./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:49:40,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:49:40,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:49:40,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:49:40,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:49:40,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:49:40,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:49:40,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:49:40,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:49:40,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:49:40,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:49:40,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:49:40,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:49:40,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:49:40,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:49:40,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:49:40,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:49:40,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:49:40,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:49:40,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:49:40,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:49:40,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:49:40,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:49:40,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:49:40,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:49:40,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:49:40,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:49:40,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:49:40,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:49:40,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:49:40,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:49:40,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:49:40,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:49:40,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:49:40,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:49:40,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:49:40,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:49:40,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:49:40,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:49:40,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:49:40,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:49:40,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:49:40,538 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:49:40,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:49:40,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:49:40,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:49:40,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:49:40,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:49:40,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:49:40,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:49:40,542 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:49:40,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:49:40,543 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:49:40,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:49:40,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:49:40,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:49:40,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:49:40,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:49:40,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:49:40,544 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:49:40,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:49:40,544 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:49:40,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:49:40,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:49:40,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:49:40,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:49:40,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:49:40,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:49:40,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:49:40,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:49:40,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:49:40,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:49:40,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:49:40,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:49:40,548 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:49:40,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:49:40,548 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:49:40,548 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:49:40,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:49:40,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:49:40,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:49:40,881 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:49:40,881 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:49:40,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 17:49:42,027 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:49:42,249 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:49:42,249 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 17:49:42,261 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e09d1a37/1553471f7ee447f897458f31218e766b/FLAGa729c2af1 [2023-08-30 17:49:42,274 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e09d1a37/1553471f7ee447f897458f31218e766b [2023-08-30 17:49:42,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:49:42,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:49:42,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:49:42,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:49:42,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:49:42,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26616d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42, skipping insertion in model container [2023-08-30 17:49:42,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:49:42,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:49:42,566 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-08-30 17:49:42,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:49:42,608 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:49:42,662 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-08-30 17:49:42,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:49:42,701 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 17:49:42,707 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:49:42,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42 WrapperNode [2023-08-30 17:49:42,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:49:42,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:49:42,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:49:42,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:49:42,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,770 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-08-30 17:49:42,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:49:42,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:49:42,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:49:42,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:49:42,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:49:42,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:49:42,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:49:42,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:49:42,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (1/1) ... [2023-08-30 17:49:42,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:49:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:42,857 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) [2023-08-30 17:49:42,862 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 [2023-08-30 17:49:42,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:49:42,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:49:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:49:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:49:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:49:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:49:42,888 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:49:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:49:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:49:42,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:49:42,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:49:42,890 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:49:43,060 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:49:43,066 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:49:43,272 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:49:43,279 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:49:43,279 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 17:49:43,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:49:43 BoogieIcfgContainer [2023-08-30 17:49:43,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:49:43,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:49:43,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:49:43,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:49:43,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:49:42" (1/3) ... [2023-08-30 17:49:43,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b729b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:49:43, skipping insertion in model container [2023-08-30 17:49:43,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:42" (2/3) ... [2023-08-30 17:49:43,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b729b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:49:43, skipping insertion in model container [2023-08-30 17:49:43,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:49:43" (3/3) ... [2023-08-30 17:49:43,287 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-30 17:49:43,294 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:49:43,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:49:43,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:49:43,301 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:49:43,369 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:49:43,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 135 transitions, 278 flow [2023-08-30 17:49:43,458 INFO L130 PetriNetUnfolder]: 26/205 cut-off events. [2023-08-30 17:49:43,459 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:49:43,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 205 events. 26/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 529 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-30 17:49:43,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 135 transitions, 278 flow [2023-08-30 17:49:43,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:43,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:43,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:43,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:43,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:43,512 INFO L130 PetriNetUnfolder]: 25/200 cut-off events. [2023-08-30 17:49:43,512 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:43,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 200 events. 25/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 492 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-30 17:49:43,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 3040 [2023-08-30 17:49:46,545 INFO L134 LiptonReduction]: Checked pairs total: 4311 [2023-08-30 17:49:46,545 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-30 17:49:46,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:46,563 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:46,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 17:49:46,568 INFO L130 PetriNetUnfolder]: 8/29 cut-off events. [2023-08-30 17:49:46,568 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:46,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:46,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 17:49:46,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:46,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2099220035, now seen corresponding path program 1 times [2023-08-30 17:49:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:46,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660381727] [2023-08-30 17:49:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:46,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:46,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:46,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660381727] [2023-08-30 17:49:46,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660381727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:46,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:46,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:49:46,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094437085] [2023-08-30 17:49:46,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:46,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:46,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 254 [2023-08-30 17:49:46,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2023-08-30 17:49:46,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:46,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 254 [2023-08-30 17:49:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:47,034 INFO L130 PetriNetUnfolder]: 88/207 cut-off events. [2023-08-30 17:49:47,034 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:47,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 207 events. 88/207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 731 event pairs, 32 based on Foata normal form. 29/194 useless extension candidates. Maximal degree in co-relation 356. Up to 122 conditions per place. [2023-08-30 17:49:47,040 INFO L137 encePairwiseOnDemand]: 241/254 looper letters, 20 selfloop transitions, 2 changer transitions 8/32 dead transitions. [2023-08-30 17:49:47,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 127 flow [2023-08-30 17:49:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-30 17:49:47,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520997375328084 [2023-08-30 17:49:47,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-30 17:49:47,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-30 17:49:47,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:47,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-30 17:49:47,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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) [2023-08-30 17:49:47,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 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) [2023-08-30 17:49:47,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 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) [2023-08-30 17:49:47,072 INFO L175 Difference]: Start difference. First operand has 26 places, 34 transitions, 73 flow. Second operand 3 states and 397 transitions. [2023-08-30 17:49:47,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 127 flow [2023-08-30 17:49:47,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:47,075 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 53 flow [2023-08-30 17:49:47,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-30 17:49:47,080 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-30 17:49:47,080 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 53 flow [2023-08-30 17:49:47,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2023-08-30 17:49:47,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:47,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:47,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:49:47,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:47,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash -818669102, now seen corresponding path program 1 times [2023-08-30 17:49:47,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:47,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266913470] [2023-08-30 17:49:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266913470] [2023-08-30 17:49:47,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266913470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:47,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527074154] [2023-08-30 17:49:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:47,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:47,157 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) [2023-08-30 17:49:47,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:49:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:47,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527074154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:47,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:47,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40697766] [2023-08-30 17:49:47,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:47,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:47,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:47,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 254 [2023-08-30 17:49:47,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 53 flow. Second operand has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 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) [2023-08-30 17:49:47,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:47,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 254 [2023-08-30 17:49:47,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:47,399 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 17:49:47,399 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:47,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 21. Up to 6 conditions per place. [2023-08-30 17:49:47,400 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-30 17:49:47,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 36 flow [2023-08-30 17:49:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:49:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:49:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-30 17:49:47,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46161417322834647 [2023-08-30 17:49:47,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-30 17:49:47,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-30 17:49:47,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:47,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-30 17:49:47,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2023-08-30 17:49:47,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 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) [2023-08-30 17:49:47,407 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 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) [2023-08-30 17:49:47,407 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 53 flow. Second operand 4 states and 469 transitions. [2023-08-30 17:49:47,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 36 flow [2023-08-30 17:49:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:49:47,407 INFO L231 Difference]: Finished difference. Result has 13 places, 0 transitions, 0 flow [2023-08-30 17:49:47,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=13, PETRI_TRANSITIONS=0} [2023-08-30 17:49:47,408 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -13 predicate places. [2023-08-30 17:49:47,408 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 0 transitions, 0 flow [2023-08-30 17:49:47,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 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) [2023-08-30 17:49:47,411 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 17:49:47,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 17:49:47,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:49:47,629 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 [2023-08-30 17:49:47,629 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:47,631 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 17:49:47,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 135 transitions, 278 flow [2023-08-30 17:49:47,656 INFO L130 PetriNetUnfolder]: 26/205 cut-off events. [2023-08-30 17:49:47,656 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:49:47,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 205 events. 26/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 529 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-30 17:49:47,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 135 transitions, 278 flow [2023-08-30 17:49:47,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:47,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:47,658 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:47,658 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:47,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 265 flow [2023-08-30 17:49:47,672 INFO L130 PetriNetUnfolder]: 25/200 cut-off events. [2023-08-30 17:49:47,672 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:47,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 200 events. 25/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 492 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-30 17:49:47,674 INFO L119 LiptonReduction]: Number of co-enabled transitions 3040 [2023-08-30 17:49:50,529 INFO L134 LiptonReduction]: Checked pairs total: 4336 [2023-08-30 17:49:50,529 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-30 17:49:50,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:50,532 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:50,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:50,536 INFO L130 PetriNetUnfolder]: 9/33 cut-off events. [2023-08-30 17:49:50,536 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:50,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:50,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:49:50,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:50,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1349788018, now seen corresponding path program 1 times [2023-08-30 17:49:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117496672] [2023-08-30 17:49:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:50,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:50,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:50,594 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:50,594 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:50,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:49:50,595 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:50,595 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:50,596 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:50,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:49:50,610 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:49:50,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:50,648 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-08-30 17:49:50,648 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:50,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-08-30 17:49:50,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:50,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:50,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:50,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:50,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:50,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:50,676 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-08-30 17:49:50,677 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:50,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-08-30 17:49:50,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 7320 [2023-08-30 17:49:53,497 INFO L134 LiptonReduction]: Checked pairs total: 11823 [2023-08-30 17:49:53,497 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-30 17:49:53,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:53,500 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:53,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 17:49:53,503 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 17:49:53,503 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:49:53,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:53,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 17:49:53,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:53,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2076059207, now seen corresponding path program 1 times [2023-08-30 17:49:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087825399] [2023-08-30 17:49:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:53,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:53,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087825399] [2023-08-30 17:49:53,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087825399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:53,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:53,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:49:53,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39472273] [2023-08-30 17:49:53,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:53,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:53,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:53,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:53,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:53,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 293 [2023-08-30 17:49:53,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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) [2023-08-30 17:49:53,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:53,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 293 [2023-08-30 17:49:53,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:53,823 INFO L130 PetriNetUnfolder]: 1755/2921 cut-off events. [2023-08-30 17:49:53,823 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 17:49:53,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5818 conditions, 2921 events. 1755/2921 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14392 event pairs, 731 based on Foata normal form. 100/2494 useless extension candidates. Maximal degree in co-relation 2292. Up to 1793 conditions per place. [2023-08-30 17:49:53,834 INFO L137 encePairwiseOnDemand]: 279/293 looper letters, 45 selfloop transitions, 2 changer transitions 7/57 dead transitions. [2023-08-30 17:49:53,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 244 flow [2023-08-30 17:49:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-30 17:49:53,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534698521046644 [2023-08-30 17:49:53,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-30 17:49:53,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-30 17:49:53,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:53,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-30 17:49:53,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-08-30 17:49:53,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2023-08-30 17:49:53,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2023-08-30 17:49:53,841 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 112 flow. Second operand 3 states and 470 transitions. [2023-08-30 17:49:53,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 244 flow [2023-08-30 17:49:53,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:53,843 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 100 flow [2023-08-30 17:49:53,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 17:49:53,844 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-30 17:49:53,844 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 100 flow [2023-08-30 17:49:53,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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) [2023-08-30 17:49:53,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:53,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:53,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:49:53,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:53,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:53,846 INFO L85 PathProgramCache]: Analyzing trace with hash -976056897, now seen corresponding path program 1 times [2023-08-30 17:49:53,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:53,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999853568] [2023-08-30 17:49:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:53,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:53,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:53,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999853568] [2023-08-30 17:49:53,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999853568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:53,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495616614] [2023-08-30 17:49:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:53,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:53,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:53,895 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) [2023-08-30 17:49:53,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:49:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:54,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:54,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:54,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:54,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495616614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:54,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:54,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:54,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884236123] [2023-08-30 17:49:54,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:54,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:54,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:54,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:54,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 293 [2023-08-30 17:49:54,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 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) [2023-08-30 17:49:54,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:54,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 293 [2023-08-30 17:49:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:54,133 INFO L130 PetriNetUnfolder]: 160/295 cut-off events. [2023-08-30 17:49:54,133 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:54,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 295 events. 160/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1009 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 601. Up to 192 conditions per place. [2023-08-30 17:49:54,134 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-30 17:49:54,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 145 flow [2023-08-30 17:49:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:49:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:49:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 691 transitions. [2023-08-30 17:49:54,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47167235494880544 [2023-08-30 17:49:54,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 691 transitions. [2023-08-30 17:49:54,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 691 transitions. [2023-08-30 17:49:54,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:54,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 691 transitions. [2023-08-30 17:49:54,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 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) [2023-08-30 17:49:54,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 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) [2023-08-30 17:49:54,144 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 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) [2023-08-30 17:49:54,144 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 100 flow. Second operand 5 states and 691 transitions. [2023-08-30 17:49:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 145 flow [2023-08-30 17:49:54,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 143 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:49:54,146 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-30 17:49:54,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-30 17:49:54,151 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -12 predicate places. [2023-08-30 17:49:54,151 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-30 17:49:54,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 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) [2023-08-30 17:49:54,152 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 17:49:54,152 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 17:49:54,152 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 17:49:54,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:49:54,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:54,358 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:54,359 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 17:49:54,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:54,385 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-08-30 17:49:54,385 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:54,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-08-30 17:49:54,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:54,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:54,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:54,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:54,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:54,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-30 17:49:54,410 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-08-30 17:49:54,411 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:54,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-08-30 17:49:54,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 7320 [2023-08-30 17:49:57,197 INFO L134 LiptonReduction]: Checked pairs total: 11801 [2023-08-30 17:49:57,197 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-30 17:49:57,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:57,205 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:57,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:57,210 INFO L130 PetriNetUnfolder]: 21/70 cut-off events. [2023-08-30 17:49:57,210 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:49:57,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:57,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:49:57,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:57,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1450321760, now seen corresponding path program 1 times [2023-08-30 17:49:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:57,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466742766] [2023-08-30 17:49:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:57,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:57,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:57,237 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:57,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:57,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:49:57,238 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:57,238 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:57,238 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:57,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:49:57,252 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:49:57,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-08-30 17:49:57,285 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-08-30 17:49:57,285 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:57,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-30 17:49:57,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 179 transitions, 388 flow [2023-08-30 17:49:57,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 179 transitions, 388 flow [2023-08-30 17:49:57,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:57,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 179 transitions, 388 flow [2023-08-30 17:49:57,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 179 transitions, 388 flow [2023-08-30 17:49:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-08-30 17:49:57,323 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-08-30 17:49:57,324 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:57,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-30 17:49:57,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 12360 [2023-08-30 17:50:00,191 INFO L134 LiptonReduction]: Checked pairs total: 20769 [2023-08-30 17:50:00,191 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-30 17:50:00,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:50:00,193 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:00,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:50:00,196 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 17:50:00,196 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:50:00,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:00,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 17:50:00,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:50:00,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -516115398, now seen corresponding path program 1 times [2023-08-30 17:50:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:00,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810007861] [2023-08-30 17:50:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810007861] [2023-08-30 17:50:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810007861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:50:00,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:50:00,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:50:00,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791468881] [2023-08-30 17:50:00,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:50:00,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:50:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:50:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:50:00,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 335 [2023-08-30 17:50:00,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2023-08-30 17:50:00,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:00,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 335 [2023-08-30 17:50:00,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:01,942 INFO L130 PetriNetUnfolder]: 15543/22663 cut-off events. [2023-08-30 17:50:01,942 INFO L131 PetriNetUnfolder]: For 723/723 co-relation queries the response was YES. [2023-08-30 17:50:01,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45250 conditions, 22663 events. 15543/22663 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 138273 event pairs, 6456 based on Foata normal form. 1640/20474 useless extension candidates. Maximal degree in co-relation 5826. Up to 14692 conditions per place. [2023-08-30 17:50:02,052 INFO L137 encePairwiseOnDemand]: 317/335 looper letters, 56 selfloop transitions, 2 changer transitions 8/70 dead transitions. [2023-08-30 17:50:02,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 309 flow [2023-08-30 17:50:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:50:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:50:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-30 17:50:02,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343283582089552 [2023-08-30 17:50:02,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-30 17:50:02,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-30 17:50:02,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:02,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-30 17:50:02,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2023-08-30 17:50:02,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 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) [2023-08-30 17:50:02,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 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) [2023-08-30 17:50:02,061 INFO L175 Difference]: Start difference. First operand has 48 places, 59 transitions, 148 flow. Second operand 3 states and 537 transitions. [2023-08-30 17:50:02,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 309 flow [2023-08-30 17:50:02,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:50:02,066 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 128 flow [2023-08-30 17:50:02,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-30 17:50:02,067 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-30 17:50:02,067 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 128 flow [2023-08-30 17:50:02,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2023-08-30 17:50:02,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:02,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:02,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:50:02,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:50:02,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash -144566504, now seen corresponding path program 1 times [2023-08-30 17:50:02,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:02,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047745764] [2023-08-30 17:50:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047745764] [2023-08-30 17:50:02,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047745764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484649520] [2023-08-30 17:50:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:02,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:02,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:02,192 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) [2023-08-30 17:50:02,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:50:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:50:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:02,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484649520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:02,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:50:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292506788] [2023-08-30 17:50:02,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:50:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:50:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:50:02,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 335 [2023-08-30 17:50:02,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 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) [2023-08-30 17:50:02,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:02,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 335 [2023-08-30 17:50:02,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:02,471 INFO L130 PetriNetUnfolder]: 1312/1996 cut-off events. [2023-08-30 17:50:02,471 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-30 17:50:02,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4100 conditions, 1996 events. 1312/1996 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9038 event pairs, 0 based on Foata normal form. 0/1996 useless extension candidates. Maximal degree in co-relation 4090. Up to 1248 conditions per place. [2023-08-30 17:50:02,476 INFO L137 encePairwiseOnDemand]: 332/335 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-30 17:50:02,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 230 flow [2023-08-30 17:50:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:50:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:50:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-08-30 17:50:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 17:50:02,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-08-30 17:50:02,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-08-30 17:50:02,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-08-30 17:50:02,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 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) [2023-08-30 17:50:02,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 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) [2023-08-30 17:50:02,485 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 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) [2023-08-30 17:50:02,485 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 128 flow. Second operand 6 states and 938 transitions. [2023-08-30 17:50:02,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 230 flow [2023-08-30 17:50:02,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 54 transitions, 226 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 17:50:02,486 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-30 17:50:02,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-30 17:50:02,487 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -13 predicate places. [2023-08-30 17:50:02,487 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-30 17:50:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 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) [2023-08-30 17:50:02,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:50:02,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:50:02,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:50:02,489 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:50:02,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 17:50:02,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:02,693 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:50:02,694 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:50:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-08-30 17:50:02,725 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-08-30 17:50:02,726 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:50:02,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-30 17:50:02,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 179 transitions, 388 flow [2023-08-30 17:50:02,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 179 transitions, 388 flow [2023-08-30 17:50:02,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:02,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 179 transitions, 388 flow [2023-08-30 17:50:02,730 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 179 transitions, 388 flow [2023-08-30 17:50:02,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-08-30 17:50:02,792 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-08-30 17:50:02,792 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:50:02,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-30 17:50:02,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 12360 [2023-08-30 17:50:05,661 INFO L134 LiptonReduction]: Checked pairs total: 20560 [2023-08-30 17:50:05,662 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-30 17:50:05,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:50:05,672 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:05,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:50:05,680 INFO L130 PetriNetUnfolder]: 34/110 cut-off events. [2023-08-30 17:50:05,680 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:50:05,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:05,680 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:50:05,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:50:05,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash -587212680, now seen corresponding path program 1 times [2023-08-30 17:50:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:05,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933130760] [2023-08-30 17:50:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:05,702 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:50:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:05,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:50:05,724 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:50:05,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:50:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:50:05,724 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:50:05,726 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:50:05,726 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:50:05,726 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:50:05,752 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:50:05,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:05,821 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-08-30 17:50:05,822 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:05,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-30 17:50:05,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:05,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:05,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:05,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:05,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:05,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:05,897 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-08-30 17:50:05,897 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:05,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-30 17:50:05,913 INFO L119 LiptonReduction]: Number of co-enabled transitions 18320 [2023-08-30 17:50:08,802 INFO L134 LiptonReduction]: Checked pairs total: 33546 [2023-08-30 17:50:08,802 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-30 17:50:08,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:50:08,804 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:08,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 17:50:08,807 INFO L130 PetriNetUnfolder]: 8/31 cut-off events. [2023-08-30 17:50:08,807 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:50:08,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:08,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 17:50:08,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:50:08,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1548497885, now seen corresponding path program 1 times [2023-08-30 17:50:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452638783] [2023-08-30 17:50:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:08,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452638783] [2023-08-30 17:50:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452638783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:50:08,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:50:08,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:50:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412100657] [2023-08-30 17:50:08,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:50:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:50:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:50:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:50:08,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 370 [2023-08-30 17:50:08,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 73 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 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) [2023-08-30 17:50:08,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:08,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 370 [2023-08-30 17:50:08,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:20,500 INFO L130 PetriNetUnfolder]: 147280/204085 cut-off events. [2023-08-30 17:50:20,501 INFO L131 PetriNetUnfolder]: For 7982/7982 co-relation queries the response was YES. [2023-08-30 17:50:20,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405224 conditions, 204085 events. 147280/204085 cut-off events. For 7982/7982 co-relation queries the response was YES. Maximal size of possible extension queue 5912. Compared 1490393 event pairs, 66377 based on Foata normal form. 27679/191825 useless extension candidates. Maximal degree in co-relation 52838. Up to 129201 conditions per place. [2023-08-30 17:50:21,702 INFO L137 encePairwiseOnDemand]: 343/370 looper letters, 78 selfloop transitions, 4 changer transitions 1/89 dead transitions. [2023-08-30 17:50:21,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 398 flow [2023-08-30 17:50:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:50:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:50:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-30 17:50:21,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554954954954955 [2023-08-30 17:50:21,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-30 17:50:21,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-30 17:50:21,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:21,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-30 17:50:21,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 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) [2023-08-30 17:50:21,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 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) [2023-08-30 17:50:21,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 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) [2023-08-30 17:50:21,718 INFO L175 Difference]: Start difference. First operand has 59 places, 73 transitions, 190 flow. Second operand 3 states and 616 transitions. [2023-08-30 17:50:21,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 398 flow [2023-08-30 17:50:21,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:50:21,724 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 184 flow [2023-08-30 17:50:21,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-30 17:50:21,725 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-30 17:50:21,725 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 184 flow [2023-08-30 17:50:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 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) [2023-08-30 17:50:21,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:21,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:21,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:50:21,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:50:21,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash -481608267, now seen corresponding path program 1 times [2023-08-30 17:50:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:21,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506201704] [2023-08-30 17:50:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:21,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506201704] [2023-08-30 17:50:21,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506201704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880573223] [2023-08-30 17:50:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:21,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:21,767 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) [2023-08-30 17:50:21,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:50:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:50:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:21,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880573223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:21,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:21,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:50:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294211176] [2023-08-30 17:50:21,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:21,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:50:21,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:50:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:50:21,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 370 [2023-08-30 17:50:21,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 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) [2023-08-30 17:50:21,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:21,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 370 [2023-08-30 17:50:21,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:32,362 INFO L130 PetriNetUnfolder]: 135700/187771 cut-off events. [2023-08-30 17:50:32,362 INFO L131 PetriNetUnfolder]: For 31626/31626 co-relation queries the response was YES. [2023-08-30 17:50:32,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414225 conditions, 187771 events. 135700/187771 cut-off events. For 31626/31626 co-relation queries the response was YES. Maximal size of possible extension queue 5518. Compared 1369643 event pairs, 27752 based on Foata normal form. 0/167626 useless extension candidates. Maximal degree in co-relation 83876. Up to 173317 conditions per place. [2023-08-30 17:50:33,283 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 97 selfloop transitions, 5 changer transitions 1/109 dead transitions. [2023-08-30 17:50:33,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 498 flow [2023-08-30 17:50:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:50:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:50:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1082 transitions. [2023-08-30 17:50:33,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873873873873874 [2023-08-30 17:50:33,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1082 transitions. [2023-08-30 17:50:33,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1082 transitions. [2023-08-30 17:50:33,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:33,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1082 transitions. [2023-08-30 17:50:33,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 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) [2023-08-30 17:50:33,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 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) [2023-08-30 17:50:33,294 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 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) [2023-08-30 17:50:33,294 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 184 flow. Second operand 6 states and 1082 transitions. [2023-08-30 17:50:33,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 498 flow [2023-08-30 17:50:33,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 109 transitions, 488 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:50:33,375 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 210 flow [2023-08-30 17:50:33,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-30 17:50:33,376 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-30 17:50:33,376 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 210 flow [2023-08-30 17:50:33,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 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) [2023-08-30 17:50:33,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:33,377 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:33,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 17:50:33,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:33,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:50:33,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -100263553, now seen corresponding path program 1 times [2023-08-30 17:50:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132943911] [2023-08-30 17:50:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:33,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132943911] [2023-08-30 17:50:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132943911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968452119] [2023-08-30 17:50:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:33,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:33,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:33,677 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) [2023-08-30 17:50:33,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:50:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:50:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:33,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968452119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:33,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:33,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:50:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236041997] [2023-08-30 17:50:33,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:50:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:50:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:50:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 370 [2023-08-30 17:50:33,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 166.23076923076923) internal successors, (2161), 13 states have internal predecessors, (2161), 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) [2023-08-30 17:50:33,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:33,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 370 [2023-08-30 17:50:33,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:34,591 INFO L130 PetriNetUnfolder]: 5152/7555 cut-off events. [2023-08-30 17:50:34,592 INFO L131 PetriNetUnfolder]: For 6324/6324 co-relation queries the response was YES. [2023-08-30 17:50:34,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17929 conditions, 7555 events. 5152/7555 cut-off events. For 6324/6324 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 41076 event pairs, 0 based on Foata normal form. 720/8274 useless extension candidates. Maximal degree in co-relation 8744. Up to 3444 conditions per place. [2023-08-30 17:50:34,611 INFO L137 encePairwiseOnDemand]: 367/370 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-30 17:50:34,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 367 flow [2023-08-30 17:50:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:50:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:50:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-08-30 17:50:34,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46988416988416987 [2023-08-30 17:50:34,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-08-30 17:50:34,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-08-30 17:50:34,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:34,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-08-30 17:50:34,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 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) [2023-08-30 17:50:34,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 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) [2023-08-30 17:50:34,622 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 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) [2023-08-30 17:50:34,623 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 210 flow. Second operand 7 states and 1217 transitions. [2023-08-30 17:50:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 367 flow [2023-08-30 17:50:34,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 342 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-30 17:50:34,636 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-30 17:50:34,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-30 17:50:34,637 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -13 predicate places. [2023-08-30 17:50:34,637 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-30 17:50:34,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 166.23076923076923) internal successors, (2161), 13 states have internal predecessors, (2161), 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) [2023-08-30 17:50:34,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 17:50:34,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 17:50:34,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 17:50:34,639 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 17:50:34,639 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 17:50:34,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 17:50:34,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 17:50:34,845 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:50:34,845 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:50:34,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:34,894 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-08-30 17:50:34,894 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-30 17:50:34,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:34,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:34,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:34,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:34,901 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:34,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-08-30 17:50:34,943 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-08-30 17:50:34,943 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:34,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-30 17:50:34,954 INFO L119 LiptonReduction]: Number of co-enabled transitions 18320 [2023-08-30 17:50:37,797 INFO L134 LiptonReduction]: Checked pairs total: 33390 [2023-08-30 17:50:37,798 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-30 17:50:37,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:50:37,799 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:37,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:50:37,805 INFO L130 PetriNetUnfolder]: 44/148 cut-off events. [2023-08-30 17:50:37,805 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:50:37,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:37,806 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:37,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:50:37,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:37,806 INFO L85 PathProgramCache]: Analyzing trace with hash -567908754, now seen corresponding path program 1 times [2023-08-30 17:50:37,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:37,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885841390] [2023-08-30 17:50:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:37,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:37,821 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:50:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:37,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:50:37,832 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:50:37,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:50:37,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 17:50:37,832 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:50:37,833 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:50:37,833 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:50:37,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:50:37,850 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:50:37,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 506 flow [2023-08-30 17:50:37,948 INFO L130 PetriNetUnfolder]: 161/1022 cut-off events. [2023-08-30 17:50:37,949 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:50:37,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 1022 events. 161/1022 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4919 event pairs, 23 based on Foata normal form. 0/872 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-08-30 17:50:37,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 223 transitions, 506 flow [2023-08-30 17:50:37,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 223 transitions, 506 flow [2023-08-30 17:50:37,965 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:37,965 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 223 transitions, 506 flow [2023-08-30 17:50:37,966 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 223 transitions, 506 flow [2023-08-30 17:50:37,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 506 flow [2023-08-30 17:50:38,095 INFO L130 PetriNetUnfolder]: 161/1022 cut-off events. [2023-08-30 17:50:38,096 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:50:38,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 1022 events. 161/1022 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4919 event pairs, 23 based on Foata normal form. 0/872 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-08-30 17:50:38,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 25200 [2023-08-30 17:50:41,010 INFO L134 LiptonReduction]: Checked pairs total: 46301 [2023-08-30 17:50:41,010 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-30 17:50:41,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:50:41,011 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a17ca5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:41,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 17:50:41,013 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 17:50:41,013 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:50:41,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:41,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 17:50:41,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 17:50:41,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash -798777953, now seen corresponding path program 1 times [2023-08-30 17:50:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963389093] [2023-08-30 17:50:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:41,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:41,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963389093] [2023-08-30 17:50:41,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963389093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:50:41,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:50:41,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:50:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611839347] [2023-08-30 17:50:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:50:41,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:50:41,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:50:41,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:50:41,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 415 [2023-08-30 17:50:41,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-08-30 17:50:41,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:41,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 415 [2023-08-30 17:50:41,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand