./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.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/chl-nzb-file-subst.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 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb --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 19:04:41,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:04:41,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:04:41,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:04:41,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:04:41,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:04:41,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:04:41,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:04:41,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:04:41,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:04:41,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:04:41,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:04:41,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:04:41,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:04:41,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:04:41,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:04:41,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:04:41,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:04:41,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:04:41,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:04:41,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:04:41,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:04:41,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:04:41,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:04:41,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:04:41,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:04:41,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:04:41,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:04:41,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:04:41,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:04:41,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:04:41,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:04:41,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:04:41,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:04:41,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:04:41,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:04:41,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:04:41,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:04:41,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:04:41,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:04:41,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:04:41,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:04:41,635 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:04:41,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:04:41,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:04:41,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:04:41,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:04:41,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:04:41,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:04:41,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:04:41,639 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:04:41,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:04:41,640 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:04:41,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:04:41,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:04:41,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:04:41,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:04:41,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:04:41,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:04:41,641 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:04:41,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:04:41,641 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:04:41,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:04:41,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:04:41,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:04:41,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:04:41,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:04:41,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:04:41,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:04:41,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:04:41,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:04:41,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:04:41,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:04:41,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:04:41,644 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:04:41,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:04:41,644 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:04:41,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:04:41,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:04:41,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:04:41,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:04:41,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:04:41,964 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:04:41,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-30 19:04:43,055 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:04:43,302 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:04:43,303 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-30 19:04:43,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d8a401aa/e2fa7e2fa18d4cb8867121e02183bb82/FLAG8fec7070c [2023-08-30 19:04:43,323 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d8a401aa/e2fa7e2fa18d4cb8867121e02183bb82 [2023-08-30 19:04:43,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:04:43,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:04:43,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:04:43,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:04:43,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:04:43,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c90e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43, skipping insertion in model container [2023-08-30 19:04:43,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:04:43,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:04:43,558 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/chl-nzb-file-subst.wvr.c[6501,6514] [2023-08-30 19:04:43,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:04:43,591 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:04:43,654 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/chl-nzb-file-subst.wvr.c[6501,6514] [2023-08-30 19:04:43,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:04:43,685 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:04:43,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43 WrapperNode [2023-08-30 19:04:43,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:04:43,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:04:43,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:04:43,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:04:43,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,766 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-08-30 19:04:43,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:04:43,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:04:43,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:04:43,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:04:43,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:04:43,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:04:43,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:04:43,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:04:43,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (1/1) ... [2023-08-30 19:04:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:04:43,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:43,894 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 19:04:43,925 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 19:04:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:04:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:04:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:04:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:04:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:04:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:04:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:04:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:04:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:04:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:04:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:04:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:04:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:04:43,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:04:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:04:43,946 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 19:04:44,143 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:04:44,145 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:04:44,902 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:04:44,930 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:04:44,930 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 19:04:44,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:04:44 BoogieIcfgContainer [2023-08-30 19:04:44,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:04:44,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:04:44,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:04:44,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:04:44,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:04:43" (1/3) ... [2023-08-30 19:04:44,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5db267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:04:44, skipping insertion in model container [2023-08-30 19:04:44,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:04:43" (2/3) ... [2023-08-30 19:04:44,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5db267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:04:44, skipping insertion in model container [2023-08-30 19:04:44,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:04:44" (3/3) ... [2023-08-30 19:04:44,943 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-08-30 19:04:44,950 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:04:44,958 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:04:44,958 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:04:44,958 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:04:45,162 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:04:45,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 717 transitions, 1458 flow [2023-08-30 19:04:45,547 INFO L130 PetriNetUnfolder]: 73/714 cut-off events. [2023-08-30 19:04:45,547 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:04:45,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 714 events. 73/714 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2388 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-08-30 19:04:45,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 654 places, 717 transitions, 1458 flow [2023-08-30 19:04:45,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 704 transitions, 1426 flow [2023-08-30 19:04:45,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:04:45,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 704 transitions, 1426 flow [2023-08-30 19:04:45,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 704 transitions, 1426 flow [2023-08-30 19:04:45,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 704 transitions, 1426 flow [2023-08-30 19:04:45,791 INFO L130 PetriNetUnfolder]: 73/704 cut-off events. [2023-08-30 19:04:45,791 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:04:45,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 704 events. 73/704 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2389 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-08-30 19:04:45,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 157248 [2023-08-30 19:05:12,416 INFO L134 LiptonReduction]: Checked pairs total: 150057 [2023-08-30 19:05:12,417 INFO L136 LiptonReduction]: Total number of compositions: 891 [2023-08-30 19:05:12,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:05:12,435 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;@45ef4141, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:05:12,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:05:12,445 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-08-30 19:05:12,445 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:05:12,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:12,446 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 19:05:12,447 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 19:05:12,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1427696023, now seen corresponding path program 1 times [2023-08-30 19:05:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:12,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172347386] [2023-08-30 19:05:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:12,936 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 19:05:12,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:12,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172347386] [2023-08-30 19:05:12,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172347386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:05:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47318048] [2023-08-30 19:05:12,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:05:12,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:05:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:05:13,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 661 out of 1608 [2023-08-30 19:05:13,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 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 19:05:13,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:13,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 661 of 1608 [2023-08-30 19:05:13,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:13,786 INFO L130 PetriNetUnfolder]: 2608/3503 cut-off events. [2023-08-30 19:05:13,786 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-08-30 19:05:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7267 conditions, 3503 events. 2608/3503 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12504 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6748. Up to 3501 conditions per place. [2023-08-30 19:05:13,803 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 44 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-08-30 19:05:13,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 218 flow [2023-08-30 19:05:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:05:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:05:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2037 transitions. [2023-08-30 19:05:13,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-08-30 19:05:13,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2037 transitions. [2023-08-30 19:05:13,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2037 transitions. [2023-08-30 19:05:13,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:13,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2037 transitions. [2023-08-30 19:05:13,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 679.0) internal successors, (2037), 3 states have internal predecessors, (2037), 0 states have call successors, (0), 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 19:05:13,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:13,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:13,856 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 2037 transitions. [2023-08-30 19:05:13,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 218 flow [2023-08-30 19:05:13,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:05:13,864 INFO L231 Difference]: Finished difference. Result has 43 places, 50 transitions, 132 flow [2023-08-30 19:05:13,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=50} [2023-08-30 19:05:13,869 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-30 19:05:13,869 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 50 transitions, 132 flow [2023-08-30 19:05:13,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 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 19:05:13,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:13,871 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, 1, 1] [2023-08-30 19:05:13,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:05:13,872 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 19:05:13,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2065041558, now seen corresponding path program 1 times [2023-08-30 19:05:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:13,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283240619] [2023-08-30 19:05:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:05:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:14,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283240619] [2023-08-30 19:05:14,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283240619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:14,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881585547] [2023-08-30 19:05:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:14,045 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 19:05:14,059 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 19:05:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:14,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 19:05:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:05:14,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:05:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:05:14,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881585547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:05:14,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:05:14,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-30 19:05:14,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827660263] [2023-08-30 19:05:14,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:05:14,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:05:14,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:14,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:05:14,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:05:14,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-30 19:05:14,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 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 19:05:14,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:14,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-30 19:05:14,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:15,117 INFO L130 PetriNetUnfolder]: 2608/3512 cut-off events. [2023-08-30 19:05:15,118 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 19:05:15,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 3512 events. 2608/3512 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12508 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7112. Up to 3501 conditions per place. [2023-08-30 19:05:15,132 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 44 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2023-08-30 19:05:15,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 286 flow [2023-08-30 19:05:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:05:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:05:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3998 transitions. [2023-08-30 19:05:15,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41438640132669985 [2023-08-30 19:05:15,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3998 transitions. [2023-08-30 19:05:15,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3998 transitions. [2023-08-30 19:05:15,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:15,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3998 transitions. [2023-08-30 19:05:15,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 666.3333333333334) internal successors, (3998), 6 states have internal predecessors, (3998), 0 states have call successors, (0), 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 19:05:15,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 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 19:05:15,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 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 19:05:15,174 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 132 flow. Second operand 6 states and 3998 transitions. [2023-08-30 19:05:15,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 286 flow [2023-08-30 19:05:15,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:05:15,176 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 222 flow [2023-08-30 19:05:15,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-08-30 19:05:15,177 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-30 19:05:15,178 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 222 flow [2023-08-30 19:05:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 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 19:05:15,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:15,181 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:15,192 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 19:05:15,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:15,388 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 19:05:15,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash 773664469, now seen corresponding path program 2 times [2023-08-30 19:05:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:15,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553328059] [2023-08-30 19:05:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 19:05:15,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553328059] [2023-08-30 19:05:15,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553328059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624285013] [2023-08-30 19:05:15,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:05:15,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:15,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:15,626 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 19:05:15,637 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 19:05:15,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:05:15,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:05:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:05:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:05:17,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:05:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624285013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:17,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:05:17,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 19:05:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594814886] [2023-08-30 19:05:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:17,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:05:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:05:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:05:17,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-08-30 19:05:17,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 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 19:05:17,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:17,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-08-30 19:05:17,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:19,025 INFO L130 PetriNetUnfolder]: 2934/4017 cut-off events. [2023-08-30 19:05:19,025 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 19:05:19,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8213 conditions, 4017 events. 2934/4017 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15676 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8125. Up to 3431 conditions per place. [2023-08-30 19:05:19,042 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 96 selfloop transitions, 2 changer transitions 7/105 dead transitions. [2023-08-30 19:05:19,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 536 flow [2023-08-30 19:05:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:05:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:05:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3289 transitions. [2023-08-30 19:05:19,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090796019900497 [2023-08-30 19:05:19,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3289 transitions. [2023-08-30 19:05:19,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3289 transitions. [2023-08-30 19:05:19,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:19,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3289 transitions. [2023-08-30 19:05:19,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 657.8) internal successors, (3289), 5 states have internal predecessors, (3289), 0 states have call successors, (0), 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 19:05:19,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:19,073 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:19,073 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 222 flow. Second operand 5 states and 3289 transitions. [2023-08-30 19:05:19,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 536 flow [2023-08-30 19:05:19,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 105 transitions, 512 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 19:05:19,077 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 213 flow [2023-08-30 19:05:19,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-30 19:05:19,077 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-30 19:05:19,078 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 213 flow [2023-08-30 19:05:19,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 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 19:05:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:19,079 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:19,088 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 19:05:19,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 19:05:19,288 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 19:05:19,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1680310845, now seen corresponding path program 3 times [2023-08-30 19:05:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230416043] [2023-08-30 19:05:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 19:05:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230416043] [2023-08-30 19:05:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230416043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143692125] [2023-08-30 19:05:19,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:05:19,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:19,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:19,494 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 19:05:19,497 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 19:05:19,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:05:19,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:05:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:05:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:05:20,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:05:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143692125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:20,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:05:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-08-30 19:05:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424084516] [2023-08-30 19:05:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:05:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:05:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:05:21,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-08-30 19:05:21,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 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 19:05:21,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:21,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-08-30 19:05:21,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:22,456 INFO L130 PetriNetUnfolder]: 3124/4357 cut-off events. [2023-08-30 19:05:22,456 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2023-08-30 19:05:22,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 4357 events. 3124/4357 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18094 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9371. Up to 3869 conditions per place. [2023-08-30 19:05:22,477 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 100 selfloop transitions, 3 changer transitions 7/110 dead transitions. [2023-08-30 19:05:22,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 555 flow [2023-08-30 19:05:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:05:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:05:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3293 transitions. [2023-08-30 19:05:22,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095771144278607 [2023-08-30 19:05:22,485 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3293 transitions. [2023-08-30 19:05:22,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3293 transitions. [2023-08-30 19:05:22,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:22,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3293 transitions. [2023-08-30 19:05:22,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.6) internal successors, (3293), 5 states have internal predecessors, (3293), 0 states have call successors, (0), 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 19:05:22,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:22,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:22,504 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 213 flow. Second operand 5 states and 3293 transitions. [2023-08-30 19:05:22,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 555 flow [2023-08-30 19:05:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 546 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 19:05:22,508 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 230 flow [2023-08-30 19:05:22,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-30 19:05:22,509 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-08-30 19:05:22,509 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 230 flow [2023-08-30 19:05:22,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 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 19:05:22,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:22,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:22,517 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 19:05:22,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:22,717 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 19:05:22,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1405257897, now seen corresponding path program 4 times [2023-08-30 19:05:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:22,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748631280] [2023-08-30 19:05:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 19:05:22,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748631280] [2023-08-30 19:05:22,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748631280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:22,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943100396] [2023-08-30 19:05:22,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:05:22,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:22,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:22,910 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 19:05:22,912 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 19:05:23,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:05:23,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:05:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 19:05:23,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 19:05:23,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:05:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 19:05:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943100396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:05:23,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:05:23,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 19:05:23,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923909470] [2023-08-30 19:05:23,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:05:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:05:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:05:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:05:23,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-30 19:05:23,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 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 19:05:23,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:23,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-30 19:05:23,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:24,196 INFO L130 PetriNetUnfolder]: 3123/4352 cut-off events. [2023-08-30 19:05:24,196 INFO L131 PetriNetUnfolder]: For 1787/1787 co-relation queries the response was YES. [2023-08-30 19:05:24,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9913 conditions, 4352 events. 3123/4352 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17812 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 9879. Up to 4338 conditions per place. [2023-08-30 19:05:24,216 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 46 selfloop transitions, 18 changer transitions 0/64 dead transitions. [2023-08-30 19:05:24,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 376 flow [2023-08-30 19:05:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:05:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:05:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4650 transitions. [2023-08-30 19:05:24,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131130063965885 [2023-08-30 19:05:24,228 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4650 transitions. [2023-08-30 19:05:24,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4650 transitions. [2023-08-30 19:05:24,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:24,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4650 transitions. [2023-08-30 19:05:24,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 664.2857142857143) internal successors, (4650), 7 states have internal predecessors, (4650), 0 states have call successors, (0), 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 19:05:24,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 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 19:05:24,254 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 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 19:05:24,255 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 230 flow. Second operand 7 states and 4650 transitions. [2023-08-30 19:05:24,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 376 flow [2023-08-30 19:05:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 370 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:05:24,260 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 292 flow [2023-08-30 19:05:24,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-30 19:05:24,264 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-30 19:05:24,264 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 292 flow [2023-08-30 19:05:24,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 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 19:05:24,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:24,267 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:24,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:05:24,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:24,476 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 19:05:24,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash -472303414, now seen corresponding path program 5 times [2023-08-30 19:05:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:24,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571178321] [2023-08-30 19:05:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:26,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571178321] [2023-08-30 19:05:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571178321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:26,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:26,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:05:26,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111817734] [2023-08-30 19:05:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:26,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:05:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:26,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:05:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:05:26,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-30 19:05:26,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:26,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:26,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-30 19:05:26,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:28,466 INFO L130 PetriNetUnfolder]: 7479/10347 cut-off events. [2023-08-30 19:05:28,466 INFO L131 PetriNetUnfolder]: For 1820/1820 co-relation queries the response was YES. [2023-08-30 19:05:28,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22274 conditions, 10347 events. 7479/10347 cut-off events. For 1820/1820 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 51307 event pairs, 1252 based on Foata normal form. 1/8396 useless extension candidates. Maximal degree in co-relation 22161. Up to 3749 conditions per place. [2023-08-30 19:05:28,507 INFO L137 encePairwiseOnDemand]: 1595/1608 looper letters, 156 selfloop transitions, 42 changer transitions 1/199 dead transitions. [2023-08-30 19:05:28,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 199 transitions, 1028 flow [2023-08-30 19:05:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:05:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:05:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4632 transitions. [2023-08-30 19:05:28,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115138592750533 [2023-08-30 19:05:28,518 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4632 transitions. [2023-08-30 19:05:28,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4632 transitions. [2023-08-30 19:05:28,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:28,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4632 transitions. [2023-08-30 19:05:28,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 661.7142857142857) internal successors, (4632), 7 states have internal predecessors, (4632), 0 states have call successors, (0), 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 19:05:28,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 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 19:05:28,546 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 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 19:05:28,547 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 292 flow. Second operand 7 states and 4632 transitions. [2023-08-30 19:05:28,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 199 transitions, 1028 flow [2023-08-30 19:05:28,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 199 transitions, 992 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 19:05:28,553 INFO L231 Difference]: Finished difference. Result has 71 places, 107 transitions, 583 flow [2023-08-30 19:05:28,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=71, PETRI_TRANSITIONS=107} [2023-08-30 19:05:28,556 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-30 19:05:28,557 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 107 transitions, 583 flow [2023-08-30 19:05:28,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:28,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:28,558 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:28,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 19:05:28,558 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 19:05:28,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 952440716, now seen corresponding path program 6 times [2023-08-30 19:05:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:28,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616097895] [2023-08-30 19:05:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616097895] [2023-08-30 19:05:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616097895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:29,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:05:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278675287] [2023-08-30 19:05:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:29,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:05:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:05:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:05:29,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-30 19:05:29,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:29,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:29,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-30 19:05:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:32,348 INFO L130 PetriNetUnfolder]: 9673/13376 cut-off events. [2023-08-30 19:05:32,348 INFO L131 PetriNetUnfolder]: For 9800/9800 co-relation queries the response was YES. [2023-08-30 19:05:32,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38275 conditions, 13376 events. 9673/13376 cut-off events. For 9800/9800 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67067 event pairs, 2739 based on Foata normal form. 1/11107 useless extension candidates. Maximal degree in co-relation 38175. Up to 7196 conditions per place. [2023-08-30 19:05:32,420 INFO L137 encePairwiseOnDemand]: 1595/1608 looper letters, 151 selfloop transitions, 47 changer transitions 2/200 dead transitions. [2023-08-30 19:05:32,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 200 transitions, 1371 flow [2023-08-30 19:05:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:05:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:05:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3294 transitions. [2023-08-30 19:05:32,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097014925373134 [2023-08-30 19:05:32,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3294 transitions. [2023-08-30 19:05:32,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3294 transitions. [2023-08-30 19:05:32,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:32,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3294 transitions. [2023-08-30 19:05:32,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.8) internal successors, (3294), 5 states have internal predecessors, (3294), 0 states have call successors, (0), 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 19:05:32,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:32,445 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:32,445 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 583 flow. Second operand 5 states and 3294 transitions. [2023-08-30 19:05:32,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 200 transitions, 1371 flow [2023-08-30 19:05:32,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 200 transitions, 1363 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 19:05:32,554 INFO L231 Difference]: Finished difference. Result has 79 places, 144 transitions, 1035 flow [2023-08-30 19:05:32,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=79, PETRI_TRANSITIONS=144} [2023-08-30 19:05:32,555 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-30 19:05:32,555 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 144 transitions, 1035 flow [2023-08-30 19:05:32,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:32,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:32,557 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:32,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 19:05:32,557 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 19:05:32,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1010676078, now seen corresponding path program 7 times [2023-08-30 19:05:32,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:32,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141394008] [2023-08-30 19:05:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141394008] [2023-08-30 19:05:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141394008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:33,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:33,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:05:33,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436298610] [2023-08-30 19:05:33,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:05:33,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:05:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:05:33,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-30 19:05:33,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 144 transitions, 1035 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:33,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:33,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-30 19:05:33,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:36,393 INFO L130 PetriNetUnfolder]: 10088/14013 cut-off events. [2023-08-30 19:05:36,393 INFO L131 PetriNetUnfolder]: For 18963/18963 co-relation queries the response was YES. [2023-08-30 19:05:36,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44718 conditions, 14013 events. 10088/14013 cut-off events. For 18963/18963 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71621 event pairs, 4629 based on Foata normal form. 1/11640 useless extension candidates. Maximal degree in co-relation 44614. Up to 11506 conditions per place. [2023-08-30 19:05:36,468 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 198 selfloop transitions, 43 changer transitions 2/243 dead transitions. [2023-08-30 19:05:36,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 243 transitions, 2044 flow [2023-08-30 19:05:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:05:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:05:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3304 transitions. [2023-08-30 19:05:36,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109452736318408 [2023-08-30 19:05:36,477 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3304 transitions. [2023-08-30 19:05:36,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3304 transitions. [2023-08-30 19:05:36,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:36,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3304 transitions. [2023-08-30 19:05:36,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 660.8) internal successors, (3304), 5 states have internal predecessors, (3304), 0 states have call successors, (0), 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 19:05:36,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:36,494 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:36,494 INFO L175 Difference]: Start difference. First operand has 79 places, 144 transitions, 1035 flow. Second operand 5 states and 3304 transitions. [2023-08-30 19:05:36,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 243 transitions, 2044 flow [2023-08-30 19:05:36,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 243 transitions, 2032 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 19:05:36,658 INFO L231 Difference]: Finished difference. Result has 86 places, 171 transitions, 1464 flow [2023-08-30 19:05:36,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1464, PETRI_PLACES=86, PETRI_TRANSITIONS=171} [2023-08-30 19:05:36,659 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-08-30 19:05:36,659 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 171 transitions, 1464 flow [2023-08-30 19:05:36,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:36,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:36,660 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 19:05:36,660 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 19:05:36,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1354860510, now seen corresponding path program 8 times [2023-08-30 19:05:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393949173] [2023-08-30 19:05:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:37,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:37,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393949173] [2023-08-30 19:05:37,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393949173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:37,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:37,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:05:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754569209] [2023-08-30 19:05:37,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:37,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:05:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:05:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:05:37,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-30 19:05:37,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 171 transitions, 1464 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:37,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:37,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-30 19:05:37,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:40,811 INFO L130 PetriNetUnfolder]: 10233/14236 cut-off events. [2023-08-30 19:05:40,811 INFO L131 PetriNetUnfolder]: For 27028/27028 co-relation queries the response was YES. [2023-08-30 19:05:40,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49716 conditions, 14236 events. 10233/14236 cut-off events. For 27028/27028 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74045 event pairs, 2601 based on Foata normal form. 1/11817 useless extension candidates. Maximal degree in co-relation 49608. Up to 7212 conditions per place. [2023-08-30 19:05:40,892 INFO L137 encePairwiseOnDemand]: 1597/1608 looper letters, 190 selfloop transitions, 47 changer transitions 2/239 dead transitions. [2023-08-30 19:05:40,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 239 transitions, 2269 flow [2023-08-30 19:05:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:05:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:05:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3299 transitions. [2023-08-30 19:05:40,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103233830845771 [2023-08-30 19:05:40,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3299 transitions. [2023-08-30 19:05:40,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3299 transitions. [2023-08-30 19:05:40,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:40,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3299 transitions. [2023-08-30 19:05:40,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 0 states have call successors, (0), 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 19:05:40,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:40,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:05:40,914 INFO L175 Difference]: Start difference. First operand has 86 places, 171 transitions, 1464 flow. Second operand 5 states and 3299 transitions. [2023-08-30 19:05:40,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 239 transitions, 2269 flow [2023-08-30 19:05:41,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 239 transitions, 2261 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 19:05:41,216 INFO L231 Difference]: Finished difference. Result has 92 places, 180 transitions, 1699 flow [2023-08-30 19:05:41,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1699, PETRI_PLACES=92, PETRI_TRANSITIONS=180} [2023-08-30 19:05:41,217 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-08-30 19:05:41,217 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 180 transitions, 1699 flow [2023-08-30 19:05:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 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 19:05:41,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:41,218 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:41,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:05:41,219 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 19:05:41,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1151516539, now seen corresponding path program 1 times [2023-08-30 19:05:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:41,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548105311] [2023-08-30 19:05:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:41,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:41,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548105311] [2023-08-30 19:05:41,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548105311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:41,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:41,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:05:41,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770877711] [2023-08-30 19:05:41,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:41,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:05:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:05:41,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:05:41,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-30 19:05:41,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 180 transitions, 1699 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 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 19:05:41,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:41,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-30 19:05:41,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:44,817 INFO L130 PetriNetUnfolder]: 14718/20390 cut-off events. [2023-08-30 19:05:44,817 INFO L131 PetriNetUnfolder]: For 46162/46162 co-relation queries the response was YES. [2023-08-30 19:05:44,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74089 conditions, 20390 events. 14718/20390 cut-off events. For 46162/46162 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 106906 event pairs, 5671 based on Foata normal form. 280/17004 useless extension candidates. Maximal degree in co-relation 73978. Up to 13705 conditions per place. [2023-08-30 19:05:44,938 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 223 selfloop transitions, 12 changer transitions 0/235 dead transitions. [2023-08-30 19:05:44,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 235 transitions, 2581 flow [2023-08-30 19:05:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:05:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:05:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2074 transitions. [2023-08-30 19:05:44,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299336650082919 [2023-08-30 19:05:44,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2074 transitions. [2023-08-30 19:05:44,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2074 transitions. [2023-08-30 19:05:44,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:44,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2074 transitions. [2023-08-30 19:05:44,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 691.3333333333334) internal successors, (2074), 3 states have internal predecessors, (2074), 0 states have call successors, (0), 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 19:05:44,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:44,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:44,952 INFO L175 Difference]: Start difference. First operand has 92 places, 180 transitions, 1699 flow. Second operand 3 states and 2074 transitions. [2023-08-30 19:05:44,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 235 transitions, 2581 flow [2023-08-30 19:05:45,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 235 transitions, 2490 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 19:05:45,505 INFO L231 Difference]: Finished difference. Result has 94 places, 170 transitions, 1544 flow [2023-08-30 19:05:45,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=94, PETRI_TRANSITIONS=170} [2023-08-30 19:05:45,506 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-08-30 19:05:45,506 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 170 transitions, 1544 flow [2023-08-30 19:05:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 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 19:05:45,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:45,507 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:45,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 19:05:45,507 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 19:05:45,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -977446447, now seen corresponding path program 1 times [2023-08-30 19:05:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694024307] [2023-08-30 19:05:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:45,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:45,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694024307] [2023-08-30 19:05:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694024307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:45,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:05:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698963067] [2023-08-30 19:05:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:05:45,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:05:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:05:45,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-30 19:05:45,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 170 transitions, 1544 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 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 19:05:45,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:45,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-30 19:05:45,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:49,460 INFO L130 PetriNetUnfolder]: 19754/27154 cut-off events. [2023-08-30 19:05:49,460 INFO L131 PetriNetUnfolder]: For 60626/60626 co-relation queries the response was YES. [2023-08-30 19:05:49,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95880 conditions, 27154 events. 19754/27154 cut-off events. For 60626/60626 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 142925 event pairs, 7741 based on Foata normal form. 0/22232 useless extension candidates. Maximal degree in co-relation 95768. Up to 20577 conditions per place. [2023-08-30 19:05:49,628 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 219 selfloop transitions, 8 changer transitions 0/227 dead transitions. [2023-08-30 19:05:49,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 227 transitions, 2405 flow [2023-08-30 19:05:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:05:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:05:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2072 transitions. [2023-08-30 19:05:49,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295190713101161 [2023-08-30 19:05:49,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2072 transitions. [2023-08-30 19:05:49,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2072 transitions. [2023-08-30 19:05:49,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:49,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2072 transitions. [2023-08-30 19:05:49,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 690.6666666666666) internal successors, (2072), 3 states have internal predecessors, (2072), 0 states have call successors, (0), 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 19:05:49,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:49,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:49,640 INFO L175 Difference]: Start difference. First operand has 94 places, 170 transitions, 1544 flow. Second operand 3 states and 2072 transitions. [2023-08-30 19:05:49,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 227 transitions, 2405 flow [2023-08-30 19:05:50,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 227 transitions, 2388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:05:50,181 INFO L231 Difference]: Finished difference. Result has 96 places, 171 transitions, 1562 flow [2023-08-30 19:05:50,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1562, PETRI_PLACES=96, PETRI_TRANSITIONS=171} [2023-08-30 19:05:50,182 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-08-30 19:05:50,182 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 171 transitions, 1562 flow [2023-08-30 19:05:50,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 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 19:05:50,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:50,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:50,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 19:05:50,183 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 19:05:50,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1136703417, now seen corresponding path program 1 times [2023-08-30 19:05:50,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:50,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4626435] [2023-08-30 19:05:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:50,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:50,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4626435] [2023-08-30 19:05:50,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4626435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:05:50,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:05:50,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:05:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198706311] [2023-08-30 19:05:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:05:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:05:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:05:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:05:50,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-30 19:05:50,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 171 transitions, 1562 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 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 19:05:50,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:50,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-30 19:05:50,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:05:54,397 INFO L130 PetriNetUnfolder]: 21302/29548 cut-off events. [2023-08-30 19:05:54,398 INFO L131 PetriNetUnfolder]: For 67464/67464 co-relation queries the response was YES. [2023-08-30 19:05:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103929 conditions, 29548 events. 21302/29548 cut-off events. For 67464/67464 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 161445 event pairs, 9453 based on Foata normal form. 0/25586 useless extension candidates. Maximal degree in co-relation 103816. Up to 24393 conditions per place. [2023-08-30 19:05:54,564 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 187 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2023-08-30 19:05:54,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 206 transitions, 2158 flow [2023-08-30 19:05:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:05:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:05:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2023-08-30 19:05:54,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-08-30 19:05:54,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2023-08-30 19:05:54,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2023-08-30 19:05:54,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:54,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2023-08-30 19:05:54,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 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 19:05:54,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:54,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 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 19:05:54,576 INFO L175 Difference]: Start difference. First operand has 96 places, 171 transitions, 1562 flow. Second operand 3 states and 2076 transitions. [2023-08-30 19:05:54,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 206 transitions, 2158 flow [2023-08-30 19:05:55,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 206 transitions, 2147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:05:55,313 INFO L231 Difference]: Finished difference. Result has 98 places, 164 transitions, 1534 flow [2023-08-30 19:05:55,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1534, PETRI_PLACES=98, PETRI_TRANSITIONS=164} [2023-08-30 19:05:55,314 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2023-08-30 19:05:55,314 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 164 transitions, 1534 flow [2023-08-30 19:05:55,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 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 19:05:55,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:05:55,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:05:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 19:05:55,315 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 19:05:55,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:05:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash -345962665, now seen corresponding path program 1 times [2023-08-30 19:05:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:05:55,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260925594] [2023-08-30 19:05:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:55,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:05:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:55,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:05:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260925594] [2023-08-30 19:05:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260925594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:05:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897600134] [2023-08-30 19:05:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:05:55,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:05:55,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:05:55,597 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 19:05:55,603 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 19:05:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:05:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:05:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:05:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:55,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:05:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:05:56,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897600134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:05:56,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:05:56,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 19:05:56,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778893019] [2023-08-30 19:05:56,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:05:56,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:05:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:05:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:05:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 19:05:56,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-30 19:05:56,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 164 transitions, 1534 flow. Second operand has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 0 states have call successors, (0), 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 19:05:56,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:05:56,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-30 19:05:56,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:06:01,382 INFO L130 PetriNetUnfolder]: 21832/30378 cut-off events. [2023-08-30 19:06:01,382 INFO L131 PetriNetUnfolder]: For 89086/89086 co-relation queries the response was YES. [2023-08-30 19:06:01,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112234 conditions, 30378 events. 21832/30378 cut-off events. For 89086/89086 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 168731 event pairs, 6353 based on Foata normal form. 4/26240 useless extension candidates. Maximal degree in co-relation 112120. Up to 27534 conditions per place. [2023-08-30 19:06:01,558 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 176 selfloop transitions, 12 changer transitions 53/241 dead transitions. [2023-08-30 19:06:01,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 241 transitions, 2573 flow [2023-08-30 19:06:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:06:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:06:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2735 transitions. [2023-08-30 19:06:01,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252176616915423 [2023-08-30 19:06:01,562 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2735 transitions. [2023-08-30 19:06:01,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2735 transitions. [2023-08-30 19:06:01,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:06:01,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2735 transitions. [2023-08-30 19:06:01,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.75) internal successors, (2735), 4 states have internal predecessors, (2735), 0 states have call successors, (0), 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 19:06:01,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 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 19:06:01,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 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 19:06:01,570 INFO L175 Difference]: Start difference. First operand has 98 places, 164 transitions, 1534 flow. Second operand 4 states and 2735 transitions. [2023-08-30 19:06:01,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 241 transitions, 2573 flow [2023-08-30 19:06:02,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 241 transitions, 2532 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-30 19:06:02,224 INFO L231 Difference]: Finished difference. Result has 103 places, 154 transitions, 1463 flow [2023-08-30 19:06:02,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1463, PETRI_PLACES=103, PETRI_TRANSITIONS=154} [2023-08-30 19:06:02,225 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-08-30 19:06:02,225 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 154 transitions, 1463 flow [2023-08-30 19:06:02,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 0 states have call successors, (0), 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 19:06:02,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:06:02,226 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:06:02,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 19:06:02,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 19:06:02,427 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 19:06:02,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:06:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1281119567, now seen corresponding path program 2 times [2023-08-30 19:06:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:06:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333206567] [2023-08-30 19:06:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:06:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 19:06:02,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:02,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333206567] [2023-08-30 19:06:02,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333206567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:06:02,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:06:02,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:06:02,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811883254] [2023-08-30 19:06:02,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:06:02,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:06:02,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:06:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:06:02,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-30 19:06:02,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 154 transitions, 1463 flow. Second operand has 5 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 0 states have call successors, (0), 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 19:06:02,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:02,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-30 19:06:02,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:06:07,802 INFO L130 PetriNetUnfolder]: 23686/33394 cut-off events. [2023-08-30 19:06:07,802 INFO L131 PetriNetUnfolder]: For 83084/83084 co-relation queries the response was YES. [2023-08-30 19:06:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116472 conditions, 33394 events. 23686/33394 cut-off events. For 83084/83084 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 193830 event pairs, 10465 based on Foata normal form. 4/29010 useless extension candidates. Maximal degree in co-relation 116370. Up to 25764 conditions per place. [2023-08-30 19:06:08,221 INFO L137 encePairwiseOnDemand]: 1598/1608 looper letters, 216 selfloop transitions, 25 changer transitions 37/278 dead transitions. [2023-08-30 19:06:08,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 278 transitions, 2720 flow [2023-08-30 19:06:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:06:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:06:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3417 transitions. [2023-08-30 19:06:08,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-30 19:06:08,226 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3417 transitions. [2023-08-30 19:06:08,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3417 transitions. [2023-08-30 19:06:08,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:06:08,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3417 transitions. [2023-08-30 19:06:08,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 683.4) internal successors, (3417), 5 states have internal predecessors, (3417), 0 states have call successors, (0), 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 19:06:08,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:06:08,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 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 19:06:08,237 INFO L175 Difference]: Start difference. First operand has 103 places, 154 transitions, 1463 flow. Second operand 5 states and 3417 transitions. [2023-08-30 19:06:08,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 278 transitions, 2720 flow [2023-08-30 19:06:08,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 278 transitions, 2671 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-30 19:06:08,894 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1399 flow [2023-08-30 19:06:08,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1399, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2023-08-30 19:06:08,895 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2023-08-30 19:06:08,895 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1399 flow [2023-08-30 19:06:08,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 0 states have call successors, (0), 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 19:06:08,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:06:08,896 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:06:08,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 19:06:08,896 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 19:06:08,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:06:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash 774602130, now seen corresponding path program 1 times [2023-08-30 19:06:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:06:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005698457] [2023-08-30 19:06:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:06:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:06:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005698457] [2023-08-30 19:06:11,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005698457] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:06:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552376906] [2023-08-30 19:06:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:11,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:06:11,289 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 19:06:11,293 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 19:06:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:06:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:06:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:06:11,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:06:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:06:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552376906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:06:12,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:06:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-08-30 19:06:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236099361] [2023-08-30 19:06:12,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:06:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:06:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:06:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:06:15,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 595 out of 1608 [2023-08-30 19:06:15,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1399 flow. Second operand has 19 states, 19 states have (on average 599.0) internal successors, (11381), 19 states have internal predecessors, (11381), 0 states have call successors, (0), 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 19:06:15,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:15,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 595 of 1608 [2023-08-30 19:06:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:06:32,224 INFO L130 PetriNetUnfolder]: 60488/84802 cut-off events. [2023-08-30 19:06:32,224 INFO L131 PetriNetUnfolder]: For 210570/210570 co-relation queries the response was YES. [2023-08-30 19:06:32,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300185 conditions, 84802 events. 60488/84802 cut-off events. For 210570/210570 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 550289 event pairs, 2556 based on Foata normal form. 95/73114 useless extension candidates. Maximal degree in co-relation 300067. Up to 20483 conditions per place. [2023-08-30 19:06:32,969 INFO L137 encePairwiseOnDemand]: 1584/1608 looper letters, 804 selfloop transitions, 372 changer transitions 215/1391 dead transitions. [2023-08-30 19:06:32,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 1391 transitions, 12469 flow [2023-08-30 19:06:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 19:06:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 19:06:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 33514 transitions. [2023-08-30 19:06:33,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894617819990956 [2023-08-30 19:06:33,011 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 33514 transitions. [2023-08-30 19:06:33,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 33514 transitions. [2023-08-30 19:06:33,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:06:33,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 33514 transitions. [2023-08-30 19:06:33,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 609.3454545454546) internal successors, (33514), 55 states have internal predecessors, (33514), 0 states have call successors, (0), 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 19:06:33,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 1608.0) internal successors, (90048), 56 states have internal predecessors, (90048), 0 states have call successors, (0), 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 19:06:33,119 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 1608.0) internal successors, (90048), 56 states have internal predecessors, (90048), 0 states have call successors, (0), 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 19:06:33,119 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1399 flow. Second operand 55 states and 33514 transitions. [2023-08-30 19:06:33,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 1391 transitions, 12469 flow [2023-08-30 19:06:39,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 1391 transitions, 12134 flow, removed 133 selfloop flow, removed 6 redundant places. [2023-08-30 19:06:39,548 INFO L231 Difference]: Finished difference. Result has 202 places, 522 transitions, 6233 flow [2023-08-30 19:06:39,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=6233, PETRI_PLACES=202, PETRI_TRANSITIONS=522} [2023-08-30 19:06:39,549 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 156 predicate places. [2023-08-30 19:06:39,549 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 522 transitions, 6233 flow [2023-08-30 19:06:39,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 599.0) internal successors, (11381), 19 states have internal predecessors, (11381), 0 states have call successors, (0), 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 19:06:39,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:06:39,551 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:06:39,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 19:06:39,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:06:39,752 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 19:06:39,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:06:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash 138443101, now seen corresponding path program 1 times [2023-08-30 19:06:39,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:06:39,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704033298] [2023-08-30 19:06:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:06:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:06:40,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704033298] [2023-08-30 19:06:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704033298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:06:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333488456] [2023-08-30 19:06:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:40,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:06:40,096 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 19:06:40,124 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 19:06:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:06:40,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:06:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:06:40,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:06:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:06:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333488456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:06:40,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:06:40,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 19:06:40,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192102834] [2023-08-30 19:06:40,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:06:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 19:06:40,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 19:06:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 19:06:40,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-30 19:06:40,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 522 transitions, 6233 flow. Second operand has 6 states, 6 states have (on average 670.0) internal successors, (4020), 6 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:40,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:40,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-30 19:06:40,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:06:58,560 INFO L130 PetriNetUnfolder]: 56846/79425 cut-off events. [2023-08-30 19:06:58,560 INFO L131 PetriNetUnfolder]: For 820434/820434 co-relation queries the response was YES. [2023-08-30 19:06:59,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415880 conditions, 79425 events. 56846/79425 cut-off events. For 820434/820434 co-relation queries the response was YES. Maximal size of possible extension queue 1911. Compared 509818 event pairs, 20760 based on Foata normal form. 2/71097 useless extension candidates. Maximal degree in co-relation 415718. Up to 78712 conditions per place. [2023-08-30 19:07:00,047 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 514 selfloop transitions, 17 changer transitions 34/565 dead transitions. [2023-08-30 19:07:00,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 565 transitions, 7799 flow [2023-08-30 19:07:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:07:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:07:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2722 transitions. [2023-08-30 19:07:00,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319651741293535 [2023-08-30 19:07:00,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2722 transitions. [2023-08-30 19:07:00,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2722 transitions. [2023-08-30 19:07:00,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:07:00,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2722 transitions. [2023-08-30 19:07:00,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.5) internal successors, (2722), 4 states have internal predecessors, (2722), 0 states have call successors, (0), 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 19:07:00,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 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 19:07:00,057 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 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 19:07:00,058 INFO L175 Difference]: Start difference. First operand has 202 places, 522 transitions, 6233 flow. Second operand 4 states and 2722 transitions. [2023-08-30 19:07:00,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 565 transitions, 7799 flow [2023-08-30 19:07:11,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 565 transitions, 7622 flow, removed 83 selfloop flow, removed 12 redundant places. [2023-08-30 19:07:11,032 INFO L231 Difference]: Finished difference. Result has 182 places, 520 transitions, 6152 flow [2023-08-30 19:07:11,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6152, PETRI_PLACES=182, PETRI_TRANSITIONS=520} [2023-08-30 19:07:11,032 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 136 predicate places. [2023-08-30 19:07:11,032 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 520 transitions, 6152 flow [2023-08-30 19:07:11,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 670.0) internal successors, (4020), 6 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:11,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:07:11,033 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:07:11,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 19:07:11,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:07:11,234 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 19:07:11,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:07:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1248017317, now seen corresponding path program 2 times [2023-08-30 19:07:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:07:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848505077] [2023-08-30 19:07:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:07:11,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:07:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:07:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 19:07:11,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:07:11,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848505077] [2023-08-30 19:07:11,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848505077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:07:11,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:07:11,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:07:11,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75690710] [2023-08-30 19:07:11,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:07:11,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:07:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:07:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:07:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:07:11,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-30 19:07:11,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 520 transitions, 6152 flow. Second operand has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 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 19:07:11,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:07:11,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-30 19:07:11,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:07:28,659 INFO L130 PetriNetUnfolder]: 56465/78816 cut-off events. [2023-08-30 19:07:28,659 INFO L131 PetriNetUnfolder]: For 749513/749513 co-relation queries the response was YES. [2023-08-30 19:07:29,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393717 conditions, 78816 events. 56465/78816 cut-off events. For 749513/749513 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 504732 event pairs, 27498 based on Foata normal form. 2/70516 useless extension candidates. Maximal degree in co-relation 393584. Up to 78291 conditions per place. [2023-08-30 19:07:29,927 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 508 selfloop transitions, 0 changer transitions 41/549 dead transitions. [2023-08-30 19:07:29,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 549 transitions, 7461 flow [2023-08-30 19:07:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:07:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:07:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2716 transitions. [2023-08-30 19:07:29,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-08-30 19:07:29,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2716 transitions. [2023-08-30 19:07:29,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2716 transitions. [2023-08-30 19:07:29,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:07:29,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2716 transitions. [2023-08-30 19:07:29,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 0 states have call successors, (0), 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 19:07:29,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 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 19:07:29,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 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 19:07:29,936 INFO L175 Difference]: Start difference. First operand has 182 places, 520 transitions, 6152 flow. Second operand 4 states and 2716 transitions. [2023-08-30 19:07:29,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 549 transitions, 7461 flow [2023-08-30 19:07:34,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 549 transitions, 7273 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 19:07:34,466 INFO L231 Difference]: Finished difference. Result has 176 places, 508 transitions, 5792 flow [2023-08-30 19:07:34,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5792, PETRI_PLACES=176, PETRI_TRANSITIONS=508} [2023-08-30 19:07:34,467 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2023-08-30 19:07:34,467 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 508 transitions, 5792 flow [2023-08-30 19:07:34,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 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 19:07:34,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:07:34,468 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:07:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 19:07:34,468 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 19:07:34,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:07:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1938677828, now seen corresponding path program 2 times [2023-08-30 19:07:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:07:34,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760968352] [2023-08-30 19:07:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:07:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:07:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:07:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:07:35,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:07:35,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760968352] [2023-08-30 19:07:35,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760968352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:07:35,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107417589] [2023-08-30 19:07:35,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:07:35,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:07:35,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:07:35,145 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 19:07:35,176 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 19:07:35,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:07:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:07:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:07:35,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:07:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:07:35,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:07:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:07:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107417589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:07:36,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:07:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 19:07:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320610172] [2023-08-30 19:07:36,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:07:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:07:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:07:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:07:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:07:36,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 644 out of 1608 [2023-08-30 19:07:36,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 508 transitions, 5792 flow. Second operand has 8 states, 8 states have (on average 649.25) internal successors, (5194), 8 states have internal predecessors, (5194), 0 states have call successors, (0), 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 19:07:36,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:07:36,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 644 of 1608 [2023-08-30 19:07:36,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:07:56,570 INFO L130 PetriNetUnfolder]: 67930/94369 cut-off events. [2023-08-30 19:07:56,570 INFO L131 PetriNetUnfolder]: For 786519/786519 co-relation queries the response was YES. [2023-08-30 19:07:57,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466426 conditions, 94369 events. 67930/94369 cut-off events. For 786519/786519 co-relation queries the response was YES. Maximal size of possible extension queue 2257. Compared 609638 event pairs, 6942 based on Foata normal form. 104/83461 useless extension candidates. Maximal degree in co-relation 466358. Up to 49209 conditions per place. [2023-08-30 19:07:58,195 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 644 selfloop transitions, 92 changer transitions 49/785 dead transitions. [2023-08-30 19:07:58,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 785 transitions, 9791 flow [2023-08-30 19:07:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 19:07:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 19:07:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5334 transitions. [2023-08-30 19:07:58,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146455223880597 [2023-08-30 19:07:58,199 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5334 transitions. [2023-08-30 19:07:58,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5334 transitions. [2023-08-30 19:07:58,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:07:58,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5334 transitions. [2023-08-30 19:07:58,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 666.75) internal successors, (5334), 8 states have internal predecessors, (5334), 0 states have call successors, (0), 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 19:07:58,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1608.0) internal successors, (14472), 9 states have internal predecessors, (14472), 0 states have call successors, (0), 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 19:07:58,211 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1608.0) internal successors, (14472), 9 states have internal predecessors, (14472), 0 states have call successors, (0), 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 19:07:58,211 INFO L175 Difference]: Start difference. First operand has 176 places, 508 transitions, 5792 flow. Second operand 8 states and 5334 transitions. [2023-08-30 19:07:58,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 785 transitions, 9791 flow [2023-08-30 19:08:04,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 785 transitions, 9400 flow, removed 136 selfloop flow, removed 8 redundant places. [2023-08-30 19:08:04,368 INFO L231 Difference]: Finished difference. Result has 171 places, 503 transitions, 5678 flow [2023-08-30 19:08:04,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=171, PETRI_TRANSITIONS=503} [2023-08-30 19:08:04,369 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2023-08-30 19:08:04,370 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 503 transitions, 5678 flow [2023-08-30 19:08:04,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 649.25) internal successors, (5194), 8 states have internal predecessors, (5194), 0 states have call successors, (0), 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 19:08:04,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:08:04,371 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:08:04,379 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 19:08:04,576 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,SelfDestructingSolverStorable17 [2023-08-30 19:08:04,576 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 19:08:04,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:08:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash -42288596, now seen corresponding path program 3 times [2023-08-30 19:08:04,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:08:04,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809460285] [2023-08-30 19:08:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:08:04,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:08:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:08:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:08:06,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:08:06,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809460285] [2023-08-30 19:08:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809460285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:08:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430915886] [2023-08-30 19:08:06,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:08:06,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:08:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:08:06,801 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 19:08:06,805 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 19:08:07,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:08:07,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:08:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 19:08:07,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:08:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 19:08:07,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:08:07,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430915886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:08:07,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:08:07,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2023-08-30 19:08:07,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633790279] [2023-08-30 19:08:07,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:08:07,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:08:07,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:08:07,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:08:07,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:08:07,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 648 out of 1608 [2023-08-30 19:08:07,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 503 transitions, 5678 flow. Second operand has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 0 states have call successors, (0), 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 19:08:07,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:08:07,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 648 of 1608 [2023-08-30 19:08:07,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand