./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c --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/weaver/mult-dist.wvr.c -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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --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 19:25:57,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:25:57,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:25:57,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:25:57,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:25:57,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:25:57,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:25:57,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:25:57,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:25:57,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:25:57,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:25:57,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:25:57,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:25:57,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:25:57,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:25:57,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:25:57,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:25:57,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:25:57,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:25:57,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:25:57,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:25:57,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:25:57,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:25:57,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:25:57,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:25:57,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:25:57,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:25:57,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:25:57,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:25:57,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:25:57,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:25:57,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:25:57,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:25:57,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:25:57,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:25:57,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:25:57,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:25:57,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:25:57,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:25:57,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:25:57,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:25:57,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:25:57,648 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:25:57,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:25:57,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:25:57,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:25:57,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:25:57,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:25:57,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:25:57,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:25:57,652 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:25:57,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:25:57,653 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:25:57,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:25:57,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:25:57,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:25:57,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:25:57,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:25:57,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:25:57,654 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:25:57,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:25:57,655 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:25:57,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:25:57,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:25:57,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:25:57,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:25:57,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:25:57,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:25:57,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:25:57,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:25:57,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:25:57,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:25:57,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:25:57,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:25:57,667 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:25:57,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:25:57,668 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:25:57,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:25:57,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:25:57,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:25:57,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:25:57,957 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:25:57,957 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:25:57,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2023-08-30 19:25:59,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:25:59,223 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:25:59,223 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2023-08-30 19:25:59,228 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a003a93a9/7d0093281aec4eafa4efb35184a3464c/FLAG95eeb9535 [2023-08-30 19:25:59,244 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a003a93a9/7d0093281aec4eafa4efb35184a3464c [2023-08-30 19:25:59,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:25:59,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:25:59,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:25:59,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:25:59,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:25:59,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2001efdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59, skipping insertion in model container [2023-08-30 19:25:59,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:25:59,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:25:59,393 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2116,2129] [2023-08-30 19:25:59,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:25:59,405 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:25:59,423 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2116,2129] [2023-08-30 19:25:59,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:25:59,437 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:25:59,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59 WrapperNode [2023-08-30 19:25:59,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:25:59,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:25:59,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:25:59,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:25:59,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,477 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-08-30 19:25:59,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:25:59,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:25:59,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:25:59,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:25:59,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,515 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:25:59,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:25:59,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:25:59,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:25:59,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (1/1) ... [2023-08-30 19:25:59,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:25:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:59,558 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 19:25:59,583 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 19:25:59,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:25:59,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:25:59,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:25:59,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:25:59,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:25:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:25:59,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:25:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:25:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:25:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:25:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:25:59,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:25:59,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:25:59,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:25:59,604 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 19:25:59,712 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:25:59,714 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:25:59,974 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:25:59,980 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:25:59,980 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:25:59,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:25:59 BoogieIcfgContainer [2023-08-30 19:25:59,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:25:59,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:25:59,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:25:59,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:25:59,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:25:59" (1/3) ... [2023-08-30 19:25:59,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1088e7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:25:59, skipping insertion in model container [2023-08-30 19:25:59,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:59" (2/3) ... [2023-08-30 19:25:59,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1088e7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:25:59, skipping insertion in model container [2023-08-30 19:25:59,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:25:59" (3/3) ... [2023-08-30 19:25:59,989 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-08-30 19:25:59,995 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:26:00,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:26:00,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:26:00,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:26:00,086 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:26:00,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2023-08-30 19:26:00,169 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-08-30 19:26:00,169 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:26:00,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 19:26:00,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2023-08-30 19:26:00,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 202 flow [2023-08-30 19:26:00,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:26:00,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 202 flow [2023-08-30 19:26:00,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 202 flow [2023-08-30 19:26:00,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 202 flow [2023-08-30 19:26:00,236 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-08-30 19:26:00,236 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:26:00,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 7/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 19:26:00,240 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-30 19:26:02,730 INFO L134 LiptonReduction]: Checked pairs total: 1314 [2023-08-30 19:26:02,731 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-30 19:26:02,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:26:02,748 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;@17d5d3f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:26:02,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:26:02,754 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-30 19:26:02,755 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:26:02,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:02,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:02,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:26:02,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1681500982, now seen corresponding path program 1 times [2023-08-30 19:26:02,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:02,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902530507] [2023-08-30 19:26:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:02,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:03,407 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 19:26:03,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902530507] [2023-08-30 19:26:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902530507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:26:03,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:26:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 19:26:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137746159] [2023-08-30 19:26:03,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:26:03,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:26:03,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:26:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:26:03,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 183 [2023-08-30 19:26:03,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 19:26:03,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:03,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 183 [2023-08-30 19:26:03,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:03,596 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2023-08-30 19:26:03,596 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 19:26:03,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1611 event pairs, 39 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-30 19:26:03,604 INFO L137 encePairwiseOnDemand]: 178/183 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-08-30 19:26:03,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-08-30 19:26:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:26:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:26:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-30 19:26:03,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628415300546448 [2023-08-30 19:26:03,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-30 19:26:03,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-30 19:26:03,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:03,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-30 19:26:03,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 19:26:03,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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 19:26:03,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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 19:26:03,654 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 309 transitions. [2023-08-30 19:26:03,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-08-30 19:26:03,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:26:03,659 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-08-30 19:26:03,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-30 19:26:03,663 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-08-30 19:26:03,663 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-08-30 19:26:03,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 19:26:03,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:03,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:03,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:26:03,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:26:03,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash -296399337, now seen corresponding path program 1 times [2023-08-30 19:26:03,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:03,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334162280] [2023-08-30 19:26:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:03,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:03,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:03,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334162280] [2023-08-30 19:26:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334162280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:26:03,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:26:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:26:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356819738] [2023-08-30 19:26:03,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:26:03,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:26:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:26:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:26:04,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 183 [2023-08-30 19:26:04,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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 19:26:04,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:04,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 183 [2023-08-30 19:26:04,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:04,322 INFO L130 PetriNetUnfolder]: 596/906 cut-off events. [2023-08-30 19:26:04,322 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-30 19:26:04,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 906 events. 596/906 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3355 event pairs, 166 based on Foata normal form. 6/912 useless extension candidates. Maximal degree in co-relation 616. Up to 420 conditions per place. [2023-08-30 19:26:04,329 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 69 selfloop transitions, 8 changer transitions 8/85 dead transitions. [2023-08-30 19:26:04,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 85 transitions, 416 flow [2023-08-30 19:26:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:26:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:26:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 638 transitions. [2023-08-30 19:26:04,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49804839968774395 [2023-08-30 19:26:04,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 638 transitions. [2023-08-30 19:26:04,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 638 transitions. [2023-08-30 19:26:04,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:04,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 638 transitions. [2023-08-30 19:26:04,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.14285714285714) internal successors, (638), 7 states have internal predecessors, (638), 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 19:26:04,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:26:04,347 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:26:04,347 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 7 states and 638 transitions. [2023-08-30 19:26:04,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 85 transitions, 416 flow [2023-08-30 19:26:04,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 85 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:26:04,352 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 139 flow [2023-08-30 19:26:04,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 19:26:04,353 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-30 19:26:04,353 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 139 flow [2023-08-30 19:26:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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 19:26:04,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:04,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:04,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:26:04,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:26:04,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:04,357 INFO L85 PathProgramCache]: Analyzing trace with hash -748397025, now seen corresponding path program 2 times [2023-08-30 19:26:04,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:04,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235464279] [2023-08-30 19:26:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:04,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:04,625 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 19:26:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:04,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235464279] [2023-08-30 19:26:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235464279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:04,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756849568] [2023-08-30 19:26:04,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:26:04,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:04,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:26:04,633 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 19:26:04,674 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 19:26:04,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:26:04,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:26:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:26:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:26:05,018 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 19:26:05,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:26:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:05,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756849568] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:05,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:26:05,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-08-30 19:26:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161585017] [2023-08-30 19:26:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:26:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:26:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:26:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:26:05,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-30 19:26:05,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:26:05,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:05,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-30 19:26:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:05,594 INFO L130 PetriNetUnfolder]: 832/1268 cut-off events. [2023-08-30 19:26:05,595 INFO L131 PetriNetUnfolder]: For 1476/1531 co-relation queries the response was YES. [2023-08-30 19:26:05,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 1268 events. 832/1268 cut-off events. For 1476/1531 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5353 event pairs, 172 based on Foata normal form. 6/1272 useless extension candidates. Maximal degree in co-relation 1710. Up to 409 conditions per place. [2023-08-30 19:26:05,603 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 99 selfloop transitions, 17 changer transitions 1/118 dead transitions. [2023-08-30 19:26:05,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 118 transitions, 705 flow [2023-08-30 19:26:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:26:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:26:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2023-08-30 19:26:05,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519808743169399 [2023-08-30 19:26:05,607 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 761 transitions. [2023-08-30 19:26:05,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 761 transitions. [2023-08-30 19:26:05,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:05,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 761 transitions. [2023-08-30 19:26:05,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 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 19:26:05,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 183.0) internal successors, (1647), 9 states have internal predecessors, (1647), 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 19:26:05,612 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 183.0) internal successors, (1647), 9 states have internal predecessors, (1647), 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 19:26:05,613 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 139 flow. Second operand 8 states and 761 transitions. [2023-08-30 19:26:05,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 118 transitions, 705 flow [2023-08-30 19:26:05,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 118 transitions, 675 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 19:26:05,618 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 294 flow [2023-08-30 19:26:05,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-30 19:26:05,619 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-08-30 19:26:05,619 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 294 flow [2023-08-30 19:26:05,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:26:05,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:05,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:05,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:26:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:05,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:26:05,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1550280123, now seen corresponding path program 3 times [2023-08-30 19:26:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:05,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098230713] [2023-08-30 19:26:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:26:06,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098230713] [2023-08-30 19:26:06,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098230713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:26:06,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:26:06,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:26:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936316389] [2023-08-30 19:26:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:26:06,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:26:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:26:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:26:06,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 183 [2023-08-30 19:26:06,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 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 19:26:06,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:06,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 183 [2023-08-30 19:26:06,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:06,449 INFO L130 PetriNetUnfolder]: 1203/1834 cut-off events. [2023-08-30 19:26:06,450 INFO L131 PetriNetUnfolder]: For 5174/5174 co-relation queries the response was YES. [2023-08-30 19:26:06,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7019 conditions, 1834 events. 1203/1834 cut-off events. For 5174/5174 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8187 event pairs, 336 based on Foata normal form. 12/1846 useless extension candidates. Maximal degree in co-relation 5374. Up to 928 conditions per place. [2023-08-30 19:26:06,463 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 108 selfloop transitions, 29 changer transitions 18/155 dead transitions. [2023-08-30 19:26:06,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 155 transitions, 1178 flow [2023-08-30 19:26:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:26:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:26:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 900 transitions. [2023-08-30 19:26:06,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918032786885246 [2023-08-30 19:26:06,466 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 900 transitions. [2023-08-30 19:26:06,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 900 transitions. [2023-08-30 19:26:06,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:26:06,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 900 transitions. [2023-08-30 19:26:06,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 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 19:26:06,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 183.0) internal successors, (2013), 11 states have internal predecessors, (2013), 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 19:26:06,472 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 183.0) internal successors, (2013), 11 states have internal predecessors, (2013), 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 19:26:06,473 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 294 flow. Second operand 10 states and 900 transitions. [2023-08-30 19:26:06,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 155 transitions, 1178 flow [2023-08-30 19:26:06,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 155 transitions, 1174 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 19:26:06,486 INFO L231 Difference]: Finished difference. Result has 62 places, 73 transitions, 620 flow [2023-08-30 19:26:06,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=620, PETRI_PLACES=62, PETRI_TRANSITIONS=73} [2023-08-30 19:26:06,487 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2023-08-30 19:26:06,487 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 73 transitions, 620 flow [2023-08-30 19:26:06,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 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 19:26:06,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:26:06,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:26:06,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:26:06,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:26:06,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:26:06,489 INFO L85 PathProgramCache]: Analyzing trace with hash 382118611, now seen corresponding path program 4 times [2023-08-30 19:26:06,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:26:06,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641818475] [2023-08-30 19:26:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:26:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:26:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:26:06,666 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 19:26:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:26:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641818475] [2023-08-30 19:26:06,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641818475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:26:06,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261574350] [2023-08-30 19:26:06,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:26:06,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:26:06,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:26:06,668 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 19:26:06,696 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 19:26:06,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:26:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:26:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:26:06,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:26:06,909 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 19:26:06,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:26:15,307 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 19:26:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261574350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:26:15,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:26:15,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-08-30 19:26:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612692307] [2023-08-30 19:26:15,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:26:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:26:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:26:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:26:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=169, Unknown=3, NotChecked=0, Total=240 [2023-08-30 19:26:17,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:17,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 183 [2023-08-30 19:26:17,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 73 transitions, 620 flow. Second operand has 16 states, 16 states have (on average 79.125) internal successors, (1266), 16 states have internal predecessors, (1266), 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 19:26:17,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:26:17,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 183 [2023-08-30 19:26:17,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:26:20,952 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse4 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse4) (let ((.cse5 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse5 .cse2) 4294967296) 4294967296) .cse3) .cse5)) (< .cse4 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2023-08-30 19:26:23,329 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (< .cse4 (mod c_~a~0 4294967296)) (let ((.cse5 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse5 .cse2) 4294967296) 4294967296) .cse3) .cse5))) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse6 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse4) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse6) (let ((.cse7 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse7 .cse2) 4294967296) 4294967296) .cse3) .cse7)) (< .cse6 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2023-08-30 19:26:33,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:35,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:37,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:40,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:42,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:44,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:46,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:48,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:52,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:54,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:56,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:26:58,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:00,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:02,695 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse4 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse4 .cse2) 4294967296) 4294967296) .cse3) .cse4)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse5 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse5) (let ((.cse6 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse6 .cse2) 4294967296) 4294967296) .cse3) .cse6)) (< .cse5 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2023-08-30 19:27:07,024 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse2 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (= c_thread2Thread1of1ForFork2_~i~1 0) (let ((.cse0 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse0 .cse1) 4294967296) 4294967296) .cse2) .cse0)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse3 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse3) (let ((.cse4 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse4 .cse1) 4294967296) 4294967296) .cse2) .cse4)) (< .cse3 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2023-08-30 19:27:09,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:11,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:13,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:15,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:17,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:17,781 INFO L130 PetriNetUnfolder]: 2454/3782 cut-off events. [2023-08-30 19:27:17,781 INFO L131 PetriNetUnfolder]: For 17335/17335 co-relation queries the response was YES. [2023-08-30 19:27:17,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16956 conditions, 3782 events. 2454/3782 cut-off events. For 17335/17335 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19611 event pairs, 314 based on Foata normal form. 48/3830 useless extension candidates. Maximal degree in co-relation 15025. Up to 1316 conditions per place. [2023-08-30 19:27:17,803 INFO L137 encePairwiseOnDemand]: 171/183 looper letters, 198 selfloop transitions, 127 changer transitions 3/328 dead transitions. [2023-08-30 19:27:17,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 328 transitions, 2791 flow [2023-08-30 19:27:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 19:27:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 19:27:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2094 transitions. [2023-08-30 19:27:17,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476775956284153 [2023-08-30 19:27:17,809 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2094 transitions. [2023-08-30 19:27:17,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2094 transitions. [2023-08-30 19:27:17,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:17,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2094 transitions. [2023-08-30 19:27:17,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.25) internal successors, (2094), 24 states have internal predecessors, (2094), 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 19:27:17,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 183.0) internal successors, (4575), 25 states have internal predecessors, (4575), 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 19:27:17,822 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 183.0) internal successors, (4575), 25 states have internal predecessors, (4575), 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 19:27:17,822 INFO L175 Difference]: Start difference. First operand has 62 places, 73 transitions, 620 flow. Second operand 24 states and 2094 transitions. [2023-08-30 19:27:17,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 328 transitions, 2791 flow [2023-08-30 19:27:17,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 328 transitions, 2733 flow, removed 29 selfloop flow, removed 1 redundant places. [2023-08-30 19:27:17,919 INFO L231 Difference]: Finished difference. Result has 104 places, 175 transitions, 1992 flow [2023-08-30 19:27:17,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1992, PETRI_PLACES=104, PETRI_TRANSITIONS=175} [2023-08-30 19:27:17,920 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2023-08-30 19:27:17,920 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 175 transitions, 1992 flow [2023-08-30 19:27:17,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 79.125) internal successors, (1266), 16 states have internal predecessors, (1266), 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 19:27:17,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:17,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:17,932 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 19:27:18,127 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 19:27:18,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:18,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2033487921, now seen corresponding path program 1 times [2023-08-30 19:27:18,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:18,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800949668] [2023-08-30 19:27:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:18,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:18,327 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 19:27:18,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:18,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800949668] [2023-08-30 19:27:18,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800949668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:18,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771496872] [2023-08-30 19:27:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:18,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:18,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:18,333 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 19:27:18,335 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 19:27:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 19:27:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:18,463 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 19:27:18,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:18,539 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 19:27:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771496872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:18,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-08-30 19:27:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450739015] [2023-08-30 19:27:18,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:18,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:27:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:27:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:27:18,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 183 [2023-08-30 19:27:18,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 175 transitions, 1992 flow. Second operand has 10 states, 10 states have (on average 81.8) internal successors, (818), 10 states have internal predecessors, (818), 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 19:27:18,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:18,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 183 [2023-08-30 19:27:18,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:19,633 INFO L130 PetriNetUnfolder]: 2712/4239 cut-off events. [2023-08-30 19:27:19,634 INFO L131 PetriNetUnfolder]: For 73986/73986 co-relation queries the response was YES. [2023-08-30 19:27:19,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30799 conditions, 4239 events. 2712/4239 cut-off events. For 73986/73986 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23151 event pairs, 530 based on Foata normal form. 38/4277 useless extension candidates. Maximal degree in co-relation 25178. Up to 1548 conditions per place. [2023-08-30 19:27:19,718 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 230 selfloop transitions, 80 changer transitions 4/314 dead transitions. [2023-08-30 19:27:19,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 314 transitions, 4124 flow [2023-08-30 19:27:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:27:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:27:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 913 transitions. [2023-08-30 19:27:19,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989071038251366 [2023-08-30 19:27:19,721 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 913 transitions. [2023-08-30 19:27:19,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 913 transitions. [2023-08-30 19:27:19,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:27:19,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 913 transitions. [2023-08-30 19:27:19,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.3) internal successors, (913), 10 states have internal predecessors, (913), 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 19:27:19,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 183.0) internal successors, (2013), 11 states have internal predecessors, (2013), 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 19:27:19,727 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 183.0) internal successors, (2013), 11 states have internal predecessors, (2013), 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 19:27:19,727 INFO L175 Difference]: Start difference. First operand has 104 places, 175 transitions, 1992 flow. Second operand 10 states and 913 transitions. [2023-08-30 19:27:19,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 314 transitions, 4124 flow [2023-08-30 19:27:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 314 transitions, 3784 flow, removed 170 selfloop flow, removed 0 redundant places. [2023-08-30 19:27:19,916 INFO L231 Difference]: Finished difference. Result has 118 places, 206 transitions, 2423 flow [2023-08-30 19:27:19,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2423, PETRI_PLACES=118, PETRI_TRANSITIONS=206} [2023-08-30 19:27:19,918 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-08-30 19:27:19,919 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 206 transitions, 2423 flow [2023-08-30 19:27:19,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.8) internal successors, (818), 10 states have internal predecessors, (818), 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 19:27:19,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:27:19,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:27:19,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:27:20,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:20,128 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:27:20,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:27:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1972104569, now seen corresponding path program 2 times [2023-08-30 19:27:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:27:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447715404] [2023-08-30 19:27:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:27:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:27:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:27:20,351 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 19:27:20,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:27:20,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447715404] [2023-08-30 19:27:20,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447715404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:27:20,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091410797] [2023-08-30 19:27:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:27:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:27:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:27:20,353 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 19:27:20,355 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 19:27:20,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:27:20,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:27:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 19:27:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:27:20,545 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 19:27:20,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:27:22,662 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 19:27:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091410797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:27:22,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:27:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2023-08-30 19:27:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923836405] [2023-08-30 19:27:22,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:27:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:27:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:27:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:27:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2023-08-30 19:27:25,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:30,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:32,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 183 [2023-08-30 19:27:32,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 206 transitions, 2423 flow. Second operand has 10 states, 10 states have (on average 80.6) internal successors, (806), 10 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:27:32,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:27:32,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 183 [2023-08-30 19:27:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:27:34,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:36,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:38,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:44,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:46,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:48,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:51,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:54,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:27:57,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:01,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:03,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:05,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:10,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:15,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:17,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:20,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:21,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:24,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:27,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:32,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:34,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:37,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:40,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:42,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:44,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:46,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:48,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:50,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:51,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:53,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:28:56,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:00,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:02,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:04,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:07,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:09,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:11,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:13,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:15,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:16,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:18,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:20,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:23,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:29,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:31,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:36,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:37,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:37,790 INFO L130 PetriNetUnfolder]: 3500/5465 cut-off events. [2023-08-30 19:29:37,790 INFO L131 PetriNetUnfolder]: For 114130/114130 co-relation queries the response was YES. [2023-08-30 19:29:37,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42255 conditions, 5465 events. 3500/5465 cut-off events. For 114130/114130 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30879 event pairs, 556 based on Foata normal form. 20/5455 useless extension candidates. Maximal degree in co-relation 34646. Up to 2056 conditions per place. [2023-08-30 19:29:37,843 INFO L137 encePairwiseOnDemand]: 173/183 looper letters, 252 selfloop transitions, 162 changer transitions 2/416 dead transitions. [2023-08-30 19:29:37,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 416 transitions, 5762 flow [2023-08-30 19:29:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:29:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:29:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1263 transitions. [2023-08-30 19:29:37,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929742388758782 [2023-08-30 19:29:37,853 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1263 transitions. [2023-08-30 19:29:37,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1263 transitions. [2023-08-30 19:29:37,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:37,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1263 transitions. [2023-08-30 19:29:37,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.21428571428571) internal successors, (1263), 14 states have internal predecessors, (1263), 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 19:29:37,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 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 19:29:37,860 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 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 19:29:37,860 INFO L175 Difference]: Start difference. First operand has 118 places, 206 transitions, 2423 flow. Second operand 14 states and 1263 transitions. [2023-08-30 19:29:37,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 416 transitions, 5762 flow [2023-08-30 19:29:38,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 416 transitions, 5639 flow, removed 40 selfloop flow, removed 1 redundant places. [2023-08-30 19:29:38,159 INFO L231 Difference]: Finished difference. Result has 140 places, 284 transitions, 4066 flow [2023-08-30 19:29:38,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4066, PETRI_PLACES=140, PETRI_TRANSITIONS=284} [2023-08-30 19:29:38,160 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2023-08-30 19:29:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 284 transitions, 4066 flow [2023-08-30 19:29:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 10 states have internal predecessors, (806), 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 19:29:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:38,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 19:29:38,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:38,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:29:38,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash -245491509, now seen corresponding path program 5 times [2023-08-30 19:29:38,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:38,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298891821] [2023-08-30 19:29:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:38,540 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 19:29:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298891821] [2023-08-30 19:29:38,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298891821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:29:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726221545] [2023-08-30 19:29:38,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:29:38,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:29:38,545 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 19:29:38,549 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 19:29:38,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:29:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:29:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:29:38,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:29:38,732 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 19:29:38,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:29:38,943 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 19:29:38,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726221545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:29:38,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:29:38,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 19:29:38,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860946604] [2023-08-30 19:29:38,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:29:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:29:38,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:29:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:29:39,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 183 [2023-08-30 19:29:39,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 284 transitions, 4066 flow. Second operand has 12 states, 12 states have (on average 81.91666666666667) internal successors, (983), 12 states have internal predecessors, (983), 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 19:29:39,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:39,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 183 [2023-08-30 19:29:39,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:40,543 INFO L130 PetriNetUnfolder]: 3722/5919 cut-off events. [2023-08-30 19:29:40,543 INFO L131 PetriNetUnfolder]: For 144499/144499 co-relation queries the response was YES. [2023-08-30 19:29:40,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49479 conditions, 5919 events. 3722/5919 cut-off events. For 144499/144499 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35032 event pairs, 672 based on Foata normal form. 28/5931 useless extension candidates. Maximal degree in co-relation 41708. Up to 2212 conditions per place. [2023-08-30 19:29:40,612 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 265 selfloop transitions, 190 changer transitions 3/458 dead transitions. [2023-08-30 19:29:40,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 458 transitions, 7189 flow [2023-08-30 19:29:40,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:29:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:29:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 913 transitions. [2023-08-30 19:29:40,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989071038251366 [2023-08-30 19:29:40,616 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 913 transitions. [2023-08-30 19:29:40,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 913 transitions. [2023-08-30 19:29:40,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:40,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 913 transitions. [2023-08-30 19:29:40,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.3) internal successors, (913), 10 states have internal predecessors, (913), 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 19:29:40,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 183.0) internal successors, (2013), 11 states have internal predecessors, (2013), 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 19:29:40,622 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 183.0) internal successors, (2013), 11 states have internal predecessors, (2013), 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 19:29:40,622 INFO L175 Difference]: Start difference. First operand has 140 places, 284 transitions, 4066 flow. Second operand 10 states and 913 transitions. [2023-08-30 19:29:40,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 458 transitions, 7189 flow [2023-08-30 19:29:41,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 458 transitions, 6985 flow, removed 92 selfloop flow, removed 1 redundant places. [2023-08-30 19:29:41,125 INFO L231 Difference]: Finished difference. Result has 154 places, 337 transitions, 5464 flow [2023-08-30 19:29:41,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5464, PETRI_PLACES=154, PETRI_TRANSITIONS=337} [2023-08-30 19:29:41,126 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2023-08-30 19:29:41,126 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 337 transitions, 5464 flow [2023-08-30 19:29:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.91666666666667) internal successors, (983), 12 states have internal predecessors, (983), 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 19:29:41,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:41,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:41,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:29:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:41,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:29:41,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1351540861, now seen corresponding path program 3 times [2023-08-30 19:29:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:41,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683058375] [2023-08-30 19:29:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:29:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683058375] [2023-08-30 19:29:41,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683058375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:29:41,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:29:41,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:29:41,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366231793] [2023-08-30 19:29:41,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:29:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:29:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:29:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:29:41,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 183 [2023-08-30 19:29:41,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 337 transitions, 5464 flow. Second operand has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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 19:29:41,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:41,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 183 [2023-08-30 19:29:41,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:42,614 INFO L130 PetriNetUnfolder]: 3862/6180 cut-off events. [2023-08-30 19:29:42,614 INFO L131 PetriNetUnfolder]: For 166500/166500 co-relation queries the response was YES. [2023-08-30 19:29:42,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53544 conditions, 6180 events. 3862/6180 cut-off events. For 166500/166500 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37351 event pairs, 1078 based on Foata normal form. 36/6200 useless extension candidates. Maximal degree in co-relation 52703. Up to 3208 conditions per place. [2023-08-30 19:29:42,682 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 368 selfloop transitions, 68 changer transitions 14/450 dead transitions. [2023-08-30 19:29:42,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 450 transitions, 7997 flow [2023-08-30 19:29:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:29:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:29:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 640 transitions. [2023-08-30 19:29:42,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4996096799375488 [2023-08-30 19:29:42,685 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 640 transitions. [2023-08-30 19:29:42,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 640 transitions. [2023-08-30 19:29:42,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:29:42,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 640 transitions. [2023-08-30 19:29:42,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.42857142857143) internal successors, (640), 7 states have internal predecessors, (640), 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 19:29:42,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:29:42,689 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:29:42,689 INFO L175 Difference]: Start difference. First operand has 154 places, 337 transitions, 5464 flow. Second operand 7 states and 640 transitions. [2023-08-30 19:29:42,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 450 transitions, 7997 flow [2023-08-30 19:29:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 450 transitions, 7713 flow, removed 52 selfloop flow, removed 3 redundant places. [2023-08-30 19:29:43,160 INFO L231 Difference]: Finished difference. Result has 160 places, 345 transitions, 5614 flow [2023-08-30 19:29:43,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5614, PETRI_PLACES=160, PETRI_TRANSITIONS=345} [2023-08-30 19:29:43,161 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2023-08-30 19:29:43,161 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 345 transitions, 5614 flow [2023-08-30 19:29:43,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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 19:29:43,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:29:43,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:29:43,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:29:43,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:29:43,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:29:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash -469037225, now seen corresponding path program 6 times [2023-08-30 19:29:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:29:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360337849] [2023-08-30 19:29:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:29:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:29:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:29:43,307 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 19:29:43,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:29:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360337849] [2023-08-30 19:29:43,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360337849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:29:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97780470] [2023-08-30 19:29:43,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:29:43,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:29:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:29:43,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:29:43,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:29:43,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:29:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:29:43,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:29:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:29:43,534 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 19:29:43,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:29:45,865 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 19:29:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97780470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:29:45,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:29:45,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-08-30 19:29:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623738367] [2023-08-30 19:29:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:29:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:29:45,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:29:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:29:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:29:47,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:48,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 183 [2023-08-30 19:29:48,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 345 transitions, 5614 flow. Second operand has 17 states, 17 states have (on average 80.11764705882354) internal successors, (1362), 17 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:29:48,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:29:48,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 183 [2023-08-30 19:29:48,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:29:54,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:56,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:29:58,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:00,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:02,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:05,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:07,970 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (< .cse0 0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse4 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse3) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse4) (< .cse4 0) (let ((.cse5 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse5 4294967296) 4294967296)) .cse5)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (let ((.cse6 (* 4294967295 c_~a~0))) (< (+ .cse1 (* (div .cse6 4294967296) 4294967296)) .cse6)) (< .cse3 (mod c_~a~0 4294967296))))) is different from false [2023-08-30 19:30:32,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:34,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:36,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:40,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:42,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:45,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:47,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:49,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:51,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:53,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:55,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:30:57,305 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (< .cse0 0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse3 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) 4294967296) 4294967296) .cse1) .cse3)))) is different from false [2023-08-30 19:30:59,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:01,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:03,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:05,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:07,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:09,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:12,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:14,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:16,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:18,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:20,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:22,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:25,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:27,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:29,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:31,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:31:31,289 INFO L130 PetriNetUnfolder]: 6410/10114 cut-off events. [2023-08-30 19:31:31,289 INFO L131 PetriNetUnfolder]: For 246129/246129 co-relation queries the response was YES. [2023-08-30 19:31:31,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86097 conditions, 10114 events. 6410/10114 cut-off events. For 246129/246129 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 64707 event pairs, 1045 based on Foata normal form. 42/10140 useless extension candidates. Maximal degree in co-relation 85717. Up to 3846 conditions per place. [2023-08-30 19:31:31,377 INFO L137 encePairwiseOnDemand]: 167/183 looper letters, 493 selfloop transitions, 289 changer transitions 2/784 dead transitions. [2023-08-30 19:31:31,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 784 transitions, 12817 flow [2023-08-30 19:31:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 19:31:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 19:31:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2239 transitions. [2023-08-30 19:31:31,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893989071038251 [2023-08-30 19:31:31,396 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2239 transitions. [2023-08-30 19:31:31,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2239 transitions. [2023-08-30 19:31:31,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:31,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2239 transitions. [2023-08-30 19:31:31,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 89.56) internal successors, (2239), 25 states have internal predecessors, (2239), 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 19:31:31,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 183.0) internal successors, (4758), 26 states have internal predecessors, (4758), 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 19:31:31,408 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 183.0) internal successors, (4758), 26 states have internal predecessors, (4758), 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 19:31:31,408 INFO L175 Difference]: Start difference. First operand has 160 places, 345 transitions, 5614 flow. Second operand 25 states and 2239 transitions. [2023-08-30 19:31:31,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 784 transitions, 12817 flow [2023-08-30 19:31:32,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 784 transitions, 12652 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 19:31:32,031 INFO L231 Difference]: Finished difference. Result has 200 places, 494 transitions, 8761 flow [2023-08-30 19:31:32,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=5477, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8761, PETRI_PLACES=200, PETRI_TRANSITIONS=494} [2023-08-30 19:31:32,032 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 171 predicate places. [2023-08-30 19:31:32,032 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 494 transitions, 8761 flow [2023-08-30 19:31:32,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.11764705882354) internal successors, (1362), 17 states have internal predecessors, (1362), 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 19:31:32,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:32,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:32,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:31:32,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:32,240 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:32,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1263392859, now seen corresponding path program 7 times [2023-08-30 19:31:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:32,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918394880] [2023-08-30 19:31:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:32,415 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 19:31:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918394880] [2023-08-30 19:31:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918394880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673793854] [2023-08-30 19:31:32,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:31:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:32,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:32,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:31:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:31:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:32,659 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 19:31:32,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673793854] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:32,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:31:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-08-30 19:31:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936876161] [2023-08-30 19:31:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:31:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:31:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:31:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:31:32,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-30 19:31:32,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 494 transitions, 8761 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:32,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:32,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-30 19:31:32,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:35,015 INFO L130 PetriNetUnfolder]: 6762/10711 cut-off events. [2023-08-30 19:31:35,015 INFO L131 PetriNetUnfolder]: For 373005/373167 co-relation queries the response was YES. [2023-08-30 19:31:35,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108722 conditions, 10711 events. 6762/10711 cut-off events. For 373005/373167 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 69973 event pairs, 1178 based on Foata normal form. 76/10748 useless extension candidates. Maximal degree in co-relation 107679. Up to 4193 conditions per place. [2023-08-30 19:31:35,146 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 440 selfloop transitions, 197 changer transitions 1/648 dead transitions. [2023-08-30 19:31:35,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 648 transitions, 12374 flow [2023-08-30 19:31:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:31:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:31:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2023-08-30 19:31:35,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519808743169399 [2023-08-30 19:31:35,149 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 761 transitions. [2023-08-30 19:31:35,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 761 transitions. [2023-08-30 19:31:35,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:35,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 761 transitions. [2023-08-30 19:31:35,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 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 19:31:35,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 183.0) internal successors, (1647), 9 states have internal predecessors, (1647), 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 19:31:35,153 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 183.0) internal successors, (1647), 9 states have internal predecessors, (1647), 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 19:31:35,153 INFO L175 Difference]: Start difference. First operand has 200 places, 494 transitions, 8761 flow. Second operand 8 states and 761 transitions. [2023-08-30 19:31:35,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 648 transitions, 12374 flow [2023-08-30 19:31:36,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 648 transitions, 11834 flow, removed 270 selfloop flow, removed 0 redundant places. [2023-08-30 19:31:36,578 INFO L231 Difference]: Finished difference. Result has 211 places, 528 transitions, 9678 flow [2023-08-30 19:31:36,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=8371, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9678, PETRI_PLACES=211, PETRI_TRANSITIONS=528} [2023-08-30 19:31:36,580 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-08-30 19:31:36,580 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 528 transitions, 9678 flow [2023-08-30 19:31:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:36,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:36,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:36,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:31:36,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:36,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:36,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash 27840999, now seen corresponding path program 4 times [2023-08-30 19:31:36,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:36,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283060442] [2023-08-30 19:31:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:36,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:36,976 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 19:31:36,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283060442] [2023-08-30 19:31:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283060442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734951043] [2023-08-30 19:31:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:31:36,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:36,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:36,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:37,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:31:37,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:31:37,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 19:31:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:37,146 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 19:31:37,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:37,300 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 19:31:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734951043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:31:37,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:31:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 19:31:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311755920] [2023-08-30 19:31:37,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:31:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:31:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:31:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:31:37,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 183 [2023-08-30 19:31:37,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 528 transitions, 9678 flow. Second operand has 11 states, 11 states have (on average 81.72727272727273) internal successors, (899), 11 states have internal predecessors, (899), 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 19:31:37,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:37,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 183 [2023-08-30 19:31:37,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:39,838 INFO L130 PetriNetUnfolder]: 6836/10792 cut-off events. [2023-08-30 19:31:39,838 INFO L131 PetriNetUnfolder]: For 390284/390284 co-relation queries the response was YES. [2023-08-30 19:31:39,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110452 conditions, 10792 events. 6836/10792 cut-off events. For 390284/390284 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 70044 event pairs, 2231 based on Foata normal form. 16/10804 useless extension candidates. Maximal degree in co-relation 109385. Up to 7454 conditions per place. [2023-08-30 19:31:39,968 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 544 selfloop transitions, 82 changer transitions 2/628 dead transitions. [2023-08-30 19:31:39,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 628 transitions, 12458 flow [2023-08-30 19:31:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:31:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:31:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2023-08-30 19:31:39,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492583918813427 [2023-08-30 19:31:39,970 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2023-08-30 19:31:39,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2023-08-30 19:31:39,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:39,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2023-08-30 19:31:39,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 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 19:31:39,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:31:39,973 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:31:39,973 INFO L175 Difference]: Start difference. First operand has 211 places, 528 transitions, 9678 flow. Second operand 7 states and 631 transitions. [2023-08-30 19:31:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 628 transitions, 12458 flow [2023-08-30 19:31:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 628 transitions, 12428 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 19:31:41,325 INFO L231 Difference]: Finished difference. Result has 220 places, 534 transitions, 10000 flow [2023-08-30 19:31:41,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=9640, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10000, PETRI_PLACES=220, PETRI_TRANSITIONS=534} [2023-08-30 19:31:41,326 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 191 predicate places. [2023-08-30 19:31:41,326 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 534 transitions, 10000 flow [2023-08-30 19:31:41,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.72727272727273) internal successors, (899), 11 states have internal predecessors, (899), 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 19:31:41,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:41,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:41,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 19:31:41,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 19:31:41,532 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:41,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash -730640007, now seen corresponding path program 5 times [2023-08-30 19:31:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:41,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537996874] [2023-08-30 19:31:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:41,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:41,694 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 19:31:41,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:41,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537996874] [2023-08-30 19:31:41,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537996874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:41,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992309794] [2023-08-30 19:31:41,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:31:41,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:41,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:41,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:31:41,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:31:41,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:41,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:31:41,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:41,981 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 19:31:41,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:42,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992309794] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:42,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:31:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-30 19:31:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136061398] [2023-08-30 19:31:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:31:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:31:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:31:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-30 19:31:42,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 183 [2023-08-30 19:31:42,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 534 transitions, 10000 flow. Second operand has 6 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 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 19:31:42,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:42,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 183 [2023-08-30 19:31:42,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:44,479 INFO L130 PetriNetUnfolder]: 7005/11119 cut-off events. [2023-08-30 19:31:44,480 INFO L131 PetriNetUnfolder]: For 432726/433475 co-relation queries the response was YES. [2023-08-30 19:31:44,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116345 conditions, 11119 events. 7005/11119 cut-off events. For 432726/433475 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 74151 event pairs, 1435 based on Foata normal form. 343/11306 useless extension candidates. Maximal degree in co-relation 115343. Up to 5487 conditions per place. [2023-08-30 19:31:44,622 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 360 selfloop transitions, 197 changer transitions 2/614 dead transitions. [2023-08-30 19:31:44,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 614 transitions, 12607 flow [2023-08-30 19:31:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:31:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:31:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-08-30 19:31:44,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072859744990893 [2023-08-30 19:31:44,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-08-30 19:31:44,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-08-30 19:31:44,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:44,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-08-30 19:31:44,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 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 19:31:44,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:31:44,628 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:31:44,628 INFO L175 Difference]: Start difference. First operand has 220 places, 534 transitions, 10000 flow. Second operand 6 states and 557 transitions. [2023-08-30 19:31:44,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 614 transitions, 12607 flow [2023-08-30 19:31:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 614 transitions, 12405 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 19:31:46,030 INFO L231 Difference]: Finished difference. Result has 226 places, 563 transitions, 11237 flow [2023-08-30 19:31:46,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=9846, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11237, PETRI_PLACES=226, PETRI_TRANSITIONS=563} [2023-08-30 19:31:46,031 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 197 predicate places. [2023-08-30 19:31:46,032 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 563 transitions, 11237 flow [2023-08-30 19:31:46,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 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 19:31:46,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:46,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:46,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:31:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 19:31:46,238 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:46,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash 795525465, now seen corresponding path program 8 times [2023-08-30 19:31:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:46,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537100462] [2023-08-30 19:31:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:46,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:46,379 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 19:31:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537100462] [2023-08-30 19:31:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537100462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067912954] [2023-08-30 19:31:46,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:31:46,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:46,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:46,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:31:46,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:31:46,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 19:31:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:46,647 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 19:31:46,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:46,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067912954] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:46,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:31:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 17 [2023-08-30 19:31:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980360453] [2023-08-30 19:31:46,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:31:46,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:31:46,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:46,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:31:46,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:31:46,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-30 19:31:46,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 563 transitions, 11237 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:46,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:46,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-30 19:31:46,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:49,440 INFO L130 PetriNetUnfolder]: 7142/11287 cut-off events. [2023-08-30 19:31:49,440 INFO L131 PetriNetUnfolder]: For 440481/440661 co-relation queries the response was YES. [2023-08-30 19:31:49,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118613 conditions, 11287 events. 7142/11287 cut-off events. For 440481/440661 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 74061 event pairs, 1933 based on Foata normal form. 47/11275 useless extension candidates. Maximal degree in co-relation 117490. Up to 5734 conditions per place. [2023-08-30 19:31:49,554 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 504 selfloop transitions, 113 changer transitions 1/630 dead transitions. [2023-08-30 19:31:49,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 630 transitions, 13360 flow [2023-08-30 19:31:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:31:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:31:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 570 transitions. [2023-08-30 19:31:49,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191256830601093 [2023-08-30 19:31:49,556 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 570 transitions. [2023-08-30 19:31:49,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 570 transitions. [2023-08-30 19:31:49,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:49,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 570 transitions. [2023-08-30 19:31:49,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 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 19:31:49,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:31:49,560 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:31:49,560 INFO L175 Difference]: Start difference. First operand has 226 places, 563 transitions, 11237 flow. Second operand 6 states and 570 transitions. [2023-08-30 19:31:49,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 630 transitions, 13360 flow [2023-08-30 19:31:51,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 630 transitions, 13252 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 19:31:51,247 INFO L231 Difference]: Finished difference. Result has 233 places, 566 transitions, 11508 flow [2023-08-30 19:31:51,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=11129, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11508, PETRI_PLACES=233, PETRI_TRANSITIONS=566} [2023-08-30 19:31:51,248 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2023-08-30 19:31:51,249 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 566 transitions, 11508 flow [2023-08-30 19:31:51,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:51,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:51,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:51,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:31:51,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 19:31:51,453 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:51,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2059082981, now seen corresponding path program 9 times [2023-08-30 19:31:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:51,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686111756] [2023-08-30 19:31:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:51,590 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 19:31:51,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686111756] [2023-08-30 19:31:51,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686111756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401014841] [2023-08-30 19:31:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:31:51,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:51,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:31:51,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:31:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 19:31:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:51,912 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 19:31:51,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:52,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401014841] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:52,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:31:52,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 17 [2023-08-30 19:31:52,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101177166] [2023-08-30 19:31:52,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:31:52,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:31:52,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:31:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:31:52,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-30 19:31:52,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 566 transitions, 11508 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:52,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:52,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-30 19:31:52,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:31:54,658 INFO L130 PetriNetUnfolder]: 7122/11247 cut-off events. [2023-08-30 19:31:54,658 INFO L131 PetriNetUnfolder]: For 444759/444939 co-relation queries the response was YES. [2023-08-30 19:31:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119522 conditions, 11247 events. 7122/11247 cut-off events. For 444759/444939 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 73656 event pairs, 1917 based on Foata normal form. 39/11227 useless extension candidates. Maximal degree in co-relation 118396. Up to 5734 conditions per place. [2023-08-30 19:31:54,770 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 497 selfloop transitions, 116 changer transitions 1/626 dead transitions. [2023-08-30 19:31:54,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 626 transitions, 13536 flow [2023-08-30 19:31:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:31:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:31:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 568 transitions. [2023-08-30 19:31:54,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517304189435337 [2023-08-30 19:31:54,773 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 568 transitions. [2023-08-30 19:31:54,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 568 transitions. [2023-08-30 19:31:54,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:31:54,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 568 transitions. [2023-08-30 19:31:54,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.66666666666667) internal successors, (568), 6 states have internal predecessors, (568), 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 19:31:54,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:31:54,775 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:31:54,776 INFO L175 Difference]: Start difference. First operand has 233 places, 566 transitions, 11508 flow. Second operand 6 states and 568 transitions. [2023-08-30 19:31:54,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 626 transitions, 13536 flow [2023-08-30 19:31:56,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 626 transitions, 13374 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 19:31:56,487 INFO L231 Difference]: Finished difference. Result has 238 places, 567 transitions, 11657 flow [2023-08-30 19:31:56,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11657, PETRI_PLACES=238, PETRI_TRANSITIONS=567} [2023-08-30 19:31:56,488 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2023-08-30 19:31:56,488 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 567 transitions, 11657 flow [2023-08-30 19:31:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:56,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:31:56,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:31:56,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 19:31:56,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:31:56,694 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:31:56,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:31:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2045915515, now seen corresponding path program 10 times [2023-08-30 19:31:56,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:31:56,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192411680] [2023-08-30 19:31:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:31:56,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:31:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:31:56,832 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 19:31:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:31:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192411680] [2023-08-30 19:31:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192411680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570406287] [2023-08-30 19:31:56,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:31:56,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:31:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:31:56,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:31:56,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:31:56,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:31:56,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:31:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:31:56,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:31:57,089 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 19:31:57,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:31:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:31:57,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570406287] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:31:57,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:31:57,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2023-08-30 19:31:57,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701002236] [2023-08-30 19:31:57,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:31:57,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:31:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:31:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:31:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:31:57,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-30 19:31:57,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 567 transitions, 11657 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:31:57,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:31:57,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-30 19:31:57,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:32:00,013 INFO L130 PetriNetUnfolder]: 7104/11199 cut-off events. [2023-08-30 19:32:00,013 INFO L131 PetriNetUnfolder]: For 449220/449400 co-relation queries the response was YES. [2023-08-30 19:32:00,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119502 conditions, 11199 events. 7104/11199 cut-off events. For 449220/449400 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 73151 event pairs, 1791 based on Foata normal form. 35/11175 useless extension candidates. Maximal degree in co-relation 118374. Up to 5403 conditions per place. [2023-08-30 19:32:00,125 INFO L137 encePairwiseOnDemand]: 176/183 looper letters, 481 selfloop transitions, 147 changer transitions 1/641 dead transitions. [2023-08-30 19:32:00,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 641 transitions, 13861 flow [2023-08-30 19:32:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:32:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:32:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 564 transitions. [2023-08-30 19:32:00,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136612021857924 [2023-08-30 19:32:00,127 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 564 transitions. [2023-08-30 19:32:00,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 564 transitions. [2023-08-30 19:32:00,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:32:00,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 564 transitions. [2023-08-30 19:32:00,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 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 19:32:00,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:32:00,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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 19:32:00,130 INFO L175 Difference]: Start difference. First operand has 238 places, 567 transitions, 11657 flow. Second operand 6 states and 564 transitions. [2023-08-30 19:32:00,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 641 transitions, 13861 flow [2023-08-30 19:32:01,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 641 transitions, 13647 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 19:32:01,826 INFO L231 Difference]: Finished difference. Result has 243 places, 569 transitions, 11893 flow [2023-08-30 19:32:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=11445, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11893, PETRI_PLACES=243, PETRI_TRANSITIONS=569} [2023-08-30 19:32:01,827 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 214 predicate places. [2023-08-30 19:32:01,827 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 569 transitions, 11893 flow [2023-08-30 19:32:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 19:32:01,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:32:01,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:32:01,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:32:02,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 19:32:02,029 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:32:02,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:32:02,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2060766139, now seen corresponding path program 1 times [2023-08-30 19:32:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:32:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798446839] [2023-08-30 19:32:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:32:02,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:32:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:32:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:32:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:32:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798446839] [2023-08-30 19:32:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798446839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:32:02,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:32:02,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:32:02,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570690116] [2023-08-30 19:32:02,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:32:02,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:32:02,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:32:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:32:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:32:02,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 183 [2023-08-30 19:32:02,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 569 transitions, 11893 flow. Second operand has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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 19:32:02,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:32:02,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 183 [2023-08-30 19:32:02,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:32:04,779 INFO L130 PetriNetUnfolder]: 7442/11791 cut-off events. [2023-08-30 19:32:04,779 INFO L131 PetriNetUnfolder]: For 479874/479874 co-relation queries the response was YES. [2023-08-30 19:32:04,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126456 conditions, 11791 events. 7442/11791 cut-off events. For 479874/479874 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 77852 event pairs, 2053 based on Foata normal form. 36/11823 useless extension candidates. Maximal degree in co-relation 125325. Up to 6333 conditions per place. [2023-08-30 19:32:04,901 INFO L137 encePairwiseOnDemand]: 175/183 looper letters, 461 selfloop transitions, 220 changer transitions 8/689 dead transitions. [2023-08-30 19:32:04,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 689 transitions, 15100 flow [2023-08-30 19:32:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:32:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:32:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2023-08-30 19:32:04,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492583918813427 [2023-08-30 19:32:04,902 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2023-08-30 19:32:04,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2023-08-30 19:32:04,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:32:04,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2023-08-30 19:32:04,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 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 19:32:04,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:32:04,905 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 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 19:32:04,905 INFO L175 Difference]: Start difference. First operand has 243 places, 569 transitions, 11893 flow. Second operand 7 states and 631 transitions. [2023-08-30 19:32:04,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 689 transitions, 15100 flow [2023-08-30 19:32:06,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 689 transitions, 14878 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 19:32:07,007 INFO L231 Difference]: Finished difference. Result has 252 places, 596 transitions, 12981 flow [2023-08-30 19:32:07,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=11681, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12981, PETRI_PLACES=252, PETRI_TRANSITIONS=596} [2023-08-30 19:32:07,008 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 223 predicate places. [2023-08-30 19:32:07,008 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 596 transitions, 12981 flow [2023-08-30 19:32:07,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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 19:32:07,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:32:07,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:32:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 19:32:07,009 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:32:07,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:32:07,010 INFO L85 PathProgramCache]: Analyzing trace with hash 263033697, now seen corresponding path program 6 times [2023-08-30 19:32:07,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:32:07,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4549120] [2023-08-30 19:32:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:32:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:32:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:32:07,172 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 19:32:07,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:32:07,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4549120] [2023-08-30 19:32:07,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4549120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:32:07,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204714308] [2023-08-30 19:32:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:32:07,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:32:07,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:32:07,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:32:07,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:32:07,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 19:32:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:32:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:32:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:32:07,467 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 19:32:07,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:34:24,107 WARN L222 SmtUtils]: Spent 2.25m on a formula simplification. DAG size of input: 4214 DAG size of output: 3668 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15