./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_76-tricky_address3_racefree.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 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:58:10,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:58:10,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:58:10,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:58:10,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:58:10,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:58:10,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:58:10,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:58:10,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:58:10,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:58:10,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:58:10,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:58:10,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:58:10,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:58:10,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:58:10,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:58:10,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:58:10,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:58:10,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:58:10,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:58:10,858 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:58:10,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:58:10,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:58:10,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:58:10,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:58:10,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:58:10,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:58:10,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:58:10,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:58:10,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:58:10,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:58:10,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:58:10,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:58:10,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:58:10,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:58:10,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:58:10,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:58:10,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:58:10,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:58:10,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:58:10,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:58:10,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:58:10,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:58:10,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:58:10,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:58:10,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:58:10,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:58:10,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:58:10,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:58:10,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:58:10,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:58:10,901 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:58:10,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:58:10,902 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:58:10,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:58:10,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:58:10,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:58:10,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:58:10,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:58:10,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:58:10,903 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:58:10,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:58:10,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:58:10,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:58:10,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:58:10,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:58:10,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:58:10,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:58:10,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:58:10,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:58:10,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:58:10,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:58:10,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:58:10,906 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:58:10,906 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:58:10,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:58:10,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 [2022-07-13 21:58:11,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:58:11,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:58:11,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:58:11,115 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:58:11,115 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:58:11,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2022-07-13 21:58:11,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8063d97/5b8b7f7240ea41bca55a76bfaa5a6131/FLAGfb5e3f601 [2022-07-13 21:58:11,566 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:58:11,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2022-07-13 21:58:11,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8063d97/5b8b7f7240ea41bca55a76bfaa5a6131/FLAGfb5e3f601 [2022-07-13 21:58:11,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8063d97/5b8b7f7240ea41bca55a76bfaa5a6131 [2022-07-13 21:58:11,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:58:11,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:58:11,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:58:11,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:58:11,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:58:11,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:58:11" (1/1) ... [2022-07-13 21:58:11,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbd1d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:11, skipping insertion in model container [2022-07-13 21:58:11,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:58:11" (1/1) ... [2022-07-13 21:58:11,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:58:11,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:58:12,300 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_76-tricky_address3_racefree.i[41323,41336] [2022-07-13 21:58:12,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:58:12,344 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:58:12,392 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_76-tricky_address3_racefree.i[41323,41336] [2022-07-13 21:58:12,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:58:12,463 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:58:12,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12 WrapperNode [2022-07-13 21:58:12,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:58:12,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:58:12,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:58:12,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:58:12,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,519 INFO L137 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-07-13 21:58:12,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:58:12,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:58:12,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:58:12,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:58:12,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:58:12,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:58:12,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:58:12,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:58:12,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (1/1) ... [2022-07-13 21:58:12,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:58:12,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:12,585 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) [2022-07-13 21:58:12,586 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 [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:58:12,617 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:58:12,618 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:58:12,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:58:12,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:58:12,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:58:12,631 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:58:12,729 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:58:12,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:58:12,994 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:58:13,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:58:13,003 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-13 21:58:13,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:58:13 BoogieIcfgContainer [2022-07-13 21:58:13,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:58:13,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:58:13,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:58:13,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:58:13,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:58:11" (1/3) ... [2022-07-13 21:58:13,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc264d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:58:13, skipping insertion in model container [2022-07-13 21:58:13,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:58:12" (2/3) ... [2022-07-13 21:58:13,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc264d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:58:13, skipping insertion in model container [2022-07-13 21:58:13,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:58:13" (3/3) ... [2022-07-13 21:58:13,014 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2022-07-13 21:58:13,019 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:58:13,026 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:58:13,027 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:58:13,027 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:58:13,101 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:58:13,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 408 flow [2022-07-13 21:58:13,229 INFO L129 PetriNetUnfolder]: 45/272 cut-off events. [2022-07-13 21:58:13,229 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-13 21:58:13,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 272 events. 45/272 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 842 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-07-13 21:58:13,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 408 flow [2022-07-13 21:58:13,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 395 flow [2022-07-13 21:58:13,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:13,260 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@38a4a049, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3804b498 [2022-07-13 21:58:13,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:58:13,284 INFO L129 PetriNetUnfolder]: 14/131 cut-off events. [2022-07-13 21:58:13,285 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:13,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:13,286 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, 1, 1, 1] [2022-07-13 21:58:13,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash -959674574, now seen corresponding path program 1 times [2022-07-13 21:58:13,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:13,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136959744] [2022-07-13 21:58:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:13,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:13,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136959744] [2022-07-13 21:58:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136959744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:13,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:13,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352614391] [2022-07-13 21:58:13,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:13,511 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-07-13 21:58:13,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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) [2022-07-13 21:58:13,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:13,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-07-13 21:58:13,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:13,571 INFO L129 PetriNetUnfolder]: 4/228 cut-off events. [2022-07-13 21:58:13,571 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:13,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 228 events. 4/228 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 629 event pairs, 0 based on Foata normal form. 39/254 useless extension candidates. Maximal degree in co-relation 125. Up to 9 conditions per place. [2022-07-13 21:58:13,576 INFO L132 encePairwiseOnDemand]: 170/200 looper letters, 10 selfloop transitions, 2 changer transitions 1/170 dead transitions. [2022-07-13 21:58:13,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 170 transitions, 369 flow [2022-07-13 21:58:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2022-07-13 21:58:13,591 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8783333333333333 [2022-07-13 21:58:13,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2022-07-13 21:58:13,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2022-07-13 21:58:13,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:13,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2022-07-13 21:58:13,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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) [2022-07-13 21:58:13,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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) [2022-07-13 21:58:13,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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) [2022-07-13 21:58:13,609 INFO L186 Difference]: Start difference. First operand has 168 places, 195 transitions, 395 flow. Second operand 3 states and 527 transitions. [2022-07-13 21:58:13,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 170 transitions, 369 flow [2022-07-13 21:58:13,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 170 transitions, 369 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:13,616 INFO L242 Difference]: Finished difference. Result has 169 places, 166 transitions, 347 flow [2022-07-13 21:58:13,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2022-07-13 21:58:13,620 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2022-07-13 21:58:13,620 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 347 flow [2022-07-13 21:58:13,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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) [2022-07-13 21:58:13,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:13,623 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:13,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:58:13,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1718762197, now seen corresponding path program 1 times [2022-07-13 21:58:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:13,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406823829] [2022-07-13 21:58:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:13,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:13,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406823829] [2022-07-13 21:58:13,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406823829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:13,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424508722] [2022-07-13 21:58:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:13,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:13,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:13,724 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) [2022-07-13 21:58:13,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:58:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:13,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:13,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:13,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:13,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424508722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:13,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:13,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798821146] [2022-07-13 21:58:13,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:13,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:13,951 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-13 21:58:13,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 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) [2022-07-13 21:58:13,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:13,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-13 21:58:13,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:14,031 INFO L129 PetriNetUnfolder]: 4/234 cut-off events. [2022-07-13 21:58:14,031 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:58:14,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 234 events. 4/234 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 227. Up to 6 conditions per place. [2022-07-13 21:58:14,033 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 11 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-07-13 21:58:14,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 176 transitions, 409 flow [2022-07-13 21:58:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1471 transitions. [2022-07-13 21:58:14,041 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8172222222222222 [2022-07-13 21:58:14,042 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1471 transitions. [2022-07-13 21:58:14,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1471 transitions. [2022-07-13 21:58:14,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:14,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1471 transitions. [2022-07-13 21:58:14,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 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) [2022-07-13 21:58:14,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 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) [2022-07-13 21:58:14,049 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 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) [2022-07-13 21:58:14,049 INFO L186 Difference]: Start difference. First operand has 169 places, 166 transitions, 347 flow. Second operand 9 states and 1471 transitions. [2022-07-13 21:58:14,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 176 transitions, 409 flow [2022-07-13 21:58:14,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:14,053 INFO L242 Difference]: Finished difference. Result has 178 places, 172 transitions, 395 flow [2022-07-13 21:58:14,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=178, PETRI_TRANSITIONS=172} [2022-07-13 21:58:14,054 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 10 predicate places. [2022-07-13 21:58:14,054 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 172 transitions, 395 flow [2022-07-13 21:58:14,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 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) [2022-07-13 21:58:14,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:14,055 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:14,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:14,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2122069387, now seen corresponding path program 2 times [2022-07-13 21:58:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355788287] [2022-07-13 21:58:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:14,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:14,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355788287] [2022-07-13 21:58:14,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355788287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:14,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089063057] [2022-07-13 21:58:14,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:14,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:14,419 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) [2022-07-13 21:58:14,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:58:14,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:14,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:14,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089063057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:14,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:14,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841656773] [2022-07-13 21:58:14,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:14,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-13 21:58:14,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 172 transitions, 395 flow. Second operand has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 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) [2022-07-13 21:58:14,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:14,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-13 21:58:14,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:14,850 INFO L129 PetriNetUnfolder]: 4/254 cut-off events. [2022-07-13 21:58:14,850 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-13 21:58:14,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 254 events. 4/254 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 4/247 useless extension candidates. Maximal degree in co-relation 221. Up to 11 conditions per place. [2022-07-13 21:58:14,852 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 19 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2022-07-13 21:58:14,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 196 transitions, 583 flow [2022-07-13 21:58:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3425 transitions. [2022-07-13 21:58:14,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154761904761905 [2022-07-13 21:58:14,858 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3425 transitions. [2022-07-13 21:58:14,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3425 transitions. [2022-07-13 21:58:14,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:14,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3425 transitions. [2022-07-13 21:58:14,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.0952380952381) internal successors, (3425), 21 states have internal predecessors, (3425), 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) [2022-07-13 21:58:14,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 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) [2022-07-13 21:58:14,871 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 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) [2022-07-13 21:58:14,871 INFO L186 Difference]: Start difference. First operand has 178 places, 172 transitions, 395 flow. Second operand 21 states and 3425 transitions. [2022-07-13 21:58:14,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 196 transitions, 583 flow [2022-07-13 21:58:14,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 196 transitions, 569 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:14,878 INFO L242 Difference]: Finished difference. Result has 202 places, 185 transitions, 519 flow [2022-07-13 21:58:14,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=519, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2022-07-13 21:58:14,880 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 34 predicate places. [2022-07-13 21:58:14,880 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 519 flow [2022-07-13 21:58:14,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 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) [2022-07-13 21:58:14,881 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:14,881 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:14,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:15,095 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,SelfDestructingSolverStorable2 [2022-07-13 21:58:15,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1016344139, now seen corresponding path program 3 times [2022-07-13 21:58:15,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:15,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544405535] [2022-07-13 21:58:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:15,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:15,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544405535] [2022-07-13 21:58:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544405535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255738428] [2022-07-13 21:58:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:58:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:15,310 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) [2022-07-13 21:58:15,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:58:15,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:58:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:15,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:15,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:15,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:58:15,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255738428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:15,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:15,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:15,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166791475] [2022-07-13 21:58:15,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:15,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:15,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:15,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-13 21:58:15,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 519 flow. Second operand has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 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) [2022-07-13 21:58:15,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:15,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-13 21:58:15,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:15,849 INFO L129 PetriNetUnfolder]: 4/269 cut-off events. [2022-07-13 21:58:15,849 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:58:15,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 269 events. 4/269 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 3/261 useless extension candidates. Maximal degree in co-relation 317. Up to 17 conditions per place. [2022-07-13 21:58:15,851 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 25 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2022-07-13 21:58:15,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 211 transitions, 775 flow [2022-07-13 21:58:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4888 transitions. [2022-07-13 21:58:15,860 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8146666666666667 [2022-07-13 21:58:15,860 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4888 transitions. [2022-07-13 21:58:15,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4888 transitions. [2022-07-13 21:58:15,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:15,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4888 transitions. [2022-07-13 21:58:15,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 162.93333333333334) internal successors, (4888), 30 states have internal predecessors, (4888), 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) [2022-07-13 21:58:15,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 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) [2022-07-13 21:58:15,880 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 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) [2022-07-13 21:58:15,881 INFO L186 Difference]: Start difference. First operand has 202 places, 185 transitions, 519 flow. Second operand 30 states and 4888 transitions. [2022-07-13 21:58:15,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 211 transitions, 775 flow [2022-07-13 21:58:15,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 211 transitions, 745 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:15,886 INFO L242 Difference]: Finished difference. Result has 229 places, 195 transitions, 647 flow [2022-07-13 21:58:15,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=647, PETRI_PLACES=229, PETRI_TRANSITIONS=195} [2022-07-13 21:58:15,887 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 61 predicate places. [2022-07-13 21:58:15,887 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 195 transitions, 647 flow [2022-07-13 21:58:15,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 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) [2022-07-13 21:58:15,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:15,888 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:15,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:16,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:58:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash 282089810, now seen corresponding path program 4 times [2022-07-13 21:58:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:16,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370686648] [2022-07-13 21:58:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:16,120 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:16,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:16,180 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:16,181 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:58:16,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:58:16,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-13 21:58:16,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:58:16,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:58:16,187 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1] [2022-07-13 21:58:16,191 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:16,191 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:58:16,218 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:58:16,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-07-13 21:58:16,259 INFO L129 PetriNetUnfolder]: 75/444 cut-off events. [2022-07-13 21:58:16,260 INFO L130 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-07-13 21:58:16,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1728 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-07-13 21:58:16,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 568 flow [2022-07-13 21:58:16,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 568 flow [2022-07-13 21:58:16,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:16,273 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@38a4a049, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3804b498 [2022-07-13 21:58:16,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:58:16,279 INFO L129 PetriNetUnfolder]: 15/134 cut-off events. [2022-07-13 21:58:16,279 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:16,279 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:16,279 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] [2022-07-13 21:58:16,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash -451559023, now seen corresponding path program 1 times [2022-07-13 21:58:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:16,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533213024] [2022-07-13 21:58:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:16,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533213024] [2022-07-13 21:58:16,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533213024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:16,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:16,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:58:16,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113233171] [2022-07-13 21:58:16,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:16,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:58:16,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:16,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:58:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:58:16,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 275 [2022-07-13 21:58:16,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 275 transitions, 568 flow. Second operand has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 states have internal predecessors, (460), 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) [2022-07-13 21:58:16,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:16,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 275 [2022-07-13 21:58:16,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:16,346 INFO L129 PetriNetUnfolder]: 9/373 cut-off events. [2022-07-13 21:58:16,346 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-13 21:58:16,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 373 events. 9/373 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1442 event pairs, 0 based on Foata normal form. 91/443 useless extension candidates. Maximal degree in co-relation 233. Up to 7 conditions per place. [2022-07-13 21:58:16,350 INFO L132 encePairwiseOnDemand]: 236/275 looper letters, 4 selfloop transitions, 0 changer transitions 1/233 dead transitions. [2022-07-13 21:58:16,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 233 transitions, 492 flow [2022-07-13 21:58:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:58:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:58:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-07-13 21:58:16,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9109090909090909 [2022-07-13 21:58:16,351 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-07-13 21:58:16,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-07-13 21:58:16,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:16,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-07-13 21:58:16,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 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) [2022-07-13 21:58:16,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 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) [2022-07-13 21:58:16,354 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 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) [2022-07-13 21:58:16,354 INFO L186 Difference]: Start difference. First operand has 235 places, 275 transitions, 568 flow. Second operand 2 states and 501 transitions. [2022-07-13 21:58:16,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 233 transitions, 492 flow [2022-07-13 21:58:16,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 233 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:16,357 INFO L242 Difference]: Finished difference. Result has 233 places, 232 transitions, 482 flow [2022-07-13 21:58:16,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=482, PETRI_PLACES=233, PETRI_TRANSITIONS=232} [2022-07-13 21:58:16,358 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, -2 predicate places. [2022-07-13 21:58:16,358 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 232 transitions, 482 flow [2022-07-13 21:58:16,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 states have internal predecessors, (460), 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) [2022-07-13 21:58:16,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:16,358 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] [2022-07-13 21:58:16,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:58:16,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2017606803, now seen corresponding path program 1 times [2022-07-13 21:58:16,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:16,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003637073] [2022-07-13 21:58:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:16,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003637073] [2022-07-13 21:58:16,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003637073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:16,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:16,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219365698] [2022-07-13 21:58:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:16,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:16,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:16,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-07-13 21:58:16,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 232 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2022-07-13 21:58:16,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:16,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-07-13 21:58:16,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:16,420 INFO L129 PetriNetUnfolder]: 9/376 cut-off events. [2022-07-13 21:58:16,420 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-13 21:58:16,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 376 events. 9/376 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1438 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 404. Up to 14 conditions per place. [2022-07-13 21:58:16,425 INFO L132 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-07-13 21:58:16,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 236 transitions, 520 flow [2022-07-13 21:58:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-13 21:58:16,427 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-07-13 21:58:16,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-13 21:58:16,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-13 21:58:16,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:16,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-13 21:58:16,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-07-13 21:58:16,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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) [2022-07-13 21:58:16,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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) [2022-07-13 21:58:16,430 INFO L186 Difference]: Start difference. First operand has 233 places, 232 transitions, 482 flow. Second operand 3 states and 682 transitions. [2022-07-13 21:58:16,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 236 transitions, 520 flow [2022-07-13 21:58:16,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:16,433 INFO L242 Difference]: Finished difference. Result has 235 places, 233 transitions, 494 flow [2022-07-13 21:58:16,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=235, PETRI_TRANSITIONS=233} [2022-07-13 21:58:16,434 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 0 predicate places. [2022-07-13 21:58:16,434 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 233 transitions, 494 flow [2022-07-13 21:58:16,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2022-07-13 21:58:16,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:16,434 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] [2022-07-13 21:58:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:58:16,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1078955039, now seen corresponding path program 1 times [2022-07-13 21:58:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595186685] [2022-07-13 21:58:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:16,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:16,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595186685] [2022-07-13 21:58:16,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595186685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:16,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083798545] [2022-07-13 21:58:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:16,465 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) [2022-07-13 21:58:16,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:58:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:58:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:16,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:58:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083798545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:16,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:58:16,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:58:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147789760] [2022-07-13 21:58:16,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:58:16,543 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-07-13 21:58:16,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 233 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2022-07-13 21:58:16,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:16,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-07-13 21:58:16,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:16,595 INFO L129 PetriNetUnfolder]: 7/331 cut-off events. [2022-07-13 21:58:16,595 INFO L130 PetriNetUnfolder]: For 21/45 co-relation queries the response was YES. [2022-07-13 21:58:16,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 331 events. 7/331 cut-off events. For 21/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1126 event pairs, 0 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 367. Up to 16 conditions per place. [2022-07-13 21:58:16,599 INFO L132 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2022-07-13 21:58:16,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 532 flow [2022-07-13 21:58:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-13 21:58:16,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-07-13 21:58:16,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-13 21:58:16,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-13 21:58:16,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:16,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-13 21:58:16,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-07-13 21:58:16,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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) [2022-07-13 21:58:16,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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) [2022-07-13 21:58:16,611 INFO L186 Difference]: Start difference. First operand has 235 places, 233 transitions, 494 flow. Second operand 3 states and 682 transitions. [2022-07-13 21:58:16,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 532 flow [2022-07-13 21:58:16,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:16,621 INFO L242 Difference]: Finished difference. Result has 237 places, 234 transitions, 504 flow [2022-07-13 21:58:16,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=237, PETRI_TRANSITIONS=234} [2022-07-13 21:58:16,622 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 2 predicate places. [2022-07-13 21:58:16,622 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 234 transitions, 504 flow [2022-07-13 21:58:16,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2022-07-13 21:58:16,623 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:16,623 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:16,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:16,825 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 [2022-07-13 21:58:16,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1849767997, now seen corresponding path program 1 times [2022-07-13 21:58:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222751424] [2022-07-13 21:58:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:16,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:16,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222751424] [2022-07-13 21:58:16,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222751424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:16,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796197589] [2022-07-13 21:58:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:16,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:16,850 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) [2022-07-13 21:58:16,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:58:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:16,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:16,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796197589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:16,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:16,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:16,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86129968] [2022-07-13 21:58:16,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:16,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-13 21:58:16,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 234 transitions, 504 flow. Second operand has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 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) [2022-07-13 21:58:16,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:16,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-13 21:58:16,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:17,073 INFO L129 PetriNetUnfolder]: 7/338 cut-off events. [2022-07-13 21:58:17,073 INFO L130 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-07-13 21:58:17,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 338 events. 7/338 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 385. Up to 11 conditions per place. [2022-07-13 21:58:17,077 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 14 selfloop transitions, 9 changer transitions 0/244 dead transitions. [2022-07-13 21:58:17,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 244 transitions, 572 flow [2022-07-13 21:58:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2014 transitions. [2022-07-13 21:58:17,081 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8137373737373738 [2022-07-13 21:58:17,081 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2014 transitions. [2022-07-13 21:58:17,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2014 transitions. [2022-07-13 21:58:17,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:17,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2014 transitions. [2022-07-13 21:58:17,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.77777777777777) internal successors, (2014), 9 states have internal predecessors, (2014), 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) [2022-07-13 21:58:17,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 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) [2022-07-13 21:58:17,087 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 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) [2022-07-13 21:58:17,087 INFO L186 Difference]: Start difference. First operand has 237 places, 234 transitions, 504 flow. Second operand 9 states and 2014 transitions. [2022-07-13 21:58:17,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 244 transitions, 572 flow [2022-07-13 21:58:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 244 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:17,090 INFO L242 Difference]: Finished difference. Result has 247 places, 240 transitions, 552 flow [2022-07-13 21:58:17,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=552, PETRI_PLACES=247, PETRI_TRANSITIONS=240} [2022-07-13 21:58:17,092 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 12 predicate places. [2022-07-13 21:58:17,093 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 240 transitions, 552 flow [2022-07-13 21:58:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 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) [2022-07-13 21:58:17,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:17,093 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:17,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:17,309 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 [2022-07-13 21:58:17,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:17,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1597542211, now seen corresponding path program 2 times [2022-07-13 21:58:17,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489487756] [2022-07-13 21:58:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:17,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489487756] [2022-07-13 21:58:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489487756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715768104] [2022-07-13 21:58:17,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:17,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:17,365 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) [2022-07-13 21:58:17,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:58:17,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:17,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:17,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:17,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:17,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:17,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715768104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:17,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:17,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816375180] [2022-07-13 21:58:17,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:17,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-13 21:58:17,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 240 transitions, 552 flow. Second operand has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 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) [2022-07-13 21:58:17,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:17,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-13 21:58:17,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:17,714 INFO L129 PetriNetUnfolder]: 7/358 cut-off events. [2022-07-13 21:58:17,715 INFO L130 PetriNetUnfolder]: For 40/44 co-relation queries the response was YES. [2022-07-13 21:58:17,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 358 events. 7/358 cut-off events. For 40/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 472. Up to 11 conditions per place. [2022-07-13 21:58:17,718 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 22 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2022-07-13 21:58:17,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 264 transitions, 746 flow [2022-07-13 21:58:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4688 transitions. [2022-07-13 21:58:17,728 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8117748917748918 [2022-07-13 21:58:17,729 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4688 transitions. [2022-07-13 21:58:17,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4688 transitions. [2022-07-13 21:58:17,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:17,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4688 transitions. [2022-07-13 21:58:17,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 223.23809523809524) internal successors, (4688), 21 states have internal predecessors, (4688), 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) [2022-07-13 21:58:17,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 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) [2022-07-13 21:58:17,745 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 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) [2022-07-13 21:58:17,746 INFO L186 Difference]: Start difference. First operand has 247 places, 240 transitions, 552 flow. Second operand 21 states and 4688 transitions. [2022-07-13 21:58:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 264 transitions, 746 flow [2022-07-13 21:58:17,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 264 transitions, 732 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:17,751 INFO L242 Difference]: Finished difference. Result has 271 places, 253 transitions, 676 flow [2022-07-13 21:58:17,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=676, PETRI_PLACES=271, PETRI_TRANSITIONS=253} [2022-07-13 21:58:17,752 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 36 predicate places. [2022-07-13 21:58:17,752 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 253 transitions, 676 flow [2022-07-13 21:58:17,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 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) [2022-07-13 21:58:17,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:17,753 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:17,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:17,970 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 [2022-07-13 21:58:17,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash -755629635, now seen corresponding path program 3 times [2022-07-13 21:58:17,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:17,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487668248] [2022-07-13 21:58:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:17,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487668248] [2022-07-13 21:58:18,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487668248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625444613] [2022-07-13 21:58:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:58:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:18,094 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) [2022-07-13 21:58:18,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:58:18,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:58:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:18,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:58:18,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625444613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:18,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:18,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67067582] [2022-07-13 21:58:18,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:18,338 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-13 21:58:18,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 253 transitions, 676 flow. Second operand has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 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) [2022-07-13 21:58:18,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:18,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-13 21:58:18,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:18,592 INFO L129 PetriNetUnfolder]: 7/373 cut-off events. [2022-07-13 21:58:18,592 INFO L130 PetriNetUnfolder]: For 128/132 co-relation queries the response was YES. [2022-07-13 21:58:18,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 373 events. 7/373 cut-off events. For 128/132 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 3/362 useless extension candidates. Maximal degree in co-relation 568. Up to 17 conditions per place. [2022-07-13 21:58:18,615 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 28 selfloop transitions, 30 changer transitions 0/279 dead transitions. [2022-07-13 21:58:18,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 279 transitions, 938 flow [2022-07-13 21:58:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6691 transitions. [2022-07-13 21:58:18,621 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.811030303030303 [2022-07-13 21:58:18,622 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6691 transitions. [2022-07-13 21:58:18,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6691 transitions. [2022-07-13 21:58:18,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:18,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6691 transitions. [2022-07-13 21:58:18,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 223.03333333333333) internal successors, (6691), 30 states have internal predecessors, (6691), 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) [2022-07-13 21:58:18,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 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) [2022-07-13 21:58:18,638 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 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) [2022-07-13 21:58:18,638 INFO L186 Difference]: Start difference. First operand has 271 places, 253 transitions, 676 flow. Second operand 30 states and 6691 transitions. [2022-07-13 21:58:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 279 transitions, 938 flow [2022-07-13 21:58:18,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 279 transitions, 908 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:18,643 INFO L242 Difference]: Finished difference. Result has 298 places, 263 transitions, 804 flow [2022-07-13 21:58:18,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=804, PETRI_PLACES=298, PETRI_TRANSITIONS=263} [2022-07-13 21:58:18,643 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 63 predicate places. [2022-07-13 21:58:18,644 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 263 transitions, 804 flow [2022-07-13 21:58:18,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 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) [2022-07-13 21:58:18,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:18,645 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:18,859 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 [2022-07-13 21:58:18,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:58:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1849066191, now seen corresponding path program 4 times [2022-07-13 21:58:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:18,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755740898] [2022-07-13 21:58:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:18,877 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:18,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:18,922 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:18,922 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:58:18,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:58:18,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:58:18,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:58:18,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:58:18,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:58:18,922 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-13 21:58:18,923 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:18,923 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:58:18,948 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:58:18,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-07-13 21:58:19,018 INFO L129 PetriNetUnfolder]: 110/649 cut-off events. [2022-07-13 21:58:19,018 INFO L130 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-07-13 21:58:19,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2862 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-07-13 21:58:19,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 350 transitions, 730 flow [2022-07-13 21:58:19,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 350 transitions, 730 flow [2022-07-13 21:58:19,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:19,032 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@38a4a049, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3804b498 [2022-07-13 21:58:19,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:58:19,038 INFO L129 PetriNetUnfolder]: 13/134 cut-off events. [2022-07-13 21:58:19,038 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:19,038 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:19,038 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] [2022-07-13 21:58:19,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2017601518, now seen corresponding path program 1 times [2022-07-13 21:58:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52573184] [2022-07-13 21:58:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:19,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52573184] [2022-07-13 21:58:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52573184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:19,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:19,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351762931] [2022-07-13 21:58:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:19,058 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-07-13 21:58:19,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 350 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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) [2022-07-13 21:58:19,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:19,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-07-13 21:58:19,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:19,149 INFO L129 PetriNetUnfolder]: 16/552 cut-off events. [2022-07-13 21:58:19,149 INFO L130 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-07-13 21:58:19,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 552 events. 16/552 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2480 event pairs, 1 based on Foata normal form. 207/728 useless extension candidates. Maximal degree in co-relation 402. Up to 23 conditions per place. [2022-07-13 21:58:19,159 INFO L132 encePairwiseOnDemand]: 296/350 looper letters, 15 selfloop transitions, 2 changer transitions 1/299 dead transitions. [2022-07-13 21:58:19,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 299 transitions, 662 flow [2022-07-13 21:58:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-07-13 21:58:19,160 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8723809523809524 [2022-07-13 21:58:19,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-07-13 21:58:19,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-07-13 21:58:19,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:19,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-07-13 21:58:19,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 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) [2022-07-13 21:58:19,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 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) [2022-07-13 21:58:19,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 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) [2022-07-13 21:58:19,163 INFO L186 Difference]: Start difference. First operand has 298 places, 350 transitions, 730 flow. Second operand 3 states and 916 transitions. [2022-07-13 21:58:19,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 299 transitions, 662 flow [2022-07-13 21:58:19,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 299 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:19,167 INFO L242 Difference]: Finished difference. Result has 297 places, 295 transitions, 630 flow [2022-07-13 21:58:19,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=297, PETRI_TRANSITIONS=295} [2022-07-13 21:58:19,168 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, -1 predicate places. [2022-07-13 21:58:19,168 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 295 transitions, 630 flow [2022-07-13 21:58:19,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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) [2022-07-13 21:58:19,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:19,169 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] [2022-07-13 21:58:19,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:58:19,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash -115431363, now seen corresponding path program 1 times [2022-07-13 21:58:19,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:19,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737545929] [2022-07-13 21:58:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:19,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737545929] [2022-07-13 21:58:19,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737545929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:19,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720816977] [2022-07-13 21:58:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:19,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:19,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:19,196 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) [2022-07-13 21:58:19,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:58:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:58:19,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:19,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:58:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720816977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:19,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:58:19,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:58:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364820899] [2022-07-13 21:58:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:58:19,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-07-13 21:58:19,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 295 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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) [2022-07-13 21:58:19,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:19,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-07-13 21:58:19,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:19,340 INFO L129 PetriNetUnfolder]: 14/506 cut-off events. [2022-07-13 21:58:19,340 INFO L130 PetriNetUnfolder]: For 44/83 co-relation queries the response was YES. [2022-07-13 21:58:19,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 506 events. 14/506 cut-off events. For 44/83 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2174 event pairs, 1 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 538. Up to 30 conditions per place. [2022-07-13 21:58:19,347 INFO L132 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/299 dead transitions. [2022-07-13 21:58:19,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 299 transitions, 672 flow [2022-07-13 21:58:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-07-13 21:58:19,349 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-07-13 21:58:19,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-07-13 21:58:19,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-07-13 21:58:19,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:19,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-07-13 21:58:19,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 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) [2022-07-13 21:58:19,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 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) [2022-07-13 21:58:19,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 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) [2022-07-13 21:58:19,352 INFO L186 Difference]: Start difference. First operand has 297 places, 295 transitions, 630 flow. Second operand 3 states and 864 transitions. [2022-07-13 21:58:19,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 299 transitions, 672 flow [2022-07-13 21:58:19,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 299 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:19,356 INFO L242 Difference]: Finished difference. Result has 298 places, 296 transitions, 640 flow [2022-07-13 21:58:19,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=298, PETRI_TRANSITIONS=296} [2022-07-13 21:58:19,357 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 0 predicate places. [2022-07-13 21:58:19,357 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 296 transitions, 640 flow [2022-07-13 21:58:19,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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) [2022-07-13 21:58:19,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:19,357 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:19,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:19,571 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,SelfDestructingSolverStorable13 [2022-07-13 21:58:19,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash 417894738, now seen corresponding path program 1 times [2022-07-13 21:58:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960221325] [2022-07-13 21:58:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:19,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:19,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:19,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960221325] [2022-07-13 21:58:19,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960221325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:19,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845606237] [2022-07-13 21:58:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:19,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:19,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:19,594 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) [2022-07-13 21:58:19,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:58:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:19,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:19,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845606237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:19,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:19,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314049409] [2022-07-13 21:58:19,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:19,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:19,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:19,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-07-13 21:58:19,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 296 transitions, 640 flow. Second operand has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 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) [2022-07-13 21:58:19,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:19,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-07-13 21:58:19,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:19,799 INFO L129 PetriNetUnfolder]: 14/513 cut-off events. [2022-07-13 21:58:19,799 INFO L130 PetriNetUnfolder]: For 51/60 co-relation queries the response was YES. [2022-07-13 21:58:19,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 513 events. 14/513 cut-off events. For 51/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2169 event pairs, 1 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 520. Up to 20 conditions per place. [2022-07-13 21:58:19,807 INFO L132 encePairwiseOnDemand]: 344/350 looper letters, 16 selfloop transitions, 9 changer transitions 0/306 dead transitions. [2022-07-13 21:58:19,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 306 transitions, 712 flow [2022-07-13 21:58:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2556 transitions. [2022-07-13 21:58:19,810 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8114285714285714 [2022-07-13 21:58:19,810 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2556 transitions. [2022-07-13 21:58:19,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2556 transitions. [2022-07-13 21:58:19,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:19,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2556 transitions. [2022-07-13 21:58:19,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 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) [2022-07-13 21:58:19,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 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) [2022-07-13 21:58:19,836 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 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) [2022-07-13 21:58:19,836 INFO L186 Difference]: Start difference. First operand has 298 places, 296 transitions, 640 flow. Second operand 9 states and 2556 transitions. [2022-07-13 21:58:19,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 306 transitions, 712 flow [2022-07-13 21:58:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 306 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:19,840 INFO L242 Difference]: Finished difference. Result has 308 places, 302 transitions, 688 flow [2022-07-13 21:58:19,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=308, PETRI_TRANSITIONS=302} [2022-07-13 21:58:19,841 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 10 predicate places. [2022-07-13 21:58:19,841 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 302 transitions, 688 flow [2022-07-13 21:58:19,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 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) [2022-07-13 21:58:19,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:19,842 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, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:19,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:20,059 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,SelfDestructingSolverStorable14 [2022-07-13 21:58:20,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash 575842066, now seen corresponding path program 2 times [2022-07-13 21:58:20,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:20,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129971156] [2022-07-13 21:58:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 21:58:20,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129971156] [2022-07-13 21:58:20,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129971156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497369553] [2022-07-13 21:58:20,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:20,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:20,101 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) [2022-07-13 21:58:20,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:58:20,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:20,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:20,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:20,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497369553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:20,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-13 21:58:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329961337] [2022-07-13 21:58:20,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:58:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:58:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:58:20,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 350 [2022-07-13 21:58:20,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 302 transitions, 688 flow. Second operand has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 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) [2022-07-13 21:58:20,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:20,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 350 [2022-07-13 21:58:20,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:20,567 INFO L129 PetriNetUnfolder]: 12/488 cut-off events. [2022-07-13 21:58:20,567 INFO L130 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-07-13 21:58:20,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 488 events. 12/488 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1763 event pairs, 2 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 498. Up to 29 conditions per place. [2022-07-13 21:58:20,576 INFO L132 encePairwiseOnDemand]: 339/350 looper letters, 35 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2022-07-13 21:58:20,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 334 transitions, 936 flow [2022-07-13 21:58:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:58:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:58:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6916 transitions. [2022-07-13 21:58:20,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904 [2022-07-13 21:58:20,592 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6916 transitions. [2022-07-13 21:58:20,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6916 transitions. [2022-07-13 21:58:20,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:20,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6916 transitions. [2022-07-13 21:58:20,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 276.64) internal successors, (6916), 25 states have internal predecessors, (6916), 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) [2022-07-13 21:58:20,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 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) [2022-07-13 21:58:20,608 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 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) [2022-07-13 21:58:20,608 INFO L186 Difference]: Start difference. First operand has 308 places, 302 transitions, 688 flow. Second operand 25 states and 6916 transitions. [2022-07-13 21:58:20,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 334 transitions, 936 flow [2022-07-13 21:58:20,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 334 transitions, 922 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:20,613 INFO L242 Difference]: Finished difference. Result has 339 places, 318 transitions, 846 flow [2022-07-13 21:58:20,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=846, PETRI_PLACES=339, PETRI_TRANSITIONS=318} [2022-07-13 21:58:20,614 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 41 predicate places. [2022-07-13 21:58:20,614 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 318 transitions, 846 flow [2022-07-13 21:58:20,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 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) [2022-07-13 21:58:20,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:20,615 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:20,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:20,823 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,SelfDestructingSolverStorable15 [2022-07-13 21:58:20,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -302385302, now seen corresponding path program 1 times [2022-07-13 21:58:20,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:20,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228629155] [2022-07-13 21:58:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228629155] [2022-07-13 21:58:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228629155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548116572] [2022-07-13 21:58:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:20,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:20,956 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) [2022-07-13 21:58:20,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:58:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:21,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:21,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548116572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:21,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:21,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:21,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468452213] [2022-07-13 21:58:21,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:21,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:21,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:21,198 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-07-13 21:58:21,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 318 transitions, 846 flow. Second operand has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 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) [2022-07-13 21:58:21,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:21,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-07-13 21:58:21,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:21,561 INFO L129 PetriNetUnfolder]: 12/503 cut-off events. [2022-07-13 21:58:21,561 INFO L130 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-07-13 21:58:21,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 503 events. 12/503 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1767 event pairs, 2 based on Foata normal form. 3/485 useless extension candidates. Maximal degree in co-relation 531. Up to 20 conditions per place. [2022-07-13 21:58:21,571 INFO L132 encePairwiseOnDemand]: 344/350 looper letters, 30 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2022-07-13 21:58:21,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 344 transitions, 1112 flow [2022-07-13 21:58:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8493 transitions. [2022-07-13 21:58:21,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8088571428571428 [2022-07-13 21:58:21,579 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8493 transitions. [2022-07-13 21:58:21,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8493 transitions. [2022-07-13 21:58:21,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:21,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8493 transitions. [2022-07-13 21:58:21,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 283.1) internal successors, (8493), 30 states have internal predecessors, (8493), 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) [2022-07-13 21:58:21,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 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) [2022-07-13 21:58:21,608 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 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) [2022-07-13 21:58:21,608 INFO L186 Difference]: Start difference. First operand has 339 places, 318 transitions, 846 flow. Second operand 30 states and 8493 transitions. [2022-07-13 21:58:21,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 344 transitions, 1112 flow [2022-07-13 21:58:21,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 344 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-13 21:58:21,616 INFO L242 Difference]: Finished difference. Result has 365 places, 328 transitions, 970 flow [2022-07-13 21:58:21,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=970, PETRI_PLACES=365, PETRI_TRANSITIONS=328} [2022-07-13 21:58:21,617 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 67 predicate places. [2022-07-13 21:58:21,617 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 328 transitions, 970 flow [2022-07-13 21:58:21,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 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) [2022-07-13 21:58:21,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:21,619 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:21,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 21:58:21,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1140146688, now seen corresponding path program 2 times [2022-07-13 21:58:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:21,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843954167] [2022-07-13 21:58:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-13 21:58:22,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:22,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843954167] [2022-07-13 21:58:22,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843954167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:22,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:22,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 21:58:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756606470] [2022-07-13 21:58:22,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:22,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:58:22,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:22,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:58:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:58:22,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 350 [2022-07-13 21:58:22,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 328 transitions, 970 flow. Second operand has 13 states, 13 states have (on average 212.15384615384616) internal successors, (2758), 13 states have internal predecessors, (2758), 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) [2022-07-13 21:58:22,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:22,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 350 [2022-07-13 21:58:22,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand