [2022-07-22 21:34:22,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 261.23809523809524) internal successors, (5486), 21 states have internal predecessors, (5486), 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 21:34:22,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 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 21:34:22,426 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 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 21:34:22,426 INFO L186 Difference]: Start difference. First operand has 281 places, 279 transitions, 630 flow. Second operand 21 states and 5486 transitions. [2022-07-22 21:34:22,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 303 transitions, 824 flow [2022-07-22 21:34:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 303 transitions, 810 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:22,431 INFO L242 Difference]: Finished difference. Result has 305 places, 292 transitions, 754 flow [2022-07-22 21:34:22,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=754, PETRI_PLACES=305, PETRI_TRANSITIONS=292} [2022-07-22 21:34:22,432 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 35 predicate places. [2022-07-22 21:34:22,432 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 292 transitions, 754 flow [2022-07-22 21:34:22,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 261.3333333333333) internal successors, (4704), 18 states have internal predecessors, (4704), 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 21:34:22,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:22,434 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 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] [2022-07-22 21:34:22,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:22,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:22,650 INFO L85 PathProgramCache]: Analyzing trace with hash 956161562, now seen corresponding path program 3 times [2022-07-22 21:34:22,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:22,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121680388] [2022-07-22 21:34:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121680388] [2022-07-22 21:34:22,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121680388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505095519] [2022-07-22 21:34:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:34:22,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:22,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:22,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:34:22,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:34:22,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:22,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:23,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505095519] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:23,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:23,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:23,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205222288] [2022-07-22 21:34:23,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:23,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:23,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:23,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:23,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:23,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 325 [2022-07-22 21:34:23,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 292 transitions, 754 flow. Second operand has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 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 21:34:23,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:23,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 325 [2022-07-22 21:34:23,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:23,331 INFO L129 PetriNetUnfolder]: 13/463 cut-off events. [2022-07-22 21:34:23,331 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-22 21:34:23,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 463 events. 13/463 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1980 event pairs, 0 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 450. Up to 17 conditions per place. [2022-07-22 21:34:23,336 INFO L132 encePairwiseOnDemand]: 319/325 looper letters, 28 selfloop transitions, 30 changer transitions 0/318 dead transitions. [2022-07-22 21:34:23,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 318 transitions, 1016 flow [2022-07-22 21:34:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7831 transitions. [2022-07-22 21:34:23,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8031794871794872 [2022-07-22 21:34:23,342 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7831 transitions. [2022-07-22 21:34:23,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7831 transitions. [2022-07-22 21:34:23,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:23,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7831 transitions. [2022-07-22 21:34:23,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 261.03333333333336) internal successors, (7831), 30 states have internal predecessors, (7831), 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 21:34:23,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 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 21:34:23,360 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 325.0) internal successors, (10075), 31 states have internal predecessors, (10075), 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 21:34:23,361 INFO L186 Difference]: Start difference. First operand has 305 places, 292 transitions, 754 flow. Second operand 30 states and 7831 transitions. [2022-07-22 21:34:23,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 318 transitions, 1016 flow [2022-07-22 21:34:23,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 318 transitions, 986 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:23,365 INFO L242 Difference]: Finished difference. Result has 332 places, 302 transitions, 882 flow [2022-07-22 21:34:23,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=882, PETRI_PLACES=332, PETRI_TRANSITIONS=302} [2022-07-22 21:34:23,366 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 62 predicate places. [2022-07-22 21:34:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 302 transitions, 882 flow [2022-07-22 21:34:23,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 261.4782608695652) internal successors, (6014), 23 states have internal predecessors, (6014), 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 21:34:23,368 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:23,368 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 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] [2022-07-22 21:34:23,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:23,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:23,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:34:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash 731956713, now seen corresponding path program 4 times [2022-07-22 21:34:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181001693] [2022-07-22 21:34:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:23,615 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:23,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:23,666 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:23,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:34:23,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:34:23,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:34:23,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:34:23,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:34:23,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:34:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:34:23,667 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-07-22 21:34:23,668 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:23,668 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:34:23,706 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:34:23,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 330 places, 398 transitions, 826 flow [2022-07-22 21:34:23,794 INFO L129 PetriNetUnfolder]: 168/889 cut-off events. [2022-07-22 21:34:23,794 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:34:23,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 889 events. 168/889 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4860 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 630. Up to 16 conditions per place. [2022-07-22 21:34:23,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 398 transitions, 826 flow [2022-07-22 21:34:23,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 398 transitions, 826 flow [2022-07-22 21:34:23,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:23,823 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@2a2ad46d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42a0829 [2022-07-22 21:34:23,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:34:23,828 INFO L129 PetriNetUnfolder]: 17/149 cut-off events. [2022-07-22 21:34:23,828 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:23,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:23,829 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] [2022-07-22 21:34:23,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash -890788929, now seen corresponding path program 1 times [2022-07-22 21:34:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:23,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813736744] [2022-07-22 21:34:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,841 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 21:34:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:23,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813736744] [2022-07-22 21:34:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813736744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:23,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:23,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462127562] [2022-07-22 21:34:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:23,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 398 [2022-07-22 21:34:23,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 826 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 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 21:34:23,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:23,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 398 [2022-07-22 21:34:23,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:23,949 INFO L129 PetriNetUnfolder]: 27/737 cut-off events. [2022-07-22 21:34:23,950 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-22 21:34:23,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 737 events. 27/737 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4191 event pairs, 1 based on Foata normal form. 256/951 useless extension candidates. Maximal degree in co-relation 527. Up to 16 conditions per place. [2022-07-22 21:34:23,959 INFO L132 encePairwiseOnDemand]: 336/398 looper letters, 6 selfloop transitions, 0 changer transitions 0/331 dead transitions. [2022-07-22 21:34:23,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 331 transitions, 704 flow [2022-07-22 21:34:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 718 transitions. [2022-07-22 21:34:23,961 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9020100502512562 [2022-07-22 21:34:23,961 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 718 transitions. [2022-07-22 21:34:23,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 718 transitions. [2022-07-22 21:34:23,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:23,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 718 transitions. [2022-07-22 21:34:23,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 359.0) internal successors, (718), 2 states have internal predecessors, (718), 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 21:34:23,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 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 21:34:23,964 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 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 21:34:23,964 INFO L186 Difference]: Start difference. First operand has 330 places, 398 transitions, 826 flow. Second operand 2 states and 718 transitions. [2022-07-22 21:34:23,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 331 transitions, 704 flow [2022-07-22 21:34:23,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 331 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:23,968 INFO L242 Difference]: Finished difference. Result has 326 places, 331 transitions, 692 flow [2022-07-22 21:34:23,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=692, PETRI_PLACES=326, PETRI_TRANSITIONS=331} [2022-07-22 21:34:23,970 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, -4 predicate places. [2022-07-22 21:34:23,970 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 331 transitions, 692 flow [2022-07-22 21:34:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 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 21:34:23,970 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:23,970 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] [2022-07-22 21:34:23,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:34:23,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash 616762880, now seen corresponding path program 1 times [2022-07-22 21:34:23,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:23,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945750619] [2022-07-22 21:34:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:23,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:23,991 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 21:34:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945750619] [2022-07-22 21:34:23,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945750619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:23,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:23,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351974658] [2022-07-22 21:34:23,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:23,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:23,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:23,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-07-22 21:34:23,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 331 transitions, 692 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 21:34:23,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:23,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-07-22 21:34:23,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,092 INFO L129 PetriNetUnfolder]: 27/741 cut-off events. [2022-07-22 21:34:24,092 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-22 21:34:24,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 741 events. 27/741 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4162 event pairs, 1 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 791. Up to 23 conditions per place. [2022-07-22 21:34:24,103 INFO L132 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/335 dead transitions. [2022-07-22 21:34:24,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 335 transitions, 734 flow [2022-07-22 21:34:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-22 21:34:24,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-07-22 21:34:24,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-22 21:34:24,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-22 21:34:24,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-22 21:34:24,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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 21:34:24,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 21:34:24,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 21:34:24,108 INFO L186 Difference]: Start difference. First operand has 326 places, 331 transitions, 692 flow. Second operand 3 states and 972 transitions. [2022-07-22 21:34:24,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 335 transitions, 734 flow [2022-07-22 21:34:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 335 transitions, 734 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:24,112 INFO L242 Difference]: Finished difference. Result has 329 places, 332 transitions, 704 flow [2022-07-22 21:34:24,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=329, PETRI_TRANSITIONS=332} [2022-07-22 21:34:24,113 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, -1 predicate places. [2022-07-22 21:34:24,114 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 332 transitions, 704 flow [2022-07-22 21:34:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 21:34:24,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,114 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] [2022-07-22 21:34:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:34:24,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1846734079, now seen corresponding path program 1 times [2022-07-22 21:34:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:24,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61552713] [2022-07-22 21:34:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:24,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:24,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61552713] [2022-07-22 21:34:24,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61552713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:24,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771022864] [2022-07-22 21:34:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:24,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:24,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:34:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:24,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:24,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771022864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:24,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:24,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762943873] [2022-07-22 21:34:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:24,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:24,246 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 398 [2022-07-22 21:34:24,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 332 transitions, 704 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 21:34:24,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:24,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 398 [2022-07-22 21:34:24,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,333 INFO L129 PetriNetUnfolder]: 23/645 cut-off events. [2022-07-22 21:34:24,334 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-22 21:34:24,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 645 events. 23/645 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3490 event pairs, 1 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 708. Up to 30 conditions per place. [2022-07-22 21:34:24,343 INFO L132 encePairwiseOnDemand]: 395/398 looper letters, 15 selfloop transitions, 2 changer transitions 0/336 dead transitions. [2022-07-22 21:34:24,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 336 transitions, 746 flow [2022-07-22 21:34:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-22 21:34:24,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8140703517587939 [2022-07-22 21:34:24,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-22 21:34:24,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-22 21:34:24,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-22 21:34:24,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 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 21:34:24,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 21:34:24,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 21:34:24,351 INFO L186 Difference]: Start difference. First operand has 329 places, 332 transitions, 704 flow. Second operand 3 states and 972 transitions. [2022-07-22 21:34:24,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 336 transitions, 746 flow [2022-07-22 21:34:24,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 336 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:24,355 INFO L242 Difference]: Finished difference. Result has 331 places, 333 transitions, 714 flow [2022-07-22 21:34:24,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=331, PETRI_TRANSITIONS=333} [2022-07-22 21:34:24,357 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 1 predicate places. [2022-07-22 21:34:24,357 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 333 transitions, 714 flow [2022-07-22 21:34:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 21:34:24,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,357 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] [2022-07-22 21:34:24,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:24,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 21:34:24,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1623135996, now seen corresponding path program 1 times [2022-07-22 21:34:24,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:24,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084688872] [2022-07-22 21:34:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084688872] [2022-07-22 21:34:24,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084688872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221400425] [2022-07-22 21:34:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:24,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:24,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:24,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:34:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:34:24,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:24,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221400425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:24,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:24,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199299560] [2022-07-22 21:34:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:24,694 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-07-22 21:34:24,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 333 transitions, 714 flow. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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 21:34:24,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:24,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-07-22 21:34:24,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:24,802 INFO L129 PetriNetUnfolder]: 26/798 cut-off events. [2022-07-22 21:34:24,802 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:34:24,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 798 events. 26/798 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3989 event pairs, 1 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 881. Up to 36 conditions per place. [2022-07-22 21:34:24,816 INFO L132 encePairwiseOnDemand]: 395/398 looper letters, 16 selfloop transitions, 2 changer transitions 0/337 dead transitions. [2022-07-22 21:34:24,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 758 flow [2022-07-22 21:34:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2022-07-22 21:34:24,818 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8123953098827471 [2022-07-22 21:34:24,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2022-07-22 21:34:24,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2022-07-22 21:34:24,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:24,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2022-07-22 21:34:24,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 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 21:34:24,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 21:34:24,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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 21:34:24,821 INFO L186 Difference]: Start difference. First operand has 331 places, 333 transitions, 714 flow. Second operand 3 states and 970 transitions. [2022-07-22 21:34:24,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 758 flow [2022-07-22 21:34:24,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 337 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:24,825 INFO L242 Difference]: Finished difference. Result has 333 places, 334 transitions, 724 flow [2022-07-22 21:34:24,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=724, PETRI_PLACES=333, PETRI_TRANSITIONS=334} [2022-07-22 21:34:24,826 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-07-22 21:34:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 334 transitions, 724 flow [2022-07-22 21:34:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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 21:34:24,827 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:24,827 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] [2022-07-22 21:34:24,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:25,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 21:34:25,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1970085585, now seen corresponding path program 1 times [2022-07-22 21:34:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:25,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097643830] [2022-07-22 21:34:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097643830] [2022-07-22 21:34:25,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097643830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540259504] [2022-07-22 21:34:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:25,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:25,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:34:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:25,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:25,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540259504] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:25,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:25,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659814816] [2022-07-22 21:34:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:25,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 398 [2022-07-22 21:34:25,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 334 transitions, 724 flow. Second operand has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 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 21:34:25,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:25,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 398 [2022-07-22 21:34:25,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:25,426 INFO L129 PetriNetUnfolder]: 26/805 cut-off events. [2022-07-22 21:34:25,426 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-22 21:34:25,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 805 events. 26/805 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3974 event pairs, 1 based on Foata normal form. 2/772 useless extension candidates. Maximal degree in co-relation 890. Up to 20 conditions per place. [2022-07-22 21:34:25,439 INFO L132 encePairwiseOnDemand]: 392/398 looper letters, 16 selfloop transitions, 9 changer transitions 0/344 dead transitions. [2022-07-22 21:34:25,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 344 transitions, 796 flow [2022-07-22 21:34:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2880 transitions. [2022-07-22 21:34:25,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8040201005025126 [2022-07-22 21:34:25,442 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2880 transitions. [2022-07-22 21:34:25,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2880 transitions. [2022-07-22 21:34:25,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:25,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2880 transitions. [2022-07-22 21:34:25,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 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 21:34:25,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 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 21:34:25,448 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 398.0) internal successors, (3980), 10 states have internal predecessors, (3980), 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 21:34:25,448 INFO L186 Difference]: Start difference. First operand has 333 places, 334 transitions, 724 flow. Second operand 9 states and 2880 transitions. [2022-07-22 21:34:25,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 344 transitions, 796 flow [2022-07-22 21:34:25,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 344 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:25,453 INFO L242 Difference]: Finished difference. Result has 343 places, 340 transitions, 772 flow [2022-07-22 21:34:25,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=343, PETRI_TRANSITIONS=340} [2022-07-22 21:34:25,454 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-07-22 21:34:25,454 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 340 transitions, 772 flow [2022-07-22 21:34:25,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.1) internal successors, (3191), 10 states have internal predecessors, (3191), 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 21:34:25,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:25,455 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:25,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:25,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:34:25,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:34:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash 566379377, now seen corresponding path program 2 times [2022-07-22 21:34:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:25,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498496671] [2022-07-22 21:34:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:25,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:25,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:25,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498496671] [2022-07-22 21:34:25,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498496671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:25,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297640504] [2022-07-22 21:34:25,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:25,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:25,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:25,756 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:25,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:34:25,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:34:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:34:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:25,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-22 21:34:26,031 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:34:26,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:34:26,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-22 21:34:26,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-22 21:34:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 21:34:26,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:26,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297640504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:26,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:26,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-07-22 21:34:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747830311] [2022-07-22 21:34:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:34:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:34:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:34:26,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 398 [2022-07-22 21:34:26,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 340 transitions, 772 flow. Second operand has 12 states, 12 states have (on average 267.3333333333333) internal successors, (3208), 12 states have internal predecessors, (3208), 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 21:34:26,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:26,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 398 [2022-07-22 21:34:26,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand